40Mn Steel Product in China
As a leading producer of steel products, China is home to a wide variety of high-quality materials. One of the most popular choices for manufacturing is 40Mn steel, which boasts excellent strength, durability, and versatility.
With its high carbon content and alloying elements, 40Mn steel is well-suited for applications that require superior toughness and resistance to wear. It is commonly used in the construction industry for manufacturing crane hooks, steel frames, and heavy machinery components. Additionally, it is frequently employed in the automotive industry for producing gears, axle shafts, and other parts that require high strength and hardness.
One of the main advantages of 40Mn steel is its ability to be heat-treated to improve its properties. By subjecting it to heat and quenching processes, 40Mn steel can increase its hardness, improve its wear resistance, and enhance its overall toughness.
Overall, the 40Mn steel product in China offers a reliable and cost-effective solution for industrial applications. Its superior properties and diverse range of uses make it an essential material for many manufacturers worldwide.
1. Chemical composition: C (carbon) : 0.37 ~ 0.44% and Si (silicon) : 0.17 ~ 0.37% and Mn (Mn) : 1.40 ~ 1.80%, S (sulfur) : 0.035% or less, P (P) : 0.035% or less. The chemical composition is the standard configuration in China and can meet the needs of most machinery manufacturing.
2. Mechanical properties: yield strength (σs) ≥600 MPa, tensile strength (σb) ≥800 MPa, elongation (δ) ≥16%. These values reflect the excellent strength and plasticity properties of 40Mn steel, making it widely used in the manufacture of high-load mechanical components.
3. Machining performance: can be welded, forged and cut, and has good processing performance, which helps forging manufacturers to carry out initial shape repair and further manufacture products of different shapes.
4. Application: mainly used in the manufacture of medium-load and low-speed core parts, such as shafts, wheels, flanges, etc. It is an important material in the machinery manufacturing industry such as cranes, machine tools, mining equipment, and agricultural machinery.
CHEMICAL COMPOSITION%OF THE LADLE ANALYSIS OF GRADE40MN
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | Cu(%) |
|---|---|---|---|---|---|---|---|
| 0.37-0.44 | 0.17-0.37 | 0.70-1.00 | 0.035 | 0.035 | 0.25 | 0.3 |
0.25 |
MECHANICAL PROPERTIES OF GRADE40MN
| 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) |
|---|---|---|---|---|---|---|
| 871(≥) | 263(≥) | 24 | 34 | 21 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 111 |
PHYSICAL PROPERTIES OF GRADE 40MN
| 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 |
|---|---|---|---|---|---|---|---|
| 238(≥) | 583(≥) | 43 | 33 | 22 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 313 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0)N/mm2 |
Creep rupture strength (10000h) (Rp1,0)N/mm2 |
|||||
| 581 | 658 | 737 |
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