Steel 4815

Aging Procedure

Not applicable to this alloy.

Annealing Procedure

Anneal at 1575 F and slow furnace cool at a rate of less than 50 F per hour down to below 900 F and air cool from there.

Cold Workability

Ductility of this alloy in the annealed or normalized condition is good. Thus it may be readily cold worked by conventional methods.

Forgeability

Forge at 2150 F down to 1800 F.

Formability

Ductility of 4815 is good and it is readily formed by conventional methods with the alloy in the annealed or normalized condition.

Hardening Procedure

4815 will harden by cold work or by heat treatment. See "Heat Treatment" and "Tempering".

Heat Treatability

Normalize at 1700 F before doing any final heat treatment. Hardening, or carburizing, is done (after normalizing) at 1700 F followed by an oil quench.

Hot Workability

No data available - consult the alloy supplier for information, or advisability, of hot working.

Machinability

As with all of the low alloy steels the 4815 alloy may be readily machined in the normalized or annealed condition. In the hardened condition machining is difficult and is best limited to grinding.

Principle Design Features

AISI 4815 is a nickel, molybdenum containing low alloy steel capable of heat treating to good core strength and ductility. it is often used for carburizing to develop a hard, wear resistant, case.

Tempering Procedure

Tempering may be done at temperatures of 300 F to 1200 F depending upon the strength level desired. Consult the alloy supplier for data on strength levels at various tempering temperatures.

Weldability

The alloy is weldable, but no details are given. Consult the alloy supplier for information as to approved welding procedures, pre and/or post-heating.