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DongGuan RuiYuan Steel Co.Ltd

[Province: Guangdong ]

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Milled Surface DIN1.7225 / SAE4140 / GB42CrMo,JIS SCM440, Alloy Steel Plate

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Milled Surface DIN1.7225 / SAE4140 / GB42CrMo,JIS SCM440, Alloy Steel Round Plate

Description:

1.DIN1.7225/SAE4140/GB42CrMo,JIS SCM440 alloy steel plate

2.Hot rolled or forged condition, annealing or harden, black or milled surface

3.Pre-heat treatment:

4.Heat treatment:

Normalization: heating to 840 to 880 ° C, maintenance, furnace cooling to 600 ° C, then in air.
Stress relieving: after rough heat to 500 ° C, maintenance raff. In oven to 400 ° C, then in air.
Hardening: preheating from 600 to 650 ° C austenitizing at 840 to 880 ° C, quenching in oil.
Tempering: heating to 550 - 650 ° C and maintenance regime, again depending on the mechanical properties

5. Hot rolled technology:EAF+LF+VD

Forged technology: EAF+LF+VD+ESR+Forging +Q T + Machined surface

6.Ultrasonic test standard: SPE1921-GR3, CLASS C/C or D/D

7.Production leadtime: 7~10 days

8. Chemical composition:

C	Mn	Si	Cr	Ni	Cu	P	S
0.17-0.23	0.30-0.60	0.15-0.40	1.25-1.75	3.25-3.75	≤0.25	≤0.030	≤0.030

9.Compared grades(based on usage):

Applications:

General service industries (petroleum, food, chemical, paper, fertilizer, Fabric, aviation and nuclear)
Fluid, gas and oil transport
Pressure and heat transmission
Construction and ornament
Boiler heat exchangers