1、 Brief introduction of 35 # steel plate: 35 # steel plate has good plasticity and appropriate strength, good process performance and acceptable welding performance, and is mostly used in the normalized and quenched and tempered state.

2、 Use of 35 # steel:

35 # steel is widely used in manufacturing various forgings and hot-pressed parts, cold-drawn and upset forged steel, seamless steel pipes, and parts in mechanical manufacturing, such as crankshaft, shaft, pivot pin, lever, connecting rod, beam, sleeve, rim, washer, screw, nut, etc.

3、 Chemical composition of 35 # steel:

Carbon C: 0.32 ～ 0.40

Silicon Si: 0.17 ～ 0.37

Manganese Mn: 0.50-0.80

Sulfur S: ≤ 0.035

Phosphorus P: ≤ 0.035

Chromium Cr: ≤ 0.25

Nickel Ni: ≤ 0.25

Copper Cu: ≤ 0.25

4、 Mechanical properties of 35 # steel:

Tensile strength σ b (MPa)：≥530(54)

yield strength σ s (MPa)：≥315(32)

Elongation δ 5 (%)：≥20

Reduction of area ψ  (%)：≥45

Impact energy Akv (J): ≥ 55

Impact toughness value α kv

(J/cm ²)：≥ 69(7)

Hardness: not heat treated ≤ 197HB

Sample size: 25mm

National standard for technical performance: GB699-1999

5、 Difference between 35 # steel and 45 # steel

45 # steel is a high-quality carbon structural steel, its strength is 61, HRC is 48-55, and it is widely used in machinery; No. 35 is also a high-quality carbon structural steel, but its strength is only 54 and HRC is 38-45.