{"id":7898,"date":"2026-07-15T06:46:41","date_gmt":"2026-07-15T06:46:41","guid":{"rendered":"https:\/\/www.bessercast.com\/?p=7898"},"modified":"2026-07-15T06:46:43","modified_gmt":"2026-07-15T06:46:43","slug":"types-of-investment-casting","status":"publish","type":"post","link":"https:\/\/www.bessercast.com\/de\/types-of-investment-casting\/","title":{"rendered":"Die vier Arten des Feingusses: Ein praktischer Leitfaden zur Auswahl f\u00fcr Ingenieure"},"content":{"rendered":"\n<meta charset=\"utf-8\">\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n  <title>The 4 Types of Investment Casting: A Practical Selection Guide for Engineers<\/title>\n\n\n<!-- \u2193\u2193\u2193 Deployable fragment begins \u2193\u2193\u2193 -->\n<div class=\"bd-post\">\n  <style>\n    @import url('https:\/\/fonts.googleapis.com\/css2?family=Poppins:wght@600;700&family=Roboto:wght@400;700&display=swap');\n\n    .bd-post {\n      --prose-width: 1000px;\n      --gap-attach: 16px;\n      --gap-normal: 32px;\n      --gap-section: 48px;\n      --pad-compact: 16px;\n      --pad-standard: 24px;\n\n      --body-bg: #FFFFFF;\n      --body-text: #2C2C2C;\n      --body-text-secondary: #6B6B6B;\n      --body-text-accent: #B8600A;\n      --inverse-bg: #1A1A1A;\n      --inverse-text: #EDEDED;\n      --inverse-text-secondary: #9B9B9B;\n      --inverse-text-accent: #F0A040;\n      --accent: #DD7804;\n      --card-fill: #FCF7F0;\n      --card-border: #E0D0B8;\n      --accent-text-grade: #B8600A;\n      --brand-light-gray: #F7F7F7;\n      --brand-table-border: #DDDDDD;\n      --brand-link: #FF6A00;\n      --brand-black: #000000;\n\n      font-family: 'Roboto', sans-serif;\n      font-size: 17px;\n      font-weight: 400;\n      line-height: 1.6;\n      color: var(--body-text);\n      background: var(--body-bg);\n      padding: 40px;\n      max-width: 100%;\n      box-sizing: border-box;\n    }\n    .bd-post *, .bd-post *::before, .bd-post *::after { box-sizing: border-box; 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}\n      .bd-post .bd-post-article > .bp-1-tip { margin: 12px 0 24px; }\n      .bd-post .bd-post-article > .bp-3-takeaway { margin: 36px 0 24px; }\n      .bd-post .bd-post-article > .bp-5-cta-end { margin: 36px 0 0; }\n      .bd-post .bp-2-row { grid-template-columns: 1fr; }\n      .bd-post .bp-2-cell:not(:last-child) { border-right: none; }\n      .bd-post .bp-4-cta-mid { flex-direction: column; text-align: center; }\n      .bd-post .bp-4-cta-mid-left { flex-direction: column; text-align: center; }\n      .bd-post .bp-4-cta-btn { width: 100%; justify-content: center; }\n      .bd-post .bp-5-cta-end { padding: 32px 20px; }\n      .bd-post .bp-5-cta-end-title { font-size: 20px; }\n      .bd-post .bp-5-cta-end-btn { width: 100%; justify-content: center; }\n    }\n\n  <\/style>\n\n  <article class=\"bd-post-article\">\n    <h1>The 4 Types of Investment Casting: A Practical Selection Guide for Engineers<\/h1>\n\n    <p>When an engineer starts searching &#8220;types of investment casting,&#8221; they are rarely looking for a chemistry lesson. More often, there is a part drawing on the desk \u2014 a stainless steel valve body, a nickel-alloy turbine component, or a batch of carbon steel brackets \u2014 and someone needs to know which process will deliver the right tolerances, surface finish, and cost structure.<\/p>\n\n    <p>Investment casting, also known as lost-wax casting, is not one uniform process. The type you choose determines everything from dimensional accuracy to per-part cost and lead time. This guide breaks down the four main types, explains what each does best, and gives you a practical decision framework for choosing the right one for your project.<\/p>\n\n    <h2>What Defines the Types of Investment Casting<\/h2>\n    <p>The types of investment casting are primarily classified along two dimensions. The first \u2014 and most important for part quality \u2014 is the <strong>shell-building system<\/strong>: the binder and refractory material used to create the ceramic mold around the wax pattern. This is what separates water glass casting from silica sol casting, and it directly controls surface finish, dimensional tolerance, and alloy compatibility.