Welded steel gas cylinders (GB6653-86) welding gas cylinders using high-quality carbon steel material structural steel and low alloy steel. Since the welding gas is used under some pressure, so the chemical composition and mechanical properties are more stringent control. Grade welded steel cylinders follow it with "HP" (welding bottles Pinyin initials) to show the difference. (1) The main purpose is mainly used for welding steel gas cylinders produce lower pressure cylinders, Hefei tread plate, such as heat treatment process and the organization of LPG bottles and heat treatment properties of the alloy hardened steel are generally direct quenching after carburizing, and then tempering. After the heat treatment, embossing plate, tissue surface carburized layer of alloy cementite + tempered martensite + small amount of residual austenite, hardness 60HRC ~ 62HRC. Heart tissue and hardenability and steel related parts cross-sectional dimension, tread plate factory, hardenability completely when low-carbon tempered martensite, hardness 40HRC ~ 48HRC; in most cases troostite, tempering Markov body and a small amount of ferrite, hardness 25HRC ~ 40HRC. Heart toughness are generally higher than 700KJ / m2. Hefei tread plate, exhibition of Commerce Bo, pattern steel plant network provided by the Hefei exhibition Bo Trading Company. Hefei tread plate, exhibition of Commerce Bo, pattern steel plant in Hefei Show Bo Trading Company (www.hfzhanbo.com) (www.hfzhanbo.com) this year introduced a new upgrade, the above picture is for reference only, please dial this page Phone or pictures on obtain the latest information, contact: Mr. Huang.