As a high-performance alloy steel material, 4140 round steel is known for its good strength, hardness and toughness.Due to its excellent mechanical properties and processing performance, 4140 round steel is widely used in aerospace, automobile, petrochemical and other industries, mainly used for manufacturing engineering parts, mechanical components and shaft parts.
Relying on our mature manufacturing process and strict quality system management, we are able to provide customers with high-quality products. 4140 round steel, as our core product, we are more confident in providing customers with a one-stop solution.
Full Sizes of 4140 Round Steel – All you need is here
- 4140 Cold Drawn Round Steel Bar
| Available Size,mm | Length,m | Tolerance,mm |
| Φ4-Φ100mm | 3-8m,Customizable | h11,Negotiable |
- 4140 Hot Rolled Round Steel Bar
| Available Size,mm | Length,m | Tolerance,mm | |
| Black | Bright | ||
| Φ14-Φ300mm | 5.8m/6m/8.1m,Customizable | 0/+1mm,Negotiable | H11,Negotiable |
- 4140 Hot Forged Round Steel Bar
| Available Size,mm | Length,m | Tolerance,mm | |
| Black | Bright | ||
| Φ80-Φ1200mm | 3-10m,Customizable | 0/+5mm,Negotiable | 0/+3mm,Negotiable |
Various Delivery Condition For 4140 Round Steel-Meet customers’ customized requirements
Heat Treatment
- Quenched and Tempered (+QT)
- Normalizing (+N)
- Annealing (+A)
- Stress Relieving-SR
Surface Finish Processing
- Rough machining
- Peeling
- Grinding
- Polishing
- Milling
Pre Hardened 4140+QT Round Steel Bar-Sincerely look forward to cooperating with you
- 2500+tons Full Size Stock: From Φ14 to Φ300 mm
- Full Inch Size Supply With Bright surface: From 3/8″ to 40″
- Pre-hardened Hardness:28-34HRC
- Diameter Tolerance: Best H11
- Straightness: ≤3mm/m
- Fast Deliver: Rolled with 7-10 days available, Forged with 30 days available.