<\/p>\n    <p>The second dimension is the <strong>pouring method<\/strong>: gravity pouring, vacuum casting, or counter-gravity filling. This affects metal cleanliness, internal soundness, and material yield \u2014 critical for aerospace and high-spec applications but less relevant for general industrial parts.<\/p>\n    <p>Think of the shell system as the foundation that sets your quality ceiling. The pouring method is the delivery mechanism \u2014 it determines how cleanly the metal fills the mold. For the vast majority of industrial parts, the shell system is the decision that matters most. The sections that follow walk through each shell type, from the most economical to the most precise.<\/p>\n\n    <figure class=\"bd-image-figure bd-reveal\">\n      <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.bessercast.com\/wp-content\/uploads\/2026\/07\/types-of-investment-casting.webp\" alt=\"The main types of investment casting based on shell materials\" width=\"512\" height=\"384\" loading=\"lazy\">\n    <\/figure>\n\n    <h2>Water Glass (Sodium Silicate) Investment Casting \u2014 The Cost-Effective Workhorse<\/h2>\n    <p>Water glass casting is the most economical entry point into investment casting. It trades some precision and surface quality for lower cost and faster turnaround \u2014 and for many carbon steel and low-alloy steel parts, that trade-off is exactly the right call.<\/p>\n\n    <h3>How the Water Glass Process Works<\/h3>\n    <p>The process gets its name from the binder: sodium silicate (Na\u2082SiO\u2083), a low-cost inorganic compound with a high pH between 11.5 and 12.5. The refractory material is quartz sand, coarser than the zircon sand used in premium processes. The slurry is applied to the wax pattern assembly in layers, but fewer coats are needed compared to silica sol casting \u2014 the shell cures chemically via CO\u2082 gelling or a liquid hardener rather than slow air-drying.<\/p>\n    <p>What really sets the water glass process apart is how it handles dewaxing. Instead of flash-firing the shell in an autoclave, the mold is submerged in hot water at approximately 90\u201395\u00b0C. The wax melts, floats to the surface, and is skimmed off for recycling. The entire shell-building cycle runs 2\u20133 days, roughly half the time required by silica sol.<\/p>\n\n    <div class=\"bp-1-tip bd-reveal\">\n      <svg class=\"bp-1-tip-icon\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"><\/circle><line x1=\"12\" y1=\"16\" x2=\"12\" y2=\"12\"><\/line><line x1=\"12\" y1=\"8\" x2=\"12.01\" y2=\"8\"><\/line><\/svg>\n      <div class=\"bp-1-tip-body\">\n        <div class=\"bp-1-tip-label\">Why Dewaxing Matters<\/div>\n        <p class=\"bp-1-tip-text\">The hot-water dewaxing method is gentler on the ceramic shell than flash-firing, but it limits the process to alloys with lower pouring temperatures. This is the single most important technical boundary between water glass and silica sol \u2014 if your alloy needs more than ~1,100\u00b0C, the water glass shell structure begins to soften. That is when silica sol becomes non-negotiable.<\/p>\n      <\/div>\n    <\/div>\n\n    <h3>Applications, Advantages, and Limitations of Water Glass Casting<\/h3>\n    <p>Water glass investment casting is the default choice for carbon steel and low-alloy steel parts where surface finish requirements are moderate and cost sensitivity is high. Typical applications include agricultural machinery brackets, construction equipment hardware, pump housings, forklift components, and general industrial fittings.<\/p>\n    <p>The advantages are straightforward. Unit cost runs roughly 60\u201370% of an equivalent silica sol casting. The shorter shell-building cycle means faster order turnaround. The process handles larger parts well \u2014 components above 5 kg in weight or exceeding 400 mm in overall dimensions are well within its capability window.