4140 4145h 4130 4340 1045 Forged Steel Bar Block Forging Pinion Gear

• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Alloy Steel
• Technique: Hot Rolled;Forging;Cold Drawing
• Shape: Bar
• Surface Treatment: Black Surface or Bright Surface
• Model NO.: forged steel
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Die Steel Bar;Tool Steel Bar
• Ready Stock: Yes
• Length: 3m-12m
• Main Grade: 4140, 4130, 4145h, 4340.8620
• Forged Steel Bar: Forging Steel
• Steel Bar: Steel Round Bar
• Transport Package: Bundle by Wire Rod
• Specification: dia 20mm-600mm
• Trademark: DaJin
• Production Capacity: 8000/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;
200-1000mm 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)