hsla grade 50 material properties manufacturer

Generally, the production process of seamless steel tube can be divided into cold rolling and hot rolling. The production process of cold-rolled seamless steel tube is generally more complicated than that of hot rolling. The tube blank must be first rolled by three rolls, and then be subject to sizing test and cutting after extrusion. Then enter the annealing process. In appearance, the cold-rolled seamless steel tube is shorter than the hot-rolled seamless steel tube, and the wall thickness of the cold-rolled seamless steel tube is generally smaller than that of the hot-rolled seamless steel tube, but the surface looks brighter than the thick wall seamless steel tube, the surface is not too rough, and the diameter is not too much burr.

Cold formed hot rolled automotive structural steel QSTE420TM plate
Material/brand: QSTE420TM
Executive standard: Q/BQB 310
Chemical composition (melting analysis)%
Carbon: ≤0.12, Silicon: ≤0.35, Manganese: ≤1.50, Phosphorus: ≤0.05, S: ≤0.025, Titanium: ≤0.22, Niobium: ≤0.09, Aluminum: ≥0.01
Mechanical properties
Yield strength MPa: ≥420
Tensile strength MPa: 480-620
Elongation: ≥21

The company has passed the ISO9001: 2008 quality system certification, strictly implemented the ISO9001 quality management system Besides, we have continuously improved the after-sales service network to make every effort to provide more convenient, accurate and faster services for all customers We will supervise the production, control the quality in the factory, Inspect the cargo before shipment, Issue the test report to sales department From the steel prodcution to steel delivery, we always focus the whole process,hsla grade 50 material properties.

The company will regularly hold the award ceremony for excellent employees. he award-winners prove their excellence and the team’s excellence with great achievements.On Oct., 2018 the Management star is Ms. Sherry from International Trade Department. The sales star is Ms. Katrina from International Trade Department. Under the guidance of Ms. Sherry, the old customer maintenance team of BBN steel completed 309% sales task in Oct., 2018. Ms. Katrina has been using her own actions to interpret the "pursuit of excellence, continuous innovation" spirit of BBN enterprise.