All steel pipes operated by our company are in compliance with national standards, and the original bill of materials of steel mills is attached. At the same time, we supply the seamless steel pipe, electrical Resistance Weld pipes, large diameter welded pipes ordering business of various specifications and materials and the railway and road transportation business for the majority of users.
After quenching and tempering, 40Cr alloy steel plate and shipbuilding use GL-D hull structural steel sheet have good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity. The hardenability of steel is good. It can be hardened to Ф28 ～ 60mm during water quenching and Ф15 ～ 40mm during oil quenching. In addition to quenching and tempering, this steel is also suitable for cyanidation and induction hardening. The cutting performance is better. When the hardness is HB174 ～ 229, the relative cutting workability is 60%. 40Cr alloy steel is suitable for making medium-sized plastic molds.
Shipbuilding use GL-D hull structural steel,Titanium microalloying is an element of strengthening complex with carbon and nitrogen. The addition of micro amount of titanium in the steel can fix almost all nitrogen and part carbon in the steel, so as to eliminate the strain aging phenomenon and improve the aging impact performance of the steel. At the same time, it can refine the grains and change the morphology of the compounds. According to the atomic weight ratio of Ti and N in tin formula (Ti = 3.4n), the content of Ti in steel should be controlled between 0.015 and 0.025%. Generally, the amount of ferrotitanium added to each ton of steel is 1kg.shipbuilding use GL-D hull structural steel
Shipbuilding use GL-D hull structural steel,our company is leading supplier of API 5CT casing pipes in China. N80 oil casing pipes enjoy high size precision, good weld toughness, good extrusion resistance, easy quality control and low cost features. Welcome to our company to purchase API 5CT N80 and so on casing pipes.
As one of the large professional metallurgical manufacturers in China, the strength of the brand, quality assurance, professional after-sales Every day we are making unremitting efforts to challenge higher quality products and more satisfactory services Customer demand is our pursuit, and win customer satisfaction with quality BBN aftersales team is responsible to solve the problem of technical support and quality, service complaints,shipbuilding use GL-D hull structural steel.
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