15Cr Alloy steel bar

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11-May-2024

Name: 15Cr alloy steel
Standard: GB / T 3077-1988

15Cr alloy steel chemical composition (%)

C	Si	Mn	S	P	Cr	Ni	Cu
0.12～0.18	0.17～0.37	0.40～0.70	≤0.035	≤0.035	0.70～1.00	≤0.030	≤0.030

15Cr alloy structural steel heat treatment:
The first quenching temperature (℃): 880; Coolant: water, oil
The second quenching temperature (℃): 780 ~ 820; Coolant: water, oil
Tempering heating temperature (℃): 200; Coolant: water, air tensile strength σb (MPa): ≥ 735 (75)
Yield strength σs (MPa): ≥ 490 (50) Elongation δ5 (%): ≥ 11
Reduction of area ψ (%): ≥ 45 Impact energy Akv (J): ≥ 55
Impact toughness αkv (J/cm2): ≥ 69 (7)
Brinell hardness (HBS100/3000) (annealing or tempering state): ≦ 179

Delivery status: to heat treatment (normalizing, annealing or tempering) or without heat treatment delivery, the delivery status should be specified in the contract.

15Cr alloy structural steel main characteristics: It is a common low-carbon alloy carburizing steel, can significantly increase the carbon content in the surface carburizing, carburizing depth increases, but when the grains at high temperatures for a long time carburizing growth tendency and tendency to form carbide network; shape simple, undemanding parts, direct cooling after carburizing quenching, but large deformation after heat treatment, but also temper brittleness of steel hardenability than 15 number of high carbon steel, the critical quenching in oil diameter of 2 ~ 15mm, the critical quenching in water diameter 6 ~ 29mm. In addition, high cold deformation shaping steel, good weldability, machinability in the annealed condition of very good.

15Cr alloy structural steel wide range of uses: This steel is mainly used to manufacture high speed section is not working (≤ 30mm), but require a higher core part strength and toughness and wear-resistant surface carburizing parts such as gears, cams, slide valves, pistons, bushings, crank pins, piston pins, piston rings, couplings, shafts, bearings rings. In addition, this can also be used as a low-carbon martensitic steels hardened steel, used to make strict requirements of deformation, but requires strength, toughness parts.