Stainless Steel 414
| Chemical Analysis | |
|---|---|
| C | Carbon 0.15max |
| Mn | Manganese 1.00 max |
| P | Phosphorus 0.040 max |
| S | Sulfur 0.030 max |
| Si | Silicon 1.00 max |
| Cr | Chromium 11.50 – 13.50 |
| Ni | Nickel 1.25 – 2.50 |
General Characteristics of Stainless Steel 414
This alloy is effectively a 410 type steel with a nickel addition. The nickel addition results in a steel that is tougher than 403/410 grades at similar strength levels.
Applications of Stainless Steel 414
This alloy is used in mining equipment as forged shafts and spindles, valve seats, fasteners, beater bars
Forging Stainless Steel 414
This alloy should be heated for forging to 2100/2200ºF (1150/1205ºC), then forged. Small forgings should be cooled slowly and large forgings in dry lime or ashes. Parts should be cooled to room temperature before post-forge annealing. Do not forge below 1650ºF (900ºC.)
Heat Treatment
Annealing
For optimum machinability, heat to 1200/1250ºF (650/675ºC), soak and air cool.
Hardening
Heat to 1800/1950ºF (980/1065ºC) – soak and oil quench or air cool. If tempering below 700ºF (370ºC) use the high side of the austenitizing temperature for the best toughness, and similarly the low side of the austenitizing temperature when tempering above 1100ºF (540ºC) for best toughness.
Tempering
Temper at a temperature to give desired mechanical properties. Soak at least one hour – longer for large parts – and air cool. Tempering between 700/1050ºF (370/565ºC) may result in lower toughness and corrosion resistance, but depending upon other required properties it may still be necessary to forsake some toughness and corrosion resistance. Experience will be the guide here.
Machinability
The alloy shows fairly good machinability, but there will be some gall and build up on the cutting edge of the tools. Machinability rating is approximately 45 percent of that of B1112.
Weldability
The base metal should be preheated to 400/600ºF (205/315ºC) and the temperature maintained at 400ºF (205ºC) during welding. A post-weld treatment at 1200ºF (650ºC) should be carried out on the weldment as soon as possible after cooling to room temperature.
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