Steel Grade (钢级):

10#,20#,35#,45#,Q345B,ST35(E235),ST45(E255), ST52(E355),SAE1010,SAE1020,SAE1035,SAE1045, SAE4130, SAE4140,etc.

Standards(标准):

国标:GB/T3639

欧标:EN10305-1,EN10305-4

美标:ASTM A519,AMS-T-6736

日标:JIS G3445,etc.

Size Range(尺寸范围):

OD(外径范围):12-80mm WT(壁厚范围):0.7-12mm