9Cr18Mo stainless steel
Standard
GB / T 1220-1992
Introduction
9Cr18Mo stainless steel is the production of bearing rings and rolling with a high carbon chromium stainless steel. Cutting and slicing machines for stainless steel cutting tools, surgical blades, high wear-resistant equipment, spare parts. 9Cr18 martensitic stainless high carbon chromium bearing steel. After quenching with high hardness and wear resistance, high temperature, low temperature dimensional stability. 9Cr18Mo features and use the same basic and 9Cr18 steel, but has a higher hardness after quenching and tempering resistance stability of the passivation of stainless steel to increase the role of molybdenum. 9Cr18, 9Cr18Mo carbon chromium stainless steel ball Applications: suitable for manufacture in the sea water, river water, nitric acid, steam, and marine and other corrosive media bearing, such as ships, submersible pump components of bearings, oil and chemical machinery bearings, marine instrument bearings.
Chemical composition
Carbon C: 0.90 ~ 1.00 Si Si: ≤ 0.80
Manganese Mn: ≤ 0.80
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.035
Chromium Cr: 17.00 ~ 19.00
Ni: to allow containing ≤ 0.60
Mo Mo: ≤ 0.75 can be added
Hardness
Annealing, ≤ 255HB; quenching and tempering, ≥ 55HV
Heat treatment
1) annealing, 800 ~ 920 ℃ slow cooling;
2) quenching, 1000 ~ 1050 ℃ oil cooling;
3) tempering, 200 ~ 300 ℃ oil, air-cooled.
Microstructure: Organizing for the martensitic type.
Standard
GB / T 1220-1992
Introduction
9Cr18Mo stainless steel is the production of bearing rings and rolling with a high carbon chromium stainless steel. Cutting and slicing machines for stainless steel cutting tools, surgical blades, high wear-resistant equipment, spare parts. 9Cr18 martensitic stainless high carbon chromium bearing steel. After quenching with high hardness and wear resistance, high temperature, low temperature dimensional stability. 9Cr18Mo features and use the same basic and 9Cr18 steel, but has a higher hardness after quenching and tempering resistance stability of the passivation of stainless steel to increase the role of molybdenum. 9Cr18, 9Cr18Mo carbon chromium stainless steel ball Applications: suitable for manufacture in the sea water, river water, nitric acid, steam, and marine and other corrosive media bearing, such as ships, submersible pump components of bearings, oil and chemical machinery bearings, marine instrument bearings.
Chemical composition
Carbon C: 0.90 ~ 1.00 Si Si: ≤ 0.80
Manganese Mn: ≤ 0.80
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.035
Chromium Cr: 17.00 ~ 19.00
Ni: to allow containing ≤ 0.60
Mo Mo: ≤ 0.75 can be added
Hardness
Annealing, ≤ 255HB; quenching and tempering, ≥ 55HV
Heat treatment
1) annealing, 800 ~ 920 ℃ slow cooling;
2) quenching, 1000 ~ 1050 ℃ oil cooling;
3) tempering, 200 ~ 300 ℃ oil, air-cooled.
Microstructure: Organizing for the martensitic type.
