The 42CrMo Alloy Steel Bar, also referred to as 42CrMo Steel or 42CrMo Alloy Steel Rod, is a high-strength low-alloy steel known for its excellent toughness, wear resistance, and fatigue strength. Manufactured under strict international standards such as ASTM, DIN, and EN, it comes with material certificates, mill test reports, and optional third-party inspection. Its mechanical properties, corrosion resistance, and dimensional stability make it a reliable choice for high-load engineering applications.
Key Features & Advantages
High Strength and Toughness: Ideal for components subjected to heavy loads and dynamic stresses.
Excellent Machinability & Hardening Capability: Supports forging, cutting, welding, and surface treatment.
Uniform Surface Quality: Smooth, defect-free surfaces with good corrosion and wear resistance.
International Standard Compliance: Certified to ASTM, DIN, EN, and ISO standards.
Quality Assurance: Comes with material certificates, testing reports, and optional third-party inspection.
Applications
42CrMo Alloy Steel Rod is widely used in:
Automotive industry: crankshafts, gears, drive shafts
Heavy machinery: hydraulic pistons, rollers, and high-load shafts
Energy equipment: turbines, generators, and transmission shafts
Aerospace components: landing gears, structural supports
Engineering & defense machinery: pins, couplings, and critical load-bearing components
Product Specifications & Technical Data
|
Specification |
Details |
|
Material |
SAE 4140 / 42CrMo / DIN 1.7225 |
|
Diameter Range |
8 mm – 500 mm (customized sizes available) |
|
Length |
1 m – 12 m, or as per request |
|
Surface Finish |
Black, Bright, Peeled, Polished, Turned |
|
Heat Treatment |
Annealed, Quenched & Tempered, Normalized |
|
Hardness (HB) |
197 – 255 HB (annealed); up to 470 HB (quenched & tempered) |
|
Yield Strength |
≥ 735 MPa |
|
Tensile Strength |
930 – 1080 MPa |
|
Elongation |
12 – 15% |
|
Impact Toughness |
≥ 55 J |
|
Standards |
ASTM A29, SAE, DIN, EN 10083 |
Customization Services
Special dimensions and diameters available per drawings
CNC machining, cutting, drilling, welding, and forging services
Multiple heat treatment options to achieve specific hardness or strength
Flexible MOQ for both trial and bulk orders
Custom packaging and protective coatings for export
Pricing & Delivery
Competitive factory-direct pricing with bulk discounts
Available stock for standard sizes for immediate shipment
Customized orders: lead time 7–20 days depending on specification
Export-standard packaging ensures safe worldwide delivery
Our Strength
Jiangsu Cunrui Metal Products Co., Ltd. offers:
Advanced production lines and heat treatment equipment
Annual capacity of thousands of tons
ISO-certified quality management system
Extensive export experience to Europe, Asia, and the Middle East
Experienced technical team and R&D support for complex projects
Service & Support
Fast inquiry response (within 12 hours)
Material selection and technical guidance
Secure export-standard packaging
After-sales support with return/replacement options for quality issues
FAQ
Q1: Can you provide third-party inspection reports?
A1: Yes, SGS, TÜV, and other third-party inspection reports are available upon request.
Q2: What is the minimum order quantity (MOQ)?
A2: MOQ is flexible depending on stock availability and project requirements.
Q3: How does 42CrMo Alloy Steel Rod differ from standard carbon steel?
A3: 42CrMo Alloy Steel offers higher toughness, hardenability, and fatigue resistance for high-load applications.
Q4: What surface finishes are available?
A4: Black, bright, polished, peeled, turned, and customized coatings such as zinc or rust-proof oil are available.
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