Experienced supplier of 12CrNi3,Alloy Steel

Home > Product > Alloy Steel > 12CrNi3

12CrNi3

Products Details

Jiangsu Bealloy Co.,Ltd produce special alloy products, including Bar, Rod, Sheet, Plate, Pipe, Tube, Pipe Fittings, Rings, Forgings, Flange, Coil and Strip, etc. If any requirements not found, please email us sales@bealloy.com. We will offer you best price and more details. Any customization are accepted.

12CrNi3 is an alloy carburizing steel , which has higher hardenability than 12CrNi2A steel, so it can be used to make parts with a larger cross section than 12CrNi2A steel.

The steel has good comprehensive mechanical properties after quenching at low temperature or after high temperature tempering. The steel has good low temperature toughness, small notch sensitivity, and good cutting performance. When the hardness is HB260 ～ 320, the relative cutting workability is 60%. ～ 70 In addition, the steel has low hardness and good plasticity after annealing. Therefore, both the cutting method and the cold extrusion method can be used to make the mold. In order to improve the wear resistance of the mold cavity, after the mold is formed, carburizing treatment is required, and then quenching and low temperature tempering are performed to ensure that the mold surface has high hardness and high wear resistance and the core has good toughness. Steel is suitable for making large and medium plastic molds. However, the steel has a tendency to temper brittleness and a tendency to form white spots.

Standards: GB / T 3077-1999

Chemical Composition %

C	Si	Mn	S	P	Cr	Ni	Cu
0.10 - 0.17	0.17 - 0.37	0.30 - 0.60	max 0.035	max 0.035	0.60 - 0.90	2.75 - 3.15	max 0.030

Mechanical properties

Tensile strength σb (MPa)	≥930 (95)
Yield strength σs (MPa)	≥735
Elongation δ5 (%)	≥11
Section shrinkage rate ψ (%)	≥55
Impact work Akv (J)	≥78
Impact toughness value αkv (J / cm2)	≥88 (9)
Hardness (HB)	≤217

In what applications is 12CrNi3 used?

12CrNi3 is a widely used high-grade carburizing steel. Compared with 15Cr and 20Cr steel, its strength, plasticity and hardenability are all higher. It is mainly used to make shafts, rods that require high strength, high hardness and high toughness under heavy load conditions, shafts and rods that require high center toughness or bear impact loads, surface wear resistance, and small heat treatment deformation, and work under high speed and impact loads Various transmission gears, adjusting screws, camshafts.

Heat treatment specifications

Quenching: 860 ° C for the first time, 780 ° C for the second time, oil cooling; 200 ° C for tempering, water cooling and air cooling.

Delivery status

Delivery in the heat treatment (normalizing, annealing or high temperature tempering) or non-heat treatment status. The delivery status should be specified in the contract.