Grade 20G
China ISC U50207
Corresponding Standard GB 5310-2008
Seamless Steel Tubes and Pipes for High Pressure Boiler
Classification Carbon Steel
20G Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo V
Minimum Value 0.17 0.17 0.35 - - - - - - -
Maximum Value 0.23 0.37 0.65 0.025 0.015 0.25 0.25 0.2 0.15 0.08
Approximate Comparison Table Seamless Steel Tubes and Pipes for High Pressure Boiler
China United States European Standard
GB ISC ASTM/AISI EN
20G U50207 SA-106 B
SA-210 A-l
P235GH
20G Corresponding Standards(Same grade name, different standards)

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