<\/p>\n    <p>The trade-offs come in precision and surface quality. Under ISO 8062, water glass casting typically achieves CT7 to CT8 tolerance grades, corresponding to roughly \u00b11.0% linear tolerance. Surface roughness lands in the Ra 6.3\u201325 \u03bcm range \u2014 adequate for non-sealing surfaces but insufficient for gasket faces or visible-grade finishes without secondary machining. Thin walls below 2 mm are problematic. And because the quartz-based shell is more porous than a zircon shell, certain stainless steel grades can suffer from surface oxidation and a defect pattern foundry engineers know as &#8220;frosting.&#8221;<\/p>\n    <p><strong>Practical rule of thumb<\/strong>: if your part is carbon steel, weighs over 5 kg, has no surface finish tighter than Ra 6.3 \u03bcm, and price is the primary concern \u2014 water glass is your starting point.<\/p>\n\n    <h2>Silica Sol (Colloidal Silica) Investment Casting \u2014 The Precision Standard<\/h2>\n    <p>Silica sol casting is what most engineers picture when they think of precision investment casting. It costs more and takes longer, but the as-cast quality it delivers often eliminates or substantially reduces downstream machining \u2014 making the total cost equation far more favorable than the unit price suggests.<\/p>\n\n    <h3>How the Silica Sol Process Achieves Superior Precision<\/h3>\n    <p>Four technical factors separate silica sol from water glass at the molecular level. First, the binder: colloidal silica is a stable dispersion of nanoscale SiO\u2082 particles (5\u2013100 nm) in near-neutral-pH water. These particles pack densely as water evaporates during air-drying, creating a mold shell that is intrinsically less porous than a chemically gelled water glass shell.<\/p>\n    <p>Second, the refractory material: silica sol shells use zircon sand (zirconium silicate) instead of quartz. Zircon has a melting point above 2,000\u00b0C, which means the shell stays dimensionally stable when pouring high-temperature alloys \u2014 nickel-based superalloys at 1,350\u20131,500\u00b0C, or stainless steels at 1,580\u20131,620\u00b0C.<\/p>\n    <p>Third, the shell-building rhythm: each layer must air-dry under controlled temperature and humidity before the next is applied. This takes 5\u20137 days for a full shell, roughly twice as long as water glass, but the slow cure prevents the micro-cracks that plague faster processes.<\/p>\n    <p>Fourth, dewaxing and burnout: the shell goes through flash-firing or autoclave dewaxing, followed by a high-temperature sintering cycle at 870\u20131,095\u00b0C. This eliminates every trace of wax and moisture while sintering the ceramic particles into a dense, strong mold.<\/p>\n\n    <h3>Applications, Advantages, and Limitations of Silica Sol Casting<\/h3>\n    <p>Silica sol is the go-to process whenever the material is stainless steel, duplex stainless, or a nickel-based alloy. Typical applications cluster in industries where failure is expensive: valve bodies and pump impellers for chemical processing, turbocharger wheels for automotive, surgical instruments and implant components, food-grade sanitary fittings, marine hardware exposed to saltwater corrosion, and aerospace structural castings.<\/p>\n    <p>The precision metrics explain why. Silica sol routinely achieves CT4\u2013CT6 tolerance grades under ISO 8062, or approximately \u00b10.5% linear tolerance. Surface finish as-cast runs Ra 1.6\u20136.3 \u03bcm \u2014 smooth enough that sealing surfaces often require no additional machining. Minimum wall thickness can go as low as 0.6 mm, enabling thin-walled geometries that water glass simply cannot reproduce.