9Cr18、11Cr17

● Characteristics and scope of application:

9Cr18 stainless steel is used for stainless steel cutting machine cutting tools and cutting tools, surgical blades, high wear-resistant equipment parts, etc.

9Cr18 steel is a high carbon high chromium martensitic stainless steel, which has high hardness, high wear resistance and corrosion resistance after quenching. The steel is suitable for manufacturing plastic molds that withstand high wear resistance, high load, and under the action of corrosive media. This steel belongs to Lai's steel body, and it is easy to form uneven carbide segregation and affect the service life of the mold. Therefore, the hot working process must be strictly controlled during hot working, and the appropriate processing ratio must be paid attention

 

● Chemical composition:

Steel number	C≤	Si≤	Mn≤	S≤	P≤	Cr	Mo≤	Ni≤
9Cr18	0.95 1.20	1.00	1.00	0.030	0.040	16.00 18.00	0.75	0.60

 

● Mechanical properties:

Hardness: annealing, ≤269HB; quenching and tempering, ≥58HRC

 

● Heat treatment specifications and metallographic structure:

Heat treatment specifications: 1) annealing, slow cooling at 800 ～ 920 ℃; 2) quenching, oil cooling at 1010 ～ 1070 ℃; 3) tempering, air cooling at 100 ～ 180 ℃.

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.