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some features of Q235 steel

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Q235 is an ordinary carbon structure steel which is the material of steel. Q represents the material yield limit; 235 is referred to the material yield value about 235mpa. And with the increase of the material thickness, the yield value will reduce. Due to moderate carbon content, Q235 has good comprehensive performance as well as good strength, plasticity and welding performance and wide applications.
Thickness/Diameter≤16mm, Yield strength: 235MPa;
16mm<Thickness/Diameter≤40mm, Yield strength: 225MPa;
40mm<Thickness/Diameter≤60mm, Yield strength: 215MPa;
60mm<Thickness/Diameter≤100mm, Yield strength: 205MPa;
100mm<Thickness/Diameter≤150mm, Yield strength: 195MPa;
150mm<Thickness/Diameter≤200mm, Yield strength: 185MPa;

ASTM A283 Steel Plate
Q235 steel plate

Q235A,Q235B,Q235C,Q235D,Q235E represents different grades, because impact of temperature is different. A refers to do not impact; B refers to above 20 degree; C refers to above 0 degree; D refers to above -20 degree. The sulfur content of A, B, C, and D are reducing; The phosphorus content of A and B are the same; The phosphorus content of C and D are the least.

Chemical Compositions (%)
Q235A: C ≤0.22%, Mn 0.3%-0.65%, Si ≤0.35%, S ≤0.050, P ≤0.045;
Q235B: C ≤0.20%, Mn 0.3%-0.7%, Si ≤0.35%, S ≤0.045, P ≤0.045;
Q235C: C ≤0.17%, Mn 0.35%-0.8%, Si ≤0.35%, S ≤0.040, P ≤0.040;
Q235D: C ≤0.17%, Mn 0.35%-0.8%, Si ≤0.35%, S ≤0.035, P ≤0.035;

Applications:
1. ASTM A283 steel is mainly used in construction and engineering structure for instance manufacturing rebar, factory workshop structure, high voltage power transmission tower, bridges, vehicles, boiler, containers ships etc. together with mechanical spare parts without low performance requirements.
2. Also ASTM A283 steel is applied to make punch material, through quenching tempering, Q235 can be used directly; hardness is 36~40HRC; this solves the punch fracture phenomenon in the use.

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