<\/p>\n    <p>The cost premium is real: per-part pricing typically runs 25\u201340% above water glass. And the longer shell-building cycle means lead times stretch accordingly. But this is where the total-cost-of-ownership lens becomes essential. A silica sol valve body may cost 30% more as a raw casting, but if it saves you a CNC facing operation on the flange sealing surface, the fully machined part can actually be cheaper than the water glass equivalent. For annual volumes under approximately 1,000 pieces \u2014 where tooling amortization dominates \u2014 silica sol is the economically rational choice for precision parts.<\/p>\n\n    <figure class=\"bd-image-figure bd-reveal\">\n      <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.bessercast.com\/wp-content\/uploads\/2026\/07\/types-of-investment-casting1.webp\" alt=\"Silica sol investment casting producing high precision parts\" width=\"512\" height=\"384\" loading=\"lazy\">\n    <\/figure>\n\n    <!-- BP-2: Comparison Card (v2: stacked rows) -->\n    <div class=\"bp-2-compare bd-reveal\">\n      <div class=\"bp-2-row-label\">At a Glance: Water Glass vs. Silica Sol<\/div>\n      <div class=\"bp-2-row\">\n        <div class=\"bp-2-cell\">\n          <div class=\"bp-2-cell-header\">\n            <svg width=\"20\" height=\"20\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12 2.69l5.66 5.66a8 8 0 1 1-11.31 0z\"><\/path><\/svg>\n            <span>Water Glass<\/span>\n          <\/div>\n        <\/div>\n        <div class=\"bp-2-cell\">\n          <div class=\"bp-2-cell-header\">\n            <svg width=\"20\" height=\"20\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12 20h9\"><\/path><path d=\"M16.5 3.5a2.121 2.121 0 0 1 3 3L7 19l-4 1 1-4L16.5 3.5z\"><\/path><\/svg>\n            <span>Silica Sol<\/span>\n          <\/div>\n        <\/div>\n      <\/div>\n      <div class=\"bp-2-row\">\n        <div class=\"bp-2-cell\"><div class=\"bp-2-cell-body\"><ul><li><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"20 6 9 17 4 12\"><\/polyline><\/svg>Cost-effective \u2014 ~60\u201370% of silica sol price<\/li><li><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"20 6 9 17 4 12\"><\/polyline><\/svg>Fast turnaround \u2014 shell built in 2\u20133 days<\/li><li><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"20 6 9 17 4 12\"><\/polyline><\/svg>Handles larger parts (&gt;5 kg, &gt;400 mm)<\/li><\/ul><p style=\"font-size:13px;color:var(--body-text-secondary);margin:8px 0 0;\">Limitation: CT7\u2013CT8, Ra 6.3\u201325 \u03bcm, no stainless steels<\/p><\/div><\/div>\n        <div class=\"bp-2-cell\"><div class=\"bp-2-cell-body\"><ul><li><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"20 6 9 17 4 12\"><\/polyline><\/svg>CT4\u2013CT6 precision \u2014 \u00b10.5% linear tolerance<\/li><li><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"20 6 9 17 4 12\"><\/polyline><\/svg>All stainless steels, nickel alloys, superalloys<\/li><li><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"20 6 9 17 4 12\"><\/polyline><\/svg>Ra 1.6\u20136.3 \u03bcm as-cast, walls down to 0.6 mm<\/li><\/ul><p style=\"font-size:13px;color:var(--body-text-secondary);margin:8px 0 0;\">Limitation: 25\u201340% higher unit cost, longer lead time<\/p><\/div><\/div>\n      <\/div>\n    <\/div>\n\n    <h2>Specialty Investment Casting Methods You Should Know<\/h2>\n    <p>Three more investment casting methods fill the gaps where water glass and silica sol fall short. They are not everyday tools, but knowing they exist can save an engineer from specifying the wrong process for an advanced application.<\/p>\n    <div class=\"table-wrapper\"><table>\n      <thead><tr><th>Method<\/th><th>How It Works<\/th><th>Best For<\/th><\/tr><\/thead>\n      <tbody>\n        <tr><td><strong>Vacuum Investment Casting<\/strong><\/td><td>Melting and pouring performed inside a vacuum chamber (typically 10\u207b\u00b9\u201310\u207b\u00b3 Pa), eliminating gas porosity and oxidation during mold filling<\/td><td>Nickel-based superalloys (Inconel, Hastelloy), titanium alloys, aerospace turbine hot-section components<\/td><\/tr>\n        <tr><td><strong>Counter-Gravity (Hitchiner Process)<\/strong><\/td><td>A vacuum draws molten metal upward into the mold from below the melt surface, yielding metal utilization of 60\u201395% vs. 