Stainless Steel: 9Cr18Mo Standard: GB/T 1220-1992 ● Characteristics and Application: High-carbon chromium stainless steel used for manufacturing bearing rings and rolling elements. ● Chemical Composition: Carbon C: 0.95～1.10 Silicon Si: ≤0.80 Manganese Mn: ≤0.80 Sulfur S: ≤0.030 Phosphorus P: ≤0.035 Chromium Cr: 16.00～18.00 Nickel Ni: Allowed content ≤0.60 Molybdenum Mo: 0.40～0.70 ● Mechanical Properties: Hardness : Annealed, ≤269HB; Quenched and tempered, ≥55HV ● Heat Treatment Specifications and Metallographic Structure: Heat Treatment Specifications: 1) Annealing, 800～900°C slow cooling; 2) Quenching, 1000～1050°C oil cooling; 3) Tempering, 200～300°C air cooling. Metallographic Structure: The structural characteristic is martensitic. ● Delivery Condition: Generally delivered in heat-treated condition, with the type of heat treatment specified in the contract; if not specified, delivered in non-heat-treated condition. |
