Super austenitic stainless steel seamless pipes - Super austenitic stainless steel seamless pipes

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ASTM A312	Seamless and welded austenitic stainless steel pipes
ASTM A213	Seamless ferritic and austenitic alloy steel tubes for boilers, superheaters and heat exchangers
ASTM A269	Seamless and welded austenitic stainless steel pipes for general equipment
ASTM B677UNS N08904，N08925，N08926	Seamless nominal pipes and tubes