ASTM A756 specification covers the requirements for chromium-carbon bearing quality stainless steel to be used in the manufacture of anti-friction bearings. Grade 440C is a type of Martensitic stainless steel containing 16-18% Cr. It provides strong rust resistance, high temperature resistance and dimensional stability, can be used as corrosion resistant high temperature bearing steel.
Standards: ASTM A 756
Size: 3.3mm - 260mm
Surface treatment: Polished, rolled
The Equivalent Standards:
DIN | ASTM | JIS | GB |
1.4125 | 440C | SUS 440C | 9Cr18Mo |
Chemical composition:
C | Si | Mn | Cr | Ni | S | P |
0.95 - 1.2 | 1.0 | 1.0 | 16.0-18.0 | 0.75 | ≤0.03 | ≤0.04 |
Maximum Hardness:
Hot-rolled-annealed bars | 255 HB |
Cold-drawn-annealed bars | 255 HB |
Tubes annealed-cold-drawn bars | As agreed upon between the purchaser and the manufacturer |
Heat treatment
1) Annealing, slow cooling at 800 ~ 920℃;
2) Quenching,1010 ~ 1070℃ oil cooling;
3) Tempering,100 ~ 180℃ fast cooling.
Applications
The 440C can be used to manufacture bearing parts that work in corrosive and non-lubricated environments with strong oxidation. It can also be used to make surgical knives, scissors, nozzles, bearings, etc. 440C is also applicable to the production of seawater, river water, nitric acid, steam and Marine corrosive media bearing, such as ships, submersible pump components in the bearing, petroleum and chemical machinery, Marine instruments bearing.
World iron&steel is a professional supplier of alloy steel rods and bars. We manufacture and distribute high quality 440C steel round bar for bearing application in accordance with standards ASTM A756, specified delivery conditions and final customer specifications for industrial and commercial applications. Special sizes of steel bars and delivery issues can be further negotiated and we provide a wide range of solutions for purchasing departments to select alternative grades, contact us today!
