Alloy steel / Alloy tool steel / tool steel
Forged ¢ 150 ~ ¢ 600 MM AISI 4140 / JIS SCM440 / GB 42CrMo / DIN 1.7225 Alloy Steel Round Bar with Milled surface
Description:
1.DIN1.7225/SAE4140/GB42CrMo,JIS SCM440 alloy steel round bar
2. Forged condition, annealing or harden, milled surface
3.Pre-heat treatment:
- Annealing : heat to 840-860°c, keep 2H, furnace cold, hardness≤217HBS
- High temperature tempering : heat to 680-700°c, air cold, hardness ≤217HBS
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. 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):
|
Chinese
|
American
|
German
|
Japanese
|
|
GB
|
AISI
|
DIN
|
JIS
|
|
42CrMO4
|
4140
|
1.7225
|
SCM440
|
Specifications:
|
|
Steel plate(mm)
|
Mill name
|
|
|
|
Diameter
|
Length
|
|
|
Forged condition
|
¢150~¢600
|
2500~4000
|
Local mill with 6000tons fluid forged machine
|
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
Competitive Advantage:
- Good purity and homogeneity.
- Good machinability(Roughing, grinding and drilling).
- Good dimensional stability during heat treatment.
- Excellent preparation for nitriding, both ionic and gaseous, induction hardening to increase the
- mechanical properties.
- Competitive price
- Fast production leadtime
- All the material are inspected with 3 times to meet the highly standards
Our Main products:
DongGuan RuiYuan Steel Co.,Ltd Specializes in plastic mould steel, hot work mould steel, cold work mould steel alloy steel and carbon structural steel, such as : P20, P20+Ni, 1.2714, 1.2083, 1.2316, H13, O1, D2, D3, D5, 1045, 1050, A3, 52100(EN31), 4137, 4140, 4340, 5140, 6150, 8620 and SCM420 for exporting over 20 countries now, such as: Brazil, India, Turkey, Italy, Germany, Korea, Malaysia, Iran and so on.