15\u201350% for gravity pouring<\/td><td>Thin-walled complex geometries, aerospace structural parts requiring highest metal cleanliness<\/td><\/tr>\n        <tr><td><strong>Plaster Mold Investment Casting<\/strong><\/td><td>Gypsum-based investment slurry poured into a flask around the wax pattern; lower-temperature burnout, no ceramic shell firing needed<\/td><td>Aluminum and copper alloys with melting points below ~1,100\u00b0C, finest surface detail parts<\/td><\/tr>\n      <\/tbody>\n    <\/table><\/div>\n    <p>For 90% of industrial investment casting projects, the water glass and silica sol processes cover the requirement. These specialty methods are the high-performance tools you reach for when the application \u2014 or the alloy \u2014 demands something beyond the mainstream.<\/p>\n\n    <!-- BP-3: Bridge (v2: centered callout) -->\n    <div class=\"bp-3-takeaway bd-reveal\">\n      <div class=\"bp-3-takeaway-icon-wrapper\">\n        <svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"><\/circle><circle cx=\"12\" cy=\"12\" r=\"6\"><\/circle><circle cx=\"12\" cy=\"12\" r=\"2\"><\/circle><\/svg>\n      <\/div>\n      <div class=\"bp-3-takeaway-label\">The Bottom Line<\/div>\n      <p class=\"bp-3-takeaway-text\">For 90% of industrial projects, water glass or silica sol covers your needs. The question is not which type is better \u2014 it is which type matches your material, tolerance requirements, and budget. The decision framework below walks you through it.<\/p>\n    <\/div>\n\n    <figure class=\"bd-image-figure bd-reveal\">\n      <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.bessercast.com\/wp-content\/uploads\/2026\/07\/types-of-investment-casting2.webp\" alt=\"Decision framework for choosing casting processes\" width=\"512\" height=\"384\" loading=\"lazy\">\n    <\/figure>\n\n    <h2>How to Choose the Right Investment Casting Type for Your Project<\/h2>\n    <p>Knowing the four types is useful. Knowing which one fits your part is what turns knowledge into a purchase order. The selection logic boils down to three variables: material (determines what is technically possible), precision and surface requirements (determine what grade of process you need), and budget and lead time (determine the final decision). Work through them in that order.<\/p>\n\n    <h3>Material-Process Compatibility at a Glance<\/h3>\n    <p>The fastest way to narrow your options is to check whether your alloy is compatible with each process. Not every metal works with every shell system \u2014 the casting temperature and chemical reactivity of the alloy impose hard boundaries.<\/p>\n    <div class=\"table-wrapper\"><table>\n      <thead><tr><th>Alloy Category<\/th><th>Water Glass<\/th><th>Silica Sol<\/th><th>Notes<\/th><\/tr><\/thead>\n      <tbody>\n        <tr><td>Carbon Steel \/ Low-Alloy Steel<\/td><td>\u2713 Recommended<\/td><td>\u2713 Works<\/td><td>Both processes handle these well; water glass is more economical<\/td><\/tr>\n        <tr><td>304 \/ 316 Stainless Steel<\/td><td>\u2717 Not recommended<\/td><td>\u2713 Recommended<\/td><td>Stainless demands silica sol to avoid surface oxidation and achieve Ra 3.2 \u03bcm or better<\/td><\/tr>\n        <tr><td>Duplex Stainless (2205, 2507)<\/td><td>\u2717 Not recommended<\/td><td>\u2713 Required<\/td><td>Pouring temperatures of 1,580\u20131,620\u00b0C exceed water glass shell limits<\/td><\/tr>\n        <tr><td>Nickel Alloys (Inconel, Hastelloy)<\/td><td>\u2717 Not compatible<\/td><td>\u2713 Required (or vacuum)<\/td><td>Pouring at 1,350\u20131,500\u00b0C; water glass shells soften above ~1,100\u00b0C<\/td><\/tr>\n        <tr><td>Aluminum \/ Copper Alloys<\/td><td>\u2713 Works<\/td><td>\u2713 Works<\/td><td>Both compatible; plaster mold also an option<\/td><\/tr>\n        <tr><td>Titanium Alloys<\/td><td>\u2717 Not compatible<\/td><td>Limited<\/td><td>Vacuum casting is standard due to titanium&#8217;s reactivity with oxygen<\/td><\/tr>\n      <\/tbody>\n    <\/table><\/div>\n    <p>If your material appears in the &#8220;Not recommended&#8221; column for the process you were considering, stop there \u2014 no amount of cost savings justifies a process that cannot reliably cast your alloy. When in doubt, send your material specification to your foundry and ask for a formal feasibility assessment before committing to tooling.