9Cr18Mo

9Cr18Mo stainless steel

9Cr18Mo is a high carbon chromium stainless steel for bearing rings and rolling elements. Used as stainless steel cutting machine cutting tools and cutting tools, surgical blades, high wear-resistant equipment parts, etc. 9Cr18 is a high carbon chromium martensitic stainless bearing steel. It has high hardness and abrasion resistance after quenching, and high dimensional stability at high temperature and low temperature. 9Cr18Mo has basically the same characteristics and uses as 9Cr18 steel, but has higher hardness and tempering resistance after quenching. Molybdenum can increase the passivation effect of stainless steel. 9Cr18, 9Cr18Mo high carbon chromium stainless steel steel ball Uses: Suitable for manufacturing bearings in corrosive media such as seawater, river water, nitric acid, steam and marine, such as bearings in marine and submersible pump components, bearings in petroleum and chemical machinery, marine Instrument bearings, etc.

 

characteristic

The higher hardness and medium abrasion resistance, when grinding, it has the disadvantages of relatively high viscosity and rapid heating.

 

use

Suitable for tableware (knives) with good corrosion resistance (magnetic). After quenching, the hardness is higher than that of 440A steel (magnetic), blades, nozzles, valves, rulers, tableware (scissors).

 

chemical composition

Steel number	C	Si≤	Mn≤	S≤	P≤	Cr	Ni≤	Mo
9Cr18Mo	0.95 1.10	0.80	0.80	0.030	0.035	16.00 18.00	0.60	0.40 0.70

 

Mechanical properties

Hardness: Annealing, ≤269HBS; Quenching and tempering, ≥55HRC

 

Heat treatment specifications and metallographic structure:

Heat treatment specifications: 1) Annealing, 800 ～ 900 ℃ slow cooling; 2) Quenching, 1000 ～ 1050 ℃ oil cooling; 3) Tempering, 200 ～ 300 ℃ air cooling.

Metallographic structure: the organization is characterized by martensite type.

 

Delivery status:

Generally, it is delivered in a heat-treated state, and the type of heat treatment is specified in the contract; if it is not specified, it is delivered in a non-heat-treated state.