Alloy Steel Forging Bar Components Supplier

• Customization: Available
• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB
• Model NO.: forged parts
• Composition: Alloy Steel or Carbon Steel
• Technique: Forged
• Shape: Bar
• Surface Treatment: Rough Machining or Black Surface
• 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

Discover the premium SCM440, SCM435, 4130, 4140, and 4145 forged bars, forging shafts, and forged parts—crafted for excellence.
Top-tier Forged Alloy Steel Round Bar 4140
1.7225 — A mark of unmatched quality
Hot Forging Steel Bar—crafted with precision and durability
Superior Forged Parts for a multitude of applications
SCM440, SCM435, 4130, 4140, and 4145 forged bars—synonymous with reliability and strength
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: Diameter 1
6
- 1000mm, accommodating various needs
16
mm - 3
5
0mm, available in hot rolled supply condition;
200-1000mm, available in forged supply condition
3.
Delivery Condition : Hot rolled or forged, with options for peeled or black surfaces, annealed or QT.
4. Applications:
Ideal for statically and dynamically stressed components in vehicles, engines, and machines. Perfect for larger cross-sections, crankshafts, and gears.
5. Heat Treatment:
Soft Annealing: Heat to 680-720°C, then cool slowly.
Hardness after Annealing: Maximum of 241 HB
Hardening: Achieved at 820 - 850°C
Normalizing Temperature: Ranging from 840-880°C
Tempering: Effective between 540-680°C
6. Inspection: 100% Ultrasonic inspection adhering to test standards: SEP1921-84, GR.3 CLASS C/C
7. Packing Situation: Standard seaworthy packing or customized as per customer requirements
8. Delivery Time: 30 days post order confirmation
9. Process: EAF+LF+VD (as necessary) +UT+ Peeled (optional) +Turned (optional) + Heat Treatment (optional)

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