Mechanical properties and chemical composition of 27SiMn alloy structural steel

Mechanical properties and chemical composition of 27SiMn alloy structural steel

27SiMn belongs to alloy structural steel, and the implementation standard: dance skills. The performance of this steel is better than that of 30Mn2 steel, with high hardenability, critical hardening diameter of 8~22mm in water, good machinability, medium cold deformation plasticity and weldability; In addition, the toughness of steel is not reduced much during heat treatment, but it has quite high strength and wear resistance, especially when water quenched, it still has high toughness; However, this steel is highly sensitive to white points, and has a tendency to temper brittleness and overheating during heat treatment.
2. 27SiMn mechanical properties sample blank size (mm): 25 tensile strength (σb/MPa): ≧980 yield point (σs/MPa):
≧835 elongation after fracture (δ5
/%): ≧12 section shrinkage (ψ/%): ≧40

impact absorption work (Aku2
/ J): ≧39
Brinell hardness (HBS100/3000) (annealed or high temperature tempered state): ≦217
III, 27SiMn Application:
This steel is mainly used in the quenched and tempered state to manufacture hot stamping parts that require high toughness and wear resistance; It can also be used in the state of normalized or hot rolled supply, such as track pins for tractors.

Chemical composition

Tabulation: Depu Steel Date: 2024-01-22

C	Si	Mn	P	S	Cu	Cr	Ni
0.24～0.32	0.24～0.32	1.10～1.40	≤0.035	≤0.035	≤0.30	≤0.30	≤0.30

Note:
(1): In order to improve the properties of steel, other trace alloying elements other than the above table can be added, and the data comes from the network and is for reference only.
(2): The allowable deviation of the chemical composition of the finished steel plate shall comply with the provisions of GB/T222