Ming Yuan Metal Products (Shanghai) Limited trading as stainless steel; 9cr18mo; 9cr18mov; 9cr18; die steel; permeability steel; tungsten steel; high-speed steel, etc. Tel: 57888255; Fax: 57888225: Mobile: 15221352988; 

 Standard: GB / T 1220-1992 

 ● Features and Scope: 

 9Cr18Mo is the production of bearing rings and rolling with a high carbon chromium stainless steel. Cutting and slicing machine for cutting stainless steel knives, blades, high-wear parts and other equipment. 9Cr18 martensitic stainless high carbon chromium bearing steel. After quenching with high hardness and wear resistance, high temperature, low temperature dimensional stability. 9Cr18Mo characteristics and uses the same basic and 9Cr18 steel, but has a higher hardness after quenching and tempering resistance stability, passivation of stainless steel to increase the role of molybdenum. 9Cr18, 9Cr18Mo carbon chromium stainless steel ball Uses: Suitable for manufacturing in the sea, river water, nitric acid, steam, and marine and other corrosive media bearing, such as ships, submersible pump parts in the bearing, petroleum and chemical machinery bearings, marine instrument bearings, etc. [1]?. 

 Chemical composition 
 ● Chemical Composition: 

 Carbon C: 0.90 ~ 1.00 

 Si Si: ≤ 0.80 

 Manganese Mn: ≤ 0.80 

 S S: ≤ 0.030 

 Phosphorus P: ≤ 0.035 

 Chromium Cr: 17.00 ~ 19.00 

 Ni: to allow containing ≤ 0.60 

 Mo Mo: can be added to ≤ 0.75 [2]? 

 Mechanical Properties 
 ● Mechanical Properties: 

 Hardness: Annealed, ≤ 255HB; quenching and tempering, ≥ 55HV 

 Heat Treatment 
 ● Heat treatment and microstructure specifications: 

 Heat treatment specifications: 1) annealing, 800 ~ 920 ℃ slow cooling; 2) quenching, 1000 ~ 1050 ℃ oil cooling; 3) temper, 200 ~ 300 ℃ oil, air-cooled. Microstructure: Organizing for the martensite type. 

 ● Delivery status: generally heat treatment delivery, the treatment types specified in the contract; not indicated, according to the heat treatment state of delivery. [3] 

 China Brand representation: 
 According to GB / T "steel grades representation" requirement, the use of phonetic alphabet, Arabic numerals and symbols of chemical elements in the manner in combination. 

 Content: general grade of the head with an Arab figure, said the average carbon content (in parts per thousand dollars); average carbon content of less than one-thousandth of the use of "0"; carbon content of not more than 0.03% with "00" means. 

 Alloying element content: an average of alloying elements less than 1.50%, the grade, only marked elements, generally do not indicate the content; average alloy content of 1.5% -2.49% 2.50% -3.49 22.50% -23.49 %..... %,...., the corresponding labeled 2,3 ..... 13 .... 

 Special purpose stainless steel, the grade of steel use on behalf of the head with the code. 

 For example: 0Cr18Ni9, Y1Cr17 (cutting steel).