Good translation Metal Products (Shanghai) carburizing steel companies (domestic case-hardened steel / import-hardened steel) 12CRNI3 hardened steel / 12CRNI3 steel / 12CRNI3 steel bar / 12CRNI3 Coil / 12CRNI3 steel / 12CRNI3 pipe / 12CRNI3 wire (good Translation Metal Products (Shanghai) Co., Ltd.) 
 Military Steel: 12CrNi3 
 Standard: GB / T 3077-1988 
 ● Features and application: 
 The wider use of advanced carburizing steel with 15Cr, 20Cr steel compared to its strength, ductility, hardenability are high. Mainly used to produce heavy-duty conditions requiring high strength, high hardness and high toughness requirements of central spindle and high toughness or shock loading, surface wear, heat deformation of the shaft, rod, and the impact of high-speed and work load a variety of gear, adjust the screw, camshaft 
 ● Chemical Composition: 
 Carbon C: 0.10 ~ 0.17 
 Si Si: 0.17 ~ 0.37 
 Manganese Mn: 0.30 ~ 0.60 
 Sulfur S: to allow the residual content of ≤ 0.035 
 Phosphorus P: allow the residual content ≤ 0.035 
 Chromium Cr: 0.60 ~ 0.90 
 Ni-Ni: 2.75 ~ * 
 Copper Cu: to allow the residual content ≤ 0.030 
 ● Mechanical Properties: 
 Tensile strength σb (MPa): ≥ 930 (95) 
 Yield strength σs (MPa): ≥ 685 (70) 
 Elongation δ5 (%): ≥ 11 
 Reduction of area ψ (%): ≥ 50 
 Impact energy Akv (J): ≥ 71 
 Impact toughness αkv (J/cm2): ≥ 88 (9) 
 Hardness: ≤ 217HB 
 Sample size: Sample size is 15mm rough 
 ● Heat treatment and microstructure specifications: 
 Standard heat treatment: quenching: the first 860 ℃, the second 780 ℃, oil cooling; tempering 200 ℃, water, air-cooled. 
 ● Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract. 
 ● processing performance: When the hardness HB260 ~ 320, the relative machinability of 60% to 70%. 
 The company offers domestic and imported varieties of carbon steel material, complete specifications, special specifications can be customized processing. Division I and to provide original certificates, material certificates (chemical mechanical properties) and the like arguments! Please note that request! Users are welcome to inquire Order, the Company will be free shipping! If necessary, other materials, please call us. 
 Customers ordering materials, customers need to sample pieces of note, the MOQ: 50KG from (包邮) quantity excellent price, please call to order this material, our commitment to: quality assurance! Excellent and inexpensive price! Honesty! 

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