40Mn China Structural Steel
40Mn structural steel is a type of high-quality Chinese steel that is widely used in various industries. It is known for its strength, durability, and reliability, making it an ideal material for building structures, machinery, and equipment.
One of the key benefits of 40Mn structural steel is its exceptional mechanical properties. It has a high tensile strength and excellent toughness, which helps it withstand heavy loads and extreme conditions. It also has good weldability and machinability, making it easy to work with and shape according to specific requirements.
Moreover, 40Mn structural steel is a cost-effective option that offers long-lasting performance and requires minimal maintenance. It is highly resistant to rust and corrosion, ensuring the durability and longevity of structures built using this material.
The production of 40Mn structural steel adheres to strict quality control standards, ensuring that it meets the necessary specifications and requirements for various applications. Additionally, it has been tested and approved for use in a wide range of industries, including construction, manufacturing, and transportation.
1. Chemical composition: Chemical composition includes carbon (C) 0.37-0.44%, manganese (Mn) 1.40-1.80%, silicon (Si) 0.17-0.37%, phosphorus (P) no more than 0.035%, sulfur (S) no more than 0.035%.
2. Mechanical properties: mechanical properties are very excellent, the commonly used tensile strength is 590-830MPa, the yield strength is not less than 365MPa, and the elongation is 15-20%.
3. Heat treatment: Excellent performance is achieved through heat treatment. Common heat treatment methods include normalizing and annealing. Normalizing can improve the hardness and wear resistance of steel, and annealing can improve the plasticity and toughness of steel.
4. Application fields: Used in the manufacture of large machines, construction machinery, railway vehicles and other parts requiring high strength and corrosion resistance.
| Proof strength Rp0.2(MPa) |
Tensile strength Rm(MPa) |
Impact energy KV(J) |
Elongation at fracture A(%) |
Reduction in cross section on fracture Z(%) |
As-Heat-Treated Condition | Brinell hardness(HBW) |
|---|---|---|---|---|---|---|
| 362(≥) | 948(≥) | 43 | 12 | 13 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 143 |
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J/kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 372(≥) | 355(≥) | 12 | 11 | 23 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 244 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0)N/mm2 |
Creep rupture strength (10000h) (Rp1,0)N/mm2 |
|||||
| 572 | 239 | 243 |
| Product type | Products | Dimension | Processes | Deliver Status |
|---|---|---|---|---|
| Plates/Sheets | Plates/Sheets | 0.08-200mm(T)*W*L | Forging,hot rolling and cold rolling | Annealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting |
| Steel Bar | Round Bar,Flat Bar,Square Bar | Φ8-1200mm*L | Forging,hot rolling and cold rolling,Cast | Black,Rough Turning,Shot Blasting, |
| Coil/Strip | Steel Coil/Steel Strip | 0.03-16.0x1200mm | Cold-Rolled&Hot-Rolled | Annealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting |
| Pipes/Tubes | Seamless Pipes/Tubes,Welded Pipes/Tubes | OD:6-219mm x WT:0.5-20.0mm | Hot extrusion,Cold Drawn,Welded | Annealed,Solution and Aging,Q+T,ACID-WASHED |
| Grade | Standard | Country | Application |
|---|---|---|---|
| X40MnCr18 | GBT | China |
Non magnetizable steels. Technical delivery conditions |
| 1.3817 | GBT | China |
Non magnetizable steels. Technical delivery conditions |
Hot Tags: 40mn china structural steel, China 40mn china structural steel manufacturers, suppliers, factory, 45Mn Carbon Steel Round Bar, 20Mn Carbon Steel Plate, 40Mn Hot Rolled Steel Plate, Chain Steel
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