Alloy Information Report for Stainless Steel 501

General Characteristics of Stainless 501

Stainless 501 resists corrosion at moderate temperatures while offering heat resistance and favorable mechanical characteristics in higher heat applications. Magnetic in all conditions, Stainless 501 is a stainless steel almost always annealed when used.

Chemical Composition of Stainless 501

Carbon 0.10 min
Silicon 1.00 max
Manganese 1.00 max
Chromium 4.00-6.00
Phosphorus 0.040 max
Molybdenum 0.40-0.65
Sulfur 0.030 max
Iron balance

Heat Treatment of Stainless 501

Full anneal by heating at 1525° to 1600°F (829° to 871°C) before gradual furnace cooling
Low anneal by heating at 1325° to 1375°F (718° to 746°C) before gradually cooling
Harden by heating at 1600° to 1700°F (871° to 927°C), then soaking, oil quenching and tempering at 400° to 1400°F (204° to 760°C)

Applications of Stainless 501

Refinery equipment, including oil pump and pipe parts

Machinability of Stainless 501

Favorable machinability when annealed
- Grind high-speed steel single-point cutting tools to the following:
- Side rake: 6-12°
- Back rake: 5-10°
- Side and end relief: 6-10°
- End cutting-edge angle: 6-15°
- Side cutting-edge angle: 10-20°
- Nose radius: 10° cutting depth
Sulfurized or chlorinated cutting fluids with high-speed steel tools
Carbide tipped tools
- Side rake: 4-12°
- Back rake: 0-5°
- Side and end relief: 4-10°
- End cutting-edge angle: 8-14°
- Side cutting-edge angle: 10-20°
- Nose radius: 1/32”

Workability of Stainless 501

Appropriate for normal hot-forming procedures
Hot bend at 1750° to 1850°F (954° to 1010°C)
2100° to 2200°F (1149° to 1204°C) for initial forging
Finish at 1700°F (927°C)

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