Alloy Steel Pipes
Alloy steel contains substantial quantities of elements other than carbon such as nickel, chromium, silicon, manganese, tungsten, molybdenum, vanadium and limited amounts of other commonly accepted elements such as manganese, sulfur, silicon, and phosphorous. Addition of such alloying elements is usually for the purpose to increase hardness, strength or chemical resistance.
astm a209 t1, t1a, t1b (standard specification for seamless carbon-molybdenum alloy-steel boiler and superheater tubes
astm a213 t2, t5, t5b, t5c, t9, t11, t12, t17, t21, t22, t23, t24, t36, t91, t92, t122, t911 (standard specification for seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes)
astm a250 t1, t1a, t1b, t2, t11, t12, t22 (standard specification for electric-resistance-welded ferritic alloy steel boiler and superheater tubes)
astm a335 p1, p2, p5, p5b, p5c, p9, p11, p12, p15, p21, p22, p23, p24, p36, p91, p92, p122, p911(standard specification for seamless ferritic alloy-steel pipe for high-temperature service)
astm a369 fpa, fpb, fp1, fp2, fp5, fp9, fp11, fp12, fp21, fp22, fp91, fp92 (standard specification for carbon and ferritic alloy steel forged and bored pipe for high-temperature servie)
astm a691 cm65, cm70, cm75, cmsh70, cms75, cmsh80, ½ cr, 1cr, 1¼ cr, 2 ¼ cr, 3cr, 5cr, 9cr, 91 (standard specification for carbon and alloy steel pipe, electri-fusion-welded for high-pressure service at high temperatures)