Stainless Steel Investment Castings

Stainless steel is a material that offers excellent mechanical properties and is available in wide variety of grades. Some stainless steel grades come with the added bonus of excellent corrosion resistance and some grades are heat treatable allowing for further enhancement of mechanical and corrosion resistant properties. These are just some of the reasons why stainless steels are commonly used to manufacture a wide range of industrial and commercial investment casting products today. American Casting Company has extensive experience manufacturing investment castings from a vast variety of stainless steel alloys in various shapes and sizes.

Stainless Steel Investment Casting Capabilities of American Casting

The following investment casting capabilities help us serve our clients better:

  • Size: Using the air melt process, we pour all grades of stainless steel from small parts up to 25 lb. parts.
  • Complexity: We can engineer our process to accommodate complex and intricate investment cast part designs.
  • Low and High Volume: We have the ability to produce small quantities of investment cast parts for proof of concept all the way to thousands per year.

Stainless Steel Grades We Cast

We regularly work with the following grades of stainless steel and more:

Stainless Steel – 300 Series

Alloy Heat Treatment UTS (kpsi) YS (kpsi) % Elongation Hardness
303 Annealed 65-75 30-35 35-45 Rb 90 Max
304 Annealed 65-75 30-35 35-45 Rb 90 Max
310 Annealed 65-75 30-35 35-45 Rb 90 Max
316 Annealed 65-75 30-35 35-45 Rb 90 Max
347 Annealed 65-75 30-35 25-35 Rb 90 Max

Stainless Steel – 400 Series

Alloy Heat Treatment UTS (kpsi) YS (kpsi) % Elongation Hardness
410 As Cast 65-75 35-45 20-25 Rb 100 Max
410 Hardened 160-200 120-160 5-12 Rc 32-45
416 Annealed 65-75 35-45 12-18 Rb 100 Max
416 Hardened 95-200 95-160 3-12 Rc 20-40

PH Stainless Steel (Precipitation Hardening)

Alloy Heat Treatment UTS (kpsi) YS (kpsi) % Elongation Hardness
17-4 PH Annealed 10-15 Rc 36 Max
17-4 PH Hardened 150-180 140-160 6-20 Rc 34-44
15-5 PH Hardened 135-170 110-145 5-15 Rc 28-38


Advantages of Stainless Steel Castings

Stainless steel investment castings are used across a wide range of industry sectors for the following reasons:

  • Excellent Corrosion Resistance: Chromium is used as an alloying element in stainless steel which helps improve its anti-corrosive properties. Unlike carbon and alloy steel, stainless steel castings require little or no additional surface finishing. This one reason why stainless steel investment cast parts are used in industrial components such as valves, pumps, and other parts where corrosion resistance is critical.
  • Exceptional Visual Quality: Grade A visual appearance is possible for investment cast parts that require high visual quality.
  • Surface Finishes: 120 RMS or better is easily achieved
  • Close Tolerances: ±.005 inch per inch tolerance levels can be achieved
  • Near Net Shape Parts: Avoid long run time machine parts using near net investment cast parts.

Applications of Stainless Steel Investment Castings

Stainless steel investment castings are used for various applications in the following industries:

  • Medical
  • Mining
  • Petrochemical
  • Agricultures / Food
  • Aerospace
  • Energy
  • Automotive
  • Military
  • Fire arms
  • Machine Tool

Certificates and Compliances

American Casting Company adheres to various quality standards. Our ISO 9001:2015 and AS9100 Rev D certifications suggest our commitment towards high quality standards. In addition to these, we also have:

  • ISO 9001
  • AS9100
  • ITAR (International Traffic In Arms Regulations)
  • EAR (Export Administration Regulations)


  • Nadcap for special processes

American Casting Company is a market leader in manufacturing stainless steel investment castings. Our team of experts work closely with the customers to understand their requirements. These interactions have always helped us create accurate and high quality stainless steel castings in the industries fastest lead times. Do you want to know more about our abilities to make your next stainless steel, or PH stainless steel investment castings? Please contact us to today to Request a Quote on your stainless steel castings.

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