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The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger. It is also an 9Cr-1Mo-V alloy steel with UNS designation K90901. Compared to its equivalent ASTM A335 P91, the chemical composition requirement of T91 steel is …

P91 is one of the steel grades specified by ASTM A335, the standard specification for seamless ferritic alloy steel pipe for high-temperature service. The maximum allowable stress in different temperature ranges shall be determined by ASME B31.1 and ASME B31.3 …

Designated as UNS K91560, the T91/ P91 steel is a 9Cr-1Mo ferritic alloy steel with deliberate addition of vanadium and niobium, as well as controlled nitrogen content. It has outstanding heat-resistance and creep strength. It also has good resistance to …

1. General Tolerances for All Fittings of ASME B16.9 *All dimensions are in mm unit. NPS: Nominal Pipe Size; DN: Nominal Diameter. *O.D: outside diameter at bevel; I.D: inside diameter at end; Both P & Q are angularity tolerances. *A …

Designated as UNS K11597, ASTM A335 P11, is also known as 1.25Cr-0.5Mo. Generally, its minimum tensile strength and yield strength are respectively 415 MPa and 205 MPa at room temperatures. However, its tensile & yield strength values in different elevated …

Due to the poor weldability and cold-cracking susceptibility, there is high risk of cold cracking during the welding of ASTM A335 P11 seamless pipes. Several special measures shall be taken during the welding process and relative inspection shall be conducted …

The welding qualification records(WQR) for ASTM A335 P11 seamless pipes shall be made in accordance with ASME Section IX and JB 4708. It covers tensile test, bending test, impact test and hardness test for the base metal, welding seam and heat affected …

Project Overview In an ethylene production capacity-expansion project of SINOPEC, thick-wall ASTM A335 P11 seamless pipes are required for the high-pressure steam pipeline distributed in several working zones. ASTM A335 P11 is a ferritic low alloy steel grade for high …

UNS S31803 is a typical duplex stainless steel very similar to UNS S32205 except that it may have a bit lower content requirement of chromium, molybdenum and nitrogen. Generally, both UNS 31803 and S32205 can be called as “Duplex 2205” in practice. …

As a modified version of SS304, stainless steel 321 (SS321) is a stabilized austenitic stainless steel with a titanium addition of at least 5 times the carbon content. The titanium addition reduces or prevents the sensitization of carbide precipitation during …

Stainless steel 317 (SS317) is a modified version of stainless steel 316 (SS316) with higher molybdenum (Mo) addition to improve the pitting-corrosion resistance as well as enhance its strength. Stainless steel 317L (SS317L) is the low carbon version of SS317 …

Stainless steel 316 (SS316) is an austenitic chromium-nickel stainless steel containing deliberate amount of molybdenum which increases general corrosion resistance and especially improves its pitting resistance to chloride ion solutions. The molybdenum addition also provides increased strength at elevated temperatures. …