4140 Forged Steel Roller Shaft Parts

• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB
• Composition: Alloy Steel or Carbon Steel
• Technique: Forged
• Shape: Bar
• Surface Treatment: Rough Machining or Black Surface
• Model NO.: forged parts
• Special Use: Cold Heading Steel, Mold Steel
• Application: Structural Steel Bar
• Ready Stock Grade: 1045 4140 Forged Steel Bar
• Delivery Time of New Goods: 30days
• Heat Treatment: Qt/Normalized/Annealing
• Rough Machining Diameter Tolerance: -0/+0.5mm
• Transport Package: Seaworthy Packaging
• Specification: 200mm-1000mm
• Trademark: Shandong
• Origin: China
• Production Capacity: 5000tons

Product Description

Premium Quality SCM440 SCM435 4130 4140 4145 Forged Bars, Forging Shaft, and Forged Parts
High-Strength Forged Alloy Steel Round Bar 4140
Specification: 1.7225
Expertly Crafted Hot Forging Steel Bar
Precision Forged Parts
Superior SCM440 SCM435 4130 4140 4145 Forged Bars
1. Comprehensive 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. Wide Range of Available Sizes:
Round: Diameter 1
6
- 1000mm
16
mm-3
5
0mm available in hot rolled supply condition;
200-1000mm available in forged supply condition
3. Delivery Conditions:
Multiple Delivery Conditions : Hot Rolled or Forged, Peeled or Black Surface, Annealed or QT.
4. Versatile Applications:
Ideal for statically and dynamically stressed components in vehicles, engines, and machines. Suitable for larger cross-sections, crankshafts, and gears.
5. Precise Heat Treatment:
Soft Annealing: Heat to 680-720°C, then cool slowly.
Post-Annealing Hardness: Max. 241 HB
Hardening Temperature: 820 - 850 °C
Normalizing Temperature: 840-880°C
Tempering Temperature: 540-680°C
6. Rigorous Inspection: 100% Ultrasonic Inspection according to SEP1921-84, GR.3 CLASS C/C standards.
7. Secure Packing Situation: Standard Seaworthy Packing or Custom Packing as Required
8. Prompt Delivery Time: Approximately 30 Days after Order Confirmation
9. Advanced Process: State-of-the-Art Process: EAF+LF+VD (as necessary) +UT+ Optional Peeling +Optional Turning + Optional Heat Treatment

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