seamless s are used for the manufacture of seamless steel gas cylinders specified in JIS B 8230 and JIS B 8241。
JIS manufacture method:
(1) Manufactured in open-hearth furnace or electric furnace(Seamless).
(2) The tubes is manufactured with no heat treatment。
|STH11||0.50 max||0.10~0.35||1.80 max||0.035max||0.035max||-||-||-|
|Tolerance on outside diameter||Tolerance on wall thickness||Tolerance on wall thickness disparity||Tolerance on length|
|1%||+30%||Within 20% of the nominal wall thickness||>+30mm|
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