difference between sm490a and sm490b

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sus 410j1 a131 d steel price hardox 450 tensile EN 10025 Steel Equivalent ST37 en 10025 s355j2 hardness q235nh specs s420n steel mill a537 class 1 steel instructions astm a131 grade a 00Cr17Ni14Mo2 advantages a709 grade 50 material ss490 equivalent material d40 steel 30CrMnSi welding astm a36 definition s420j0 steel equivalent ASTM A572GR65 ss400 material astm a131 steel grade dh36 st52-3 meaning S355J2W thickness ah36 steel comparative s235jr steel usa equivalent astm a 537 IS LOW TEMP STEEL PDF composition rst 37-2 sheet steel S355 mc is a36 steel a ductile material 42crmo(s)4 a ss 430 p460nl1 welding q345d vs q345b 40cr composition acero astm a572 gr 50 a387 grade 5 class2 steel form japanese material ss400 equivalent a572 grade 50 steel carbon percentage S355J2G2 00Cr17Ni14Mo2 mill api 5l x52 equivalent yield strength ss400

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