4140 Forged Steel Shaft Parts Manufacturer

• 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 premium-quality SCM440, SCM435, 4130, 4140, and 4145 forged bars, meticulously crafted forging shafts, and robust forged parts tailored to meet your exact specifications.
Introducing the superior Forged Alloy Steel Round Bar 4140, engineered for excellence and durability.
Premium-grade 1.7225 steel, ensuring exceptional performance and reliability.
Expertly Hot Forging Steel Bars designed to withstand demanding applications.
High-precision Forged Parts, crafted for ultimate strength and resilience.
Top-tier SCM440, SCM435, 4130, 4140, 4145 forged bars, expertly manufactured to excel in every application.
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. 1
6
- 1000mm
16
mm - 3
5
0mm available with hot rolled supply condition;
200-1000mm available with forged supply condition.
3.
Delivery Condition : Hot rolled or forged, Peeled or black surface, annealed or QT for optimal performance.
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, cool slowly to ensure optimal material properties.
Hardness after annealing: Max. 241 HB for superior strength.
Hardening: 820 - 850 °C to achieve desired hardness.
Normalizing Temperature: 840-880°C for improved structural integrity.
Tempering: 540-680°C for enhanced toughness and stability.
6. Inspection: Comprehensive 100% Ultrasonic inspection according 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 after order confirmation, ensuring timely delivery.
9. Process: EAF+LF+VD (necessary) +UT+ Peeled (optional) +Turned (optional) + Heat Treatment (optional) to meet the highest quality standards.

Keywords: forged steel bar, forging parts, forging rings, 4140 forged steel bar, forged round bars, hot forging, steel forging, forged round bar, round bar 4140, 42CrMo4 steel bar, forging, forged. Discover the best in class with Shandong Dajin Metal Material Co., Ltd.