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• Alloy steels are designated by AISI four- digit numbers. They are more responsive to mechanical and heat treatments than carbon steels. They comprise different types of steels with compositions which exceed the limitations of B, C, Mn, Mo, Ni, Si, Cr, and Va in the carbon steels.
• AISI 4130 alloy steel contains chromium and molybdenum as strengthening agents. It has low carbon content, and hence it can be welded easily. The datasheet given below provides more details about AISI 4130 alloy steel.
Weldability
AISI 1020 can be welded by performing the most common welding processes. In the cold drawn or turned and polished condition, it has better weldability. It has been suggested that the welding process should not be performed in heat treated or
carburized condition.
• Applications
AISI 1020 steel is used in case hardened condition. The applications of AISI 1020 steel are:
• axles
• general engineering parts & components
• machinery parts
• shafts
• camshafts
• gudgon pins
• ratchets
• light duty gears
• worm gears and
• spindles