钢管a106b是什么材质

化学成分：
碳:<=0.3%
锰:0.29%~1.06%
磷:<=0.035%
硫:<=0.035%
硅:>=0.1%
铬:<=0.40%
铜:<=0.40%
钼:<=0.15%
镍:<=0.40%
钒:<=0.08%

a106b 属于美标标准无缝钢管，与中国20#标准一样。
a106b按生产方法不同可分为热轧管、冷轧管、冷拔管、挤压管等。

A106 Carbon Steel Pipes Seamless for high temperature service
Suffix A & B for Grade of Furnace welded -
for ref. only (PLS check ASTM Standard)
Pressure (psig) and temperature (deg F) ratings of A106 Grade B carbon steel pipes - temperatures ranging 100 oF - 750 oF
Ratings are given for standard seamless pipes at temperatures ranging 100 oF - 750 oF. Ratings in psig based on ANSI/ASME B 31.1.
钢种 中国GB 日本JIS 美国ASTM 德国
牌号 牌号 标准号 钢号 钢号 材料号 标准号
碳素钢管 20 STPG42 G3454 A315-B (St42) 1.013 DIN1626
A53-B St42-2 1.0132
STPT42 G3456 A106-B St45-8 1.0405 DIN17175
STB42 G3461 A106-B St45-8 1.0405 DIN17175
STS42 G3455 A178-C St45-4 1.0309 DIN1629/4