These are low carbon steels which consists of an additional alloying ingredient, to provide a specific required property in the steel, such as strength or wear resistance or corrosion resistance. The various ingredients includes chromium, silicon, manganese, nickel and vanadium.
We usually work with AISI 4130, AISI 4140, AISI 4330, AISI 4340 used for structural applications.
The grades used for industrial fasteners are also known as
|Carbon Steel : ASTM A307 – Grade A/ B / C ; A194 – Grade 2 / 2H / 2HM / 4 / 7 / 7M / 8 / 8M
Alloy Steel : ASTM A193 – B7 / B8 / B8M Class 1 & B8 /B8M Class 2) / A320 – Grades L7, L43, B8 Class 1, B8 Class 2, B8M Class 1 & B8M Class 2 / ASTM A449 & A563 & ASTM A325
High Tensile : Grade 4.6 & 4.8 (Mild Steels) to High Tensile grades such as 6.8, 8.8, 10.9 & 12.9