9Cr18MoV chemical composition and mechanical properties, heat treatment process Plano Convex Cylindrical Lens,Si Plano Convex Mirror,Silver Coated Mirrors,Cylindrical Convex Lenses Lambda Research Optics ChangChun,LTD. , https://www.lambdachina.com
Http://news.chinawj.com.cn 9Cr18MoV
Standard: GB/T 1220-1992
â—Features and scope of application:
Used in the manufacture of stainless steel chips, mechanical cutting tools and cutting tools, surgical blades, high wear-resistant equipment parts.
Chemical composition â— Chemical composition:
Carbon C: 0.85~0.95
Silicon Si: ≤0.80
Manganese Mn: ≤0.80
Sulfur S: ≤0.030
Phosphorus P :≤0.035
Chromium Cr: 17.00~19.00
Nickel Ni: Allowable to contain ≤0.60
Vanadium V: 0.07~0.12
Molybdenum Mo: 1.00 to 1.30
Mechanical properties â— Mechanical properties:
Hardness: Annealing, ≤269HB; quenching and tempering, ≥55HRC
Heat treatment process â— Heat treatment specification and metallographic organization:
Heat treatment specifications: 1) annealing, slow cooling at 800 ~ 920 ° C; 2) quenching, oil cooling at 1050 ~ 1075 ° C; 3) tempering, air cooling at 100 ~ 200 ° C.
Metallographic organization: The tissue is characterized by martensite type.
Delivery status: Generally delivered in heat treatment state, the type of heat treatment is indicated in the contract; if not specified, it is delivered in the state of no heat treatment. 
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