How to distinguish the normal floating rust and rusting of GB/T 4171 grade Q235NH alloy steel sheet

Home > FAQ

How to distinguish the normal floating rust and rusting of GB/T 4171 grade Q235NH alloy steel sheet

In recent years, in line with the development trend of iron and GB/T 4171 grade Q235NH alloy steel sheet steel industry at home and abroad, we have accelerated the transformation of development mode, promoted structural adjustment, and formed a rich product series of medium and thick plates, hot rolled steel coils, profiles, steel pipes, etc., which GB/T 4171 grade Q235NH alloy steel sheet are widely used in automobiles, long-span bridges, railways, machinery, ocean and so on fields. Meanwhile, we also provide deep processing for the steel materials.

GB/T 4171 grade Q235NH alloy steel sheet smelting method
The smelting process of electric furnace + external refining and vacuum degassing can be used for secondary electroslag remelting smelting. The steel plate should be intrinsically fine-grained steel, belonging to the 1.25Cr-0.5Mo series of pearlite heat-resistant steel, with good high-temperature strength, oxidation resistance, and sulfide corrosion resistance below 500°C. It is widely used in coal chemical industry and petroleum High temperature and high pressure vessel installation in the chemical industry.

GB/T 4171 grade Q235NH alloy steel sheet, Wear-resistant steel plate has good connection performance:
The base material of the wear-resistant steel plate is ordinary Q235 steel plate, which ensures the toughness and plasticity of the wear-resistant steel plate, and provides strength against external forces. Wear-resistant steel plate can be connected with other structures by various methods such as welding, plug welding, and bolt connection. The connection is firm, not easy to fall off, and the connection mode is more rich than other materials.

In the past, GB/T 4171 grade Q235NH alloy steel sheet, NM360 wear-resistant steel plates generally do not add tungsten. However, after adding the alloying element tungsten, the carbides distributed along the grain boundaries are greatly reduced, the acicular carbides in the crystal disappear, and there are a large number of granular carbides in the crystal. Tungsten reduces the precipitation of carbides and is spherically dispersed in the austenite crystals, which is beneficial to improve the strength and toughness of the NM360 wear-resistant steel plate.

Weathering steel GB/T 4171 grade Q235NH alloy steel sheet inventory: 22*3400*13000, 23.1*2590*7790, 25*1600*9300, 25*1600*9500, 25*2400*8200, 30*1600*10720, 30*1600*8600, 31.2*2950*9380, 31.9*2920*9420, 32*2500*6000, 34*1900*12000, 38*3300*13400, 60*1750*9100, 70*2260*7240, 70*2260*7700, 70*2260*7950, 70*2270*7000, 70*2270*7350, 70*2270*7600, 70*2500*12000, 75*2390*4320, 80*2200*10000, 80*2250*8850.

SG255 gas cylinder GB/T 4171 grade Q235NH alloy steel sheet steel is widely used in petroleum, chemical industry, power station, boiler, etc, used to make the reactor, heat exchanger, separator. The company is a professional gas cylinder steel exporter and a steel stockist in china. We keep more than 1000 tons SG255 gas cylinder steel coils in GB/T 4171 grade Q235NH alloy steel sheet stock every month. If you want to get the steel price, please do not hesitate to contact us. Any need in SG255 Chemical Composition and Mechanical Properties, please feel free to contact us by email or calling to us.

The after-sales service personnel understand the user's ideas and needs in detail, and stand on the other side's position and interests. Actively communicate with users and help them solve practical problems. This not only solves the service problem, but also improves the customer's trust in the company.

Ask for the instant quotation