How to improve the hardenability of TB/T 1979 atmospheric corrosion resisting steel

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Weathering steel plate refers to the low alloy structural steel with protective rust layer and atmospheric corrosion resistance, which can be used to manufacture steel structures such as vehicles, bridges, towers, containers, etc. Compared with TB/T 1979 atmospheric corrosion resisting steel, ordinary carbon steel, weathering steel has better corrosion resistance in the atmosphere. Compared with stainless steel, weathering steel has only a small amount of alloy elements, such as phosphorus, copper, chromium, nickel, molybdenum, niobium, vanadium, titanium and so on. The total amount of alloy elements only accounts for a few percent, instead of more than 10 percent as stainless steel, so the weathering steel price is relatively low.

Q295GNH steel chemical composition: C: 0.14～0.19, Si: ≤0.30, Mn: 1.00～1.30, P: ≤0.025, S: ≤0.025, Cr: 0.80～1.10
Q295GNH mechanical properties:
Tensile strength σb (MPa): 880-1180
Yield strength σ0.2 (MPa): 635
Elongation δ5(%): 9
Reduction of area ψ(%): 35
Impact toughness value αku (J/cm2): 34

Due to other non-steel quality reasons caused by the customer dissatisfaction, to timely explain to the customer, and help them solve the problem, for the customer really because of their own reasons, to give patient reply.The process of objection handling is the process of our technical service.