duplex steels are characterised by high chromium (19–28%) and molybdenum (up to 5%) and lower nickel contents than austenitic stainless steels. the most used duplex stainless steels are the 2205 (22% chromium, 5% nickel) and the 2507 (25% chromium, 7% nickel); 2507 is known as “super duple

martensitic stainless steel, a chromium-iron alloy containing 10.5 to 17% chromium and controlled amounts of carbon. this type is extremely strong and tough, but not as corrosion resistant as the other two classes. martensitic grades are magnetic in both the annealed and hardened (heat tre

ferritic steel is a grade of stainless steel alloy that contains over 12% chromium. it differs from other forms of stainless steel in two critical regards: its molecular grain structure and its chemical composition.ferritic stainless steel is actually defined as a stra

api 5l/astm a106 gr.b, seamless carbon steel pipe

api 5l gr.b/astm a53

inconel 718 is a gamma prime strengthened alloy with excellent mechanical properties at elevated temperatures, as well as cryogenic temperatures. suitable for temperatures upto around 1300°f. can be readily worked and age hardened.excellent strength from -423°f to 1300

hardening: hardening is a metallurgical metalworking process used to increase the hardness of a metal. the hardness of a metal is directly proportional to the uniaxial yield stress at the location of the imposed strain. a harder metal will have a higher resis

china oil & gas pipeline network corp, the country39;s largest energy infrastructure company, said it has started tunneling through the yangtze river for its china-russia east-route natural gas pipeline on last tuesday, marking new progress in the two countries39; energy cooperation to improv

astm a420 covers wrought carbon steel and alloy steel pipe fittings of seamless and welded construction for use in pressure piping and pressure vessel service at low temperatures. materials shall consist of forgings, bars, plates, seamless or fusion welded tubular products with filler meta

recently, steel prices have continued to rise and have risen crazily. the main reasons are as follows:first. as we all know, on april 26, the ministry of finance of the people’s republic of china issued an announcement on the cancellation of export tax rebates for cert

inconel 600 is a chromium-nickel alloy designed for use at temperatures up to 2000°f and down to as low as cryogenic levels. the alloy is resistant to reducing environments as well as chloride stress corrosion cracking due to its nickel content and resistant to weaker oxidizing conditions

api 5l/astm a106 gr.b, seamless carbon steel pipe

api 5l/astm a53 gr.b (hot rolled erw steel pipe)outside diameter

api 5l/astm a53 gr.b (hot expanded erw steel pipe)

alloy 625 is a popular nickel-chromium alloy that offers users a high level of strength and ease of fabrication. alloy 625 is known for a number of different unique properties including:strength due to addition of molybdenum and niobium

china will adjust tariffs on some steel products to lower import costs as part of efforts to push the industry39;s upgrading and transformation.starting on may 1, china will apply a provisional zero import tax rate on pig iron, crude steel, recycled steel raw materials, and ferrochrome, th

api 5l/astm a53 gr.b (hot rolled erw steel pipe)outside diameter