40Cr Seamless Alloy Steel Tube is a high-strength, chromium-containing low-alloy steel pipe manufactured through the seamless process. It offers excellent comprehensive mechanical properties, including high tensile strength, good toughness, and superior wear resistance. After quenching and tempering heat treatment, its performance is significantly enhanced. This makes it an ideal choice for critical applications such as automotive transmission parts, high-stress mechanical components, and hydraulic cylinders.
- Alloy Seamless tube, Seamless Pipe
GB/T 3077-2015 Seamless Alloy Steel Pipe Grade 40Cr
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Product Detail
Chemical Component
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Product Name:
GB/T 3077-2015 Seamless Alloy Steel Pipe Grade 40Cr
Standard:
GB/T 3077-2015; GB/T 8162-2018
Grade:
40Cr
Thickness:
3-75mm
Section Shape:
Round
Outer Diameter:
32-630mm
Place of Origin:
Baotou, China(Mainland)
Usage:
Automotive transmission parts, high-stress mechanical components
Surface Treatment:
Hot Rolled
Tolerance:
OD: 32-50mm ±0.5mm; 50-630mm ±1.0%D WT: ≤3mm ±12.5%S; >3mm ±10%S
End:
Plain, beveled, or customized
End Protector:
Plastic pipe caps,iron protector or customized
length:
6-12m or customized
Brand:
Baotou steel
Delivery Time:
Normally within 30-45 days and according to the quantity.
Chemical Component（GB/T 3077-2015）
| Grade | Type | C | Mn | Mo | Cr | Ni | Cu | P | S | Si | ||||
| Min | Max | Min | Max | Min | Max | Min | Max | Max | Max | Max | Max | Max | ||
| 40Cr | – | 0.37 | 0.44 | 0.50 | 0.80 | – | – | 0.80 | 1.10 | 0.035 | 0.035 | 0.37 | ||
Mechanical Performance（GB/T 3077-2015）
| Grade | Type | Total under load Elongation % | Yield Strength | Tensile Strength | Hardness | Specified OD
mm | Allowable hardness Variation | ||
| Min | Max | Min | HRC | HBW | HRC | ||||
| 40Cr | – | 9 | 785 | – | 980 | – | – | – | – |
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