... .5-2.0mm Q195-Q235 black annealed/bright Black annealed cold rolled steel pipeStandard: BS 1387, BS 1139, BS EN10025, BS EN ... , Q195... Grade: 20#, 16Mn, A53(A,B), St37, St52, St42, S...Place of Origin: Tianjin China (Mainland) Secondary Or Not: Non ... Not: Non-alloy Certification: ISO9001-2000 Produc t nameBlack annealed cold rolled steel pipe Wall Thickness0.7mm-10mmStandardStandard: BS 1387, BS 1139 ...