Standing at a new historical starting point, we adapt to the requirements of supply side structural reform, adhere to the overall strategy of "innovation driven, quality leading, ASTM A709 structural steel sheet quality improving and efficiency increasing, transformation and development", and constantly improve the development concept and development level with a forward-looking vision and grand vision. Now we have been ranked the ASTM A709 structural steel sheet International leading steel materials supplier.
Design of smelting composition and smelting process of SN400A, SN400B, SN400C steel, ASTM A709 structural steel sheet product: The smelting process adopts low-sulfur molten iron and low-sulfur scrap on the basis of the general process flow of steel for export, adding the refining process of LIIF furnace deep desulfurization and SiCa treatment. In this way, the sulfur content in the steel can be reduced, and the sulfide in the steel can be modified. Greatly improve the toughness of steel and improve the casting performance of molten steel, and increase the qualification rate of the tundish temperature to ensure smooth casting.
There are many advantages of ASTM A709 structural steel sheet, pickling coils. The surface of pickling coil is smooth, and the outside is very beautiful. From the appearance, we can see how the manufacturer's technology is, and it is convenient to use pickling coils in engineering. In addition, the cost can be reduced by using pickling coil instead of cold rolled sheet. The corrosion resistance of pickling coil is better than ordinary steel plate, and its service life is also very long.
Quenching is a heat treatment process in which steel parts are heated to above the critical temperature, and after proper heat preservation, the parts are quickly cooled to room temperature in water or oil, so that martensite transformation occurs. The hardness of the quenched ASTM A709 structural steel sheet increases sharply. Quenching is to prepare the organization for adjusting and improving the performance of ASTM A709 structural steel sheet during tempering, while tempering determines the performance and life of the workpiece.
A387 Gr 91 Cl 1 alloy steel is an option for use in sour service environments. The material has good weldability and with its heat resistant qualities, the material is a highly versatile steel which can be used in numerous applications.
A387 Gr 91 Cl 1 steel tensile requirements
Tensile strength, ksi [MPA]: 85 to 110 [585 to 760]
Yield strength, min, ksi [MPa]/(0.2% offset): 60 [415]
Elongation in 2 in. [50mm], min, %: 18
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