<\/p>\n\n    <h3>A Practical Decision Tree for Selecting Your Investment Casting Type<\/h3>\n    <p>Once you have confirmed material compatibility, work through these four steps. This is the same sequence an experienced foundry engineer follows when quoting a new part.<\/p>\n    <p><strong>Step 1 \u2014 Identify your material category.<\/strong><br>Is your part stainless steel, duplex stainless, nickel alloy, or titanium? If yes, jump directly to Step 3 \u2014 you need silica sol or vacuum casting. If your part is carbon steel or low-alloy steel, proceed to Step 2.<\/p>\n    <p><strong>Step 2 \u2014 Check your precision and surface requirements.<\/strong><br>Do you need tolerances of CT6 or tighter? Is your surface finish requirement Ra 6.3 \u03bcm or smoother? Is any wall section thinner than 2 mm? A &#8220;yes&#8221; to any one of these pushes you toward silica sol. Three &#8220;no&#8221; answers mean water glass is a viable option.<\/p>\n    <p><strong>Step 3 \u2014 Check for special application requirements.<\/strong><br>Is this an aerospace, medical, or food-contact application? If yes, silica sol or vacuum casting is the baseline \u2014 regulatory and quality system requirements effectively rule out water glass. Does your alloy require vacuum melting (titanium, certain nickel grades)? If yes, vacuum investment casting is your only option.<\/p>\n    <p><strong>Step 4 \u2014 Run the economics.<\/strong><br>If you have reached this step with both water glass and silica sol still viable, the tiebreaker is volume and total cost. Annual demand under roughly 1,000 pieces favors silica sol \u2014 the lower tooling amortization and reduced machining cost offset the higher unit price. Annual demand above 1,000 pieces, with carbon steel material and moderate finish requirements, makes water glass the more economical choice. Critically, compare total part cost \u2014 casting plus machining \u2014 not the casting price alone. The 25\u201340% casting premium for silica sol often shrinks to 10\u201315% or less when machining savings are factored in.<\/p>\n    <p>Here is something most first-time buyers miss: not every foundry operates both water glass and silica sol production lines. A facility that only runs one process has an incentive \u2014 conscious or not \u2014 to steer every inquiry toward the process it owns. Working with a manufacturer that maintains both lines, such as BesserCast, means the process recommendation you receive is driven by your part&#8217;s requirements rather than the factory&#8217;s equipment limitations. If you are unsure which type fits your component, sending the drawing to a dual-process foundry for a technical assessment costs nothing and can prevent an expensive mis-specification.<\/p>\n\n    <div class=\"bp-4-cta-mid bd-reveal\">\n      <div class=\"bp-4-cta-mid-left\">\n        <svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><line x1=\"22\" y1=\"2\" x2=\"11\" y2=\"13\"><\/line><polygon points=\"22 2 15 22 11 13 2 9 22 2\"><\/polygon><\/svg>\n        <p class=\"bp-4-cta-mid-text\">Not sure which process fits your part? Send us your drawing \u2014 our engineering team runs a free casting simulation and recommends the right type, not the one we happen to own.<\/p>\n      <\/div>\n      <a href=\"https:\/\/www.bessercast.com\/contact\/\" class=\"bp-4-cta-btn\" target=\"_self\">Get a Free Process Assessment \u2192<\/a>\n    <\/div>\n\n    <p><em>If you would like a no-obligation technical review of your part drawing to determine the most suitable investment casting process, BesserCast&#8217;s engineering team offers free feasibility assessments including casting simulation analysis \u2014 <a href=\"https:\/\/www.bessercast.com\/contact\/\">request a consultation here<\/a>.