High Strength Alloy Steel Cold Drawn Bar (4140 / SCM440)
Premium High-Strength Cold Drawn Bars for Heavy-Duty Applications
YaDa Metal produces high-performance alloy steel cold drawn bars using premium 4140 (42CrMo) and SCM440 materials. These bars provide significantly higher strength, toughness, and wear resistance compared to standard carbon steel bars. Our 4140/SCM440 cold drawn bars are ideal for demanding applications in automotive, heavy machinery, hydraulic systems, and precision engineering.
Key Features
High Strength & Toughness — Much stronger than 1045/CK45 carbon steel
Excellent Wear Resistance — Ideal for high-load and high-wear conditions
Good Hardenability — Can be heat treated (quenched & tempered) for enhanced performance
Tight Tolerance — ±0.05mm
Superior Surface Finish — Bright and smooth (Ra 0.4–1.6μm)
Excellent Machinability — Good cutting performance in the annealed condition
Wide Size Range — Round, square, flat, and hexagonal shapes available
Specifications
| Parameter | Details |
|---|---|
| Product Name | Alloy Steel Cold Drawn Bar (4140 / SCM440) |
| Material | 4140 (42CrMo), SCM440 |
| Tolerance | ±0.05mm |
| Diameter / Size | Round: 10–300mm; Square: 10–90mm; Flat: 3–60 × 4–110mm |
| Length | 3m – 6m (standard), custom lengths available |
| Surface Finish | Bright / Polished |
| Straightness | ≤ 0.5mm/m |
| Standards | GB, ASTM A108, JIS, DIN |
| Heat Treatment | Can be quenched & tempered (custom) |
Material Comparison
| Material | Tensile Strength | Wear Resistance | Best For |
|---|---|---|---|
| 4140 | High | High | Automotive parts, heavy machinery |
| SCM440 | Very High | Very High | Excavator components, high-load shafts |
Applications
Automotive transmission shafts and gears
Heavy machinery spindles and components
Hydraulic cylinder piston rods (base material)
Excavator and mining equipment parts
High-strength bolts and fasteners
Precision engineering and tooling
Agricultural and construction machinery
Why Choose YaDa Alloy Steel Cold Drawn Bars?
Higher Performance — Significantly stronger and more wear-resistant than carbon steel
Full In-House Production — From raw material to finished cold drawn bar
Strict Quality Control — 100% inspection plus mechanical testing
Customization Available — Special sizes, lengths, and heat treatment
Fast Delivery — Popular sizes in stock, custom orders within 15–25 days
Get Your Custom Quote Today
We offer free samples for qualified bulk orders.
Contact us now for the best price and fast delivery!
Email: [email protected]
Tel: +86 13920216030
