42CrMo4 4140 Alloy Steel Round Bar with Polished Surface and OD 6-630mm for High Toughness Applications
Price:
US $630-1,250 / Ton
MOQ:
1 Ton
Delivery Time:
Negotiable
Product Description
Forged Alloy Steel Round Bar 42CrMo4 / 4140
42CrMo / 4142 SCM440 steel bar stock, hot rolled alloy steel round bar manufactured to ISO9001 standards with flexible MOQ and prompt delivery within 7 days from stock. Material test certificates available per DIN10204 3.1/3.2.
Equivalent Grades
| GB | DIN | AISI | JIS |
|---|---|---|---|
| 42CrMo | 1.7225 | 4140 | SCM440 |
Chemical Composition
| C | Si | Mn | Cr | Mo | P | S |
|---|---|---|---|---|---|---|
| 0.38-0.43 | 0.40max | 0.60-0.90 | 0.90-1.20 | 0.15-0.30 | ≤0.035 | ≤0.035 |
Product Specifications
Available Sizes
- Round steel bar: 60-800mm
- Flat steel bar: 25-400mm × 200-800mm
Surface Condition
- Black surface
- Grinded
- Machined
Hardness
- Annealed HBS 217 max
Applications
42CrMo / 4140 Steel Round Bar is used to produce components with high requirements on toughness, including gear wheels, pinions, connecting rods, and parts for mechanical engineering applications.
Heat Treatment Guidelines
| Process | Specifications |
|---|---|
| Forging | Heat to 1150°C. Hold until uniform. Minimum forging temperature 850°C. Cool slowly in ashes or sand. |
| Annealing | Heat to 830°C-850°C. Cool in furnace. |
| Normalising | Heat to 870°C-900°C. Cool in still air. |
| Stress Relieving | Annealed: Heat to 600°C-650°C. Hardened: Heat to 500°C-550°C. Cool in still air. |
| Hardening | Heat to 830°C-880°C. Quench in oil or polymer. |
| Tempering | Heat to 450°C-700°C cool in still air. NB. Tempering within the range 200°C-420°C will result in temper brittleness and should be avoided. |
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Location
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
Contact Person
Gao Ben