<\/em><\/p>\n\n    <div class=\"bp-5-cta-end bd-reveal\">\n      <svg class=\"bp-5-cta-end-icon\" width=\"36\" height=\"36\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect x=\"2\" y=\"4\" width=\"20\" height=\"16\" rx=\"2\"><\/rect><path d=\"m22 7-8.97 5.7a1.94 1.94 0 0 1-2.06 0L2 7\"><\/path><\/svg>\n      <div class=\"bp-5-cta-end-title\">Start Your Investment Casting Project With a Technical Review<\/div>\n      <p class=\"bp-5-cta-end-subtitle\">Free feasibility assessment. Casting simulation included. Response within 24 hours.<\/p>\n      <a href=\"https:\/\/www.bessercast.com\/contact\/\" class=\"bp-5-cta-end-btn\" target=\"_self\">Request Your Free Assessment \u2192<\/a>\n    <\/div>\n\n    <h2>References<\/h2>\n    <ol>\n      <li>ISO 8062:1994. &#8220;Castings \u2014 System of dimensional tolerances and machining allowances.&#8221; International Organization for Standardization.<\/li>\n      <li>Campbell, John. <em>Complete Casting Handbook: Metal Casting Processes, Metallurgy, Techniques and Design.<\/em> 2nd Edition, Elsevier\/Butterworth-Heinemann, 2015. <a href=\"https:\/\/www.sciencedirect.com\/book\/monograph\/9781856178099\/complete-casting-handbook\" target=\"_blank\" rel=\"noopener\">sciencedirect.com<\/a><\/li>\n      <li>Metal-Castings.com. &#8220;Types of Investment Casting.&#8221; Updated July 2025. <a href=\"https:\/\/metal-castings.com\/types-of-investment-casting\/\" target=\"_blank\" rel=\"nofollow noopener\">metal-castings.com<\/a><\/li>\n      <li>BesserCast. &#8220;Casting Process.&#8221;<\/li>\n      <li>BesserCast. &#8220;Contact.&#8221; <a href=\"https:\/\/www.bessercast.com\/contact\/\" target=\"_blank\" rel=\"noopener\">bessercast.com<\/a><\/li>\n      <li>BesserCast. Official Website. <a href=\"https:\/\/www.bessercast.com\/\" target=\"_blank\" rel=\"noopener\">bessercast.com<\/a><\/li>\n    <\/ol>\n  <\/article>\n<\/div>\n<!-- \u2191\u2191\u2191 Fragment ends here \u2191\u2191\u2191 -->\n","protected":false},"excerpt":{"rendered":"<p>The 4 Types of Investment Casting: A Practical Selection Guide for Engineers The 4 Types of Investment Casting: A Practical Selection Guide for Engineers When an engineer starts searching &#8220;types of investment casting,&#8221; they are rarely looking for a chemistry lesson. More often, there is a part drawing on the desk \u2014 a stainless steel [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":7904,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Types of Investment Casting: Compare Cost & Tolerances","_seopress_titles_desc":"Review the types of investment casting to match your material and budget. Compare silica sol precision with water glass economy. Start your project today.","_seopress_robots_index":"","footnotes":""},"categories":[35],"tags":[],"class_list":["post-7898","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mml-blog"],"_links":{"self":[{"href":"https:\/\/www.bessercast.com\/de\/wp-json\/wp\/v2\/posts\/7898","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bessercast.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bessercast.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bessercast.com\/de\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bessercast.com\/de\/wp-json\/wp\/v2\/comments?post=7898"}],"version-history":[{"count":2,"href":"https:\/\/www.bessercast.com\/de\/wp-json\/wp\/v2\/posts\/7898\/revisions"}],"predecessor-version":[{"id":7906,"href":"https:\/\/www.bessercast.com\/de\/wp-json\/wp\/v2\/posts\/7898\/revisions\/7906"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bessercast.com\/de\/wp-json\/wp\/v2\/media\/7904"}],"wp:attachment":[{"href":"https:\/\/www.bessercast.com\/de\/wp-json\/wp\/v2\/media?parent=7898"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bessercast.com\/de\/wp-json\/wp\/v2\/categories?post=7898"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bessercast.com\/de\/wp-json\/wp\/v2\/tags?post=7898"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}