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Basic Differences On Stainless Steel Casting Grades

The stainless steel investment casting process in CFS Foundry can be used to produce stainless steel products in different grades. To have a better understanding, here we would like to share the basic differences of some main grades.

304 Stainless Steel

Also known as 1.4301 stainless steel casting, this material has a full austenitic structure and has sufficient corrosion resistance to creat stainless steel components in most general environments. Common 304 stainless steel castings are used predominantly in kitchens, transport, hospitals, architecture, etc.

316 Stainless Steel

Also known as 1.4401 (or 1.4435 for 316L), this material is also has a full Austenitic structure and is superior in corrosion resistance to grade 304 due to a higher Nickel content and also added Molybdenum, which also makes 316 stainless steel castings more expensive. 316 stainless steel casting is more widely used to creat parts used in more corrosive areas such as marine & boat casting parts.

17-4 Ph Stainless Steel

17-4 PH is also known as 1.4542 or SAE Type 630, is a martensitic precipitation-hardening stainless steel. 17-4 PH stainless steel casting is popular due to its excellent combination of good corrosion resistance and high strength. A wide variety of industries utilize the toughness and strength of 17-4 PH stainless steel castings. Designer use 17-4 PH stainless steel castings for the use of aerospace, chemical, food processing, metal working, paper and pulp, and petrochemical industries.

2205 Duplex Stainless Steel

Also known as S31803 or 1.4462, this material is a stainless steel which has enough Chromium to form an Austenitic crystal structure and therefore it consists of a mixed structure which is both Austenitic and Ferritic.
With the controlling of Nitrogen in the composition, the structure is around 50% Austenite and 50% Ferrite. Because of its high Chrome content, it has superior corrosion resistance in most environments to grade 316 or 316L. Invented in the last 30 years, it is replacing grade 316 in many marine environment applications.

CFS Foundry is one of the largest stainless steel casting companies in China. By our decades of experience with stainless steel investment casting, we can assure you high quality castings, which are produced in a very efficient manner. Want to choose a stainless steel casting company for your project? Pls feel free to send us your drawings!

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