The BBNSTEEL company has the first-class qualification for steel structure professional contracting, integrating production, design and installation, and can undertake various steel structure projects. The product has a wide surface, flat and smooth surface, and neat trimming. It has users in more than 10 provinces and cities in China and is exported to the United States, Canada, Japan, Europe, Southeast Asia and other countries and regions.
As we all know, steel pipes occupy more space in the process of transportation. If there is no good way of packing, the transportation cost for steel pipes will be a big expense. In view of this characteristic, our company is ingenious and adopts the nest package method to solve this problem perfectly. The premise of the nest package is that the diameters of the steel pipes are different, and the small diameter pipe is inserted in the large diameter pipe. This not only saves the volume, but also saves the transportation cost. It also reduces the loading and unloading workload by half, saves precious time, and enables customers to receive goods earlier.
Normalizing is to heat the steel parts to 30~80℃above the critical temperature for a period of time. Then the parts are taken out of the furnace and cooled in air. Since the cooling rate of normalizing is faster than that of annealing, the strength and hardness of normalized ASTM A573 CS steel carbon plate are higher than that of annealed ASTM A573 CS steel carbon plate, but the elimination of internal stress is not as good as annealing. The normalizing operation of ASTM A573 CS steel carbon plate is simple, the cost is low, the productivity is high, and it is widely used in actual production.
In January 2019, one of our Vietnam customer purchased 395.62 tons Q345B steel plate ASTM A573 CS steel carbon plate for their construction project, we prepared all the goods ready within 5 days, and supplied the goods with painting sand blasting to SA2.5 ASTM A573 CS steel carbon plate and priming gray oxide primer, and arrange shipment in time. Meet the customer urgent delivery request.
40Cr grade under GB/T 3077-2015 standard is a alloy steel bar material. ASTM A573 CS steel carbon plate, 40Cr alloy chemical composition (C: 0.37 ~ 0.44, Si: 0.17 ~ 0.37, Mn: 0.50 ~ 0.80, Cr: 0.80 ~ 1.10, Ni: ≤0.30, P: ≤0.030, S: ≤0.030, Cu: ≤0.30, Mo: ≤0.10). Heat treatment: First quenching heating temperature (℃): 850; coolant: oil; Temperature heating temperature (℃): 520. 40Cr steel tensile strength (σb / MPa): ≥980. Yield point (σs / MPa): ≥785
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