SAE4140 Scm440 42CrMo4 Alloy Forged Steel Bar Shaft

• Type: Forged Alloy Steel Round Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Alloy
• Technique: Forged
• Shape: Bar
• Surface Treatment: Bright or Black
• Model NO.: forged steel
• Special Use: Statically and Dynamically Stressed Components for
• Application: Crankshafts
• Length: All Length Can Be Customized
• Tolerance: -0/+2mm for Turned Surface and -0/+5mm for Black S
• Heat Treatment: Normalized / Annealed / Quenched / Tempered (Optio
• Process: Ef + Lf + Vd + Forged + Heat Treatment (Optional)
• Dellvery Condition: Hot Forged +Rough Machined (Black Surface After Q/
• Test: Ultrasonic Test According to Sep 1921-84 Class C/C
• Forged Shaft: Roller Shaft
• Transport Package: Seaworthy Packing
• Specification: 90mm - 1600mm can be customized
• Trademark: DaJin
• Origin: China
• Production Capacity: 5000tons/Month

Product Description

Forged Alloy Steel Round Bar 4140 1.7225
Hot forging steel bar
Forged parts
SCM440 SCM435 4130 4140 4145 forged bars

1.Chemical Composition (%):

Grade	C	Si	Mn	P	S	Cr	Mo
42CrMo4	0.38-0.45	0.17-0.37	0.40-0.70	≤0.035	≤0.035	0.90-1.20	0.15-0.25
1.7225	0.38-0.45	≤0.40	0.60-0.90	≤0.025	≤0.035	0.90-1.20	0.15-0.30
4140	0.38-0.43	0.15-0.35	0.75-1.00	≤0.035	≤0.040	0.80-1.10	0.15-0.25

2.Available sizes:
Round: Dia. 16 - 1000mm
16mm-350mm with hot rolled supply condition;
200-1600mm with forged supply condition
3.Delivery condition: Hot rolled or forged, Peeled or black surface, annealed or QT.
4.Applications:
Statically and dynamically stressed components for vehicles, engines and machines. For parts of larger cross-sections, crankshafts, gears.
5.Heat Treatment:
Soft annealing: heat to 680-720°C, cool slowly.
Hardness after annealing: Max. 241 HB
Hardening: 820 - 850 °C
Normalizing temperature: 840-880°C
Tempering: 540-680°C
6. Inspection: 100% Ultrasonic according to the test standards:SEP1921-84,GR.3 CLASS C/C
7. Packing situation:  standard seaworthy packing or as customer required
8. Delivery time:  30 days after order confirmed 
9. Process:  EAF+LF+VD ( necessary) +UT+ Peeled(optional)  +Turned (optional) + Heat Treatment (optional)
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