What is CF8M Stainless Steel?
CF8M, whose equivalent type is 316, is the most widely used US standard austenitic stainless steel casting grades. The first letter “C” means this alloy is mainly for the purpose of corrosion resistance. The second letter “F” is the approximate location on the iron-chromium-nickel (FeCrNi) ternary diagram and indicates the iron, chromium and nickel content. The number “8” refers to the maximum carbon content in increments of 0.01%. In this instance, 0.08%. And the last letter “M” means that Molybdenum is present.
It provides a good balance of corrosion resistance, availability, strength and cost. It also has excellent corrosion resistance in normal atmospheric conditions, including coastal exposure. It resists most water and brines at ambient temperature as well.
Chemical Composition of CF8M Stainless Steel
There are two types of different material standard of CF8M stainless steel, one is ASTM A351, and the other is ASTM A743 standard, just little difference in chemical compostions as below:
CF8M in ASTM A351 Standard:
| C | Mn | Si | S | P | Cr | Ni | Mo |
| ≤0.08 | ≤1.50 | ≤1.50 | ≤0.040 | ≤0.040 | 18.0-21.0 | 9.0-12.0 | 2.0-3.0 |
CF8M in ASTM A743 Standard:
| C | Mn | Si | S | P | Cr | Ni | Mo |
| ≤0.08 | ≤1.50 | ≤2.0 | ≤0.040 | ≤0.040 | 18.0-21.0 | 9.0-11.0 | 2.0-3.0 |
Casting of CF8M Stainless Steel
Like other stainless steel alloys (CF3, CF3M, CF8, etc), CF8M stainless steel is one of the common grades used in investment casting. CFS Foundry can make CF8M stainless steel castings in various shapes. If you have any project on CF8M stainless steel casting, pls get in touch with us.
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