12CrNi3A

Description

12CrNi3A钢属于合金渗碳钢,比12CrNi2A钢有更高的淬透性,因此,可以用于制造比12CrNi2A钢截面稍大的零件。该钢淬火低温回火或高温回火后都具有良好的综合力学性能,钢的低温韧性好,缺口敏感性小,切削加工性能良好,

12CrNi3A steel is an alloy carburized steel with higher hardenability than 12CrNi2A steel. Therefore, it can be used to manufacture parts with slightly larger section than 12CrNi2A steel. The steel has good comprehensive mechanical properties after quenching, low-temperature tempering or high-temperature tempering. The steel has good low-temperature toughness, small notch sensitivity and good machinability.

Worldwide equivalents of grade:12CrNi3A

countryChinaFranceEnglandUSA
StandardGBAFNORBS 
Grade12CrNi3A14NC1265M13E3310/3310
 
Chemical Composition of 12CrNi3A Steel Material
C(%)Si(%)Mn(%)P(%)S(%)Cr(%)Ni(%)
0.10-0.170.17-0.370.3-0.6≦0.02≦0.030.6-0.92.75-3.15

Mechanical properties of 12CrNi3A:

Tensile Strength(N/mm2)Elongation %Impact Izod (J)Impact KCV (J)Hardness (HB)Reduction of Area
110015403534150

Critical temperature of 12CrNi3A:

Critical pointAc1Ac3Ar1Ar3Ms
Temperature/℃720810600715409

Mechanical Properties of 12CrNi3A

Tensile strength σb (MPa): ≥930 (95)

Yield strength σs (MPa): ≥685 (70)

Elongation δ5 (%): ≥11

Reduction of ψ (%): ≥50

Impact energy Akv (J): ≥71

Impact toughness αkv (J / cm2): ≥88 (9)

Hardness: ≤217HB

Heat treatment of 12CrNi3A

退火:

温度:870~900℃(推荐890℃)

冷却方式:随炉降温冷却

硬度(HBW):156~229

Annealing:

Temperature: 870 ~ 900 ℃ (890 ℃ recommended)

Cooling mode: reduce cooling with the furnace

Hardness (HBW): 156 ~ 229

正火:

温度:885~940℃       冷却方式:空气中冷却

Normalizing:

Temperature: 885 ~ 940 ℃, cooling mode: cooling in air

淬火

温度:860℃        冷却方式:油中冷却       硬度(HRC):≥43

Quench

Temperature: 860 ℃, cooling mode: cooling in oil, hardness (HRC): ≥ 43

Tempering:

Temperature/℃Cooling modeHardness(HRC)
650-680(High temperature tempering)Air/
520-580 Oil or water20-30
420-48030-70
400-50031-39
150-40039-43

Features and Applications:

是用途较广的高级渗碳钢,与15Cr、20Cr钢相比,其强度、塑性、淬透性均高。

主要用来制作重负荷条件下要求高强度,高硬度和高韧性的主轴及要求中心韧性很高或承受冲击负荷、表面耐磨、热处理变形小的轴、杆以及在高速和冲击负荷下工作的各种传动齿轮、调节螺钉、凸轮轴

It is a high-grade carburized steel with wide application. Compared with 15Cr and 20Cr steel, it has high strength, plasticity and hardenability.

It is mainly used to make spindles requiring high strength, high hardness and high toughness under heavy load conditions, shafts and rods requiring high central toughness or bearing impact load, surface wear resistance and small heat treatment deformation, as well as various transmission gears, adjusting screws and camshafts working under high speed and impact load

Available Size

Round BarDiameter(mm): 6-800mm ,Length: 1000-9000mm or custom size
Plate/Flat/BlockThickness: 6mm-500mm , Width: 20mm-1000mm or custom size
Tolerance±1%,Thickness: +/-0.02mm, Width:+/-2mm

Description

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Mechanical Properties

Physical Properties

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