304 stainless Square Pipes Steel (Tubing)Material :201,202,310s,304,430,316,309,321 etc ... :6.0-12mm Thickness:0.3-3.0mm 304 stainless Square Pipes Steel (Tubing) Material304 stainless steel pipeStandardA213, A312, ASTM A269,ASTM ASTM ... %≥30%≥35%≥35%Hardness (HV)<105<100 <90<90Pipe Picture (Square pipe)Pipe Picture (Round pipe) 304 stainless Steel Square Pipes