• Hardenable chromium type free-machining stainless steelMagnetic in all conditions
• Low frictional properties that reduce galling and seizing
• Has same basic properties as Type 410 - good corrosion and oxidation resistance plus high strength in the hardened and tempered condition

• Basically the same as regular 416
• Obtains its free-machining characteristics by the addition of selenium rather than sulfur

Types 416, 416 Se Stainless Steels are available in:

• Bar, Wire, Billets
• For most machined parts, 416 and 416 Se are usually supplied in the cold-finished condition.

The following specifications are generally applicable:

• Used for parts that are extensively machined and require the corrosion resistance of a 13% chromium stainless steel
• Applications include screw machine products, bolts, nuts, gears, shafts, valve parts, axles, fasteners, and fittings

• Types 416 and 416 Se Stainless Steels have useful levels of corrosion resistance to such media as natural food acids, waste products, basic and neutral salts, natural waters and most atmospheric conditions.  They have adequate resistance for many applications where dampness and chemical activity normally cause rapid deterioration of mild and low alloy steel.

  For best corrosion resistance, a smooth surface finish free from scale, contamination and foreign particles is recommended. It is desirable to passivate finished parts for 20 to 30 minutes in a solution of warm 20% nitric acid (by volume) plus 4 to 6% sodium dichromate (by weight).

Types 416 and 416 Se have excellent machinability. Types 416 and 416 Se provide good surface finishes.

Welding Types 416 and 416 Se requires special handling.  Weldability to these types can be improved by using methods that minimize dilution of the weld metal with the melted base metal. Reducing the time that welds are in the hot-shortness temperature range and use of Type 312 (29-9) filler metal help obtain satisfactory results.

Type 416 can be midly cold worked. Type 416 Se has somewhat better formability but is not recommended for severe cold working. Where severe cold working is required, 410 should be considered.

ANNEALING: For maximum softness heat to 1550-1650° F hold for sufficient time, and furnace cool slowly to 1100° F.  For cold forming operations, uniformly heat to 1350-1450° F, hold for sufficient time and air cool.
HARDEN:  Heat to 1700-1850° F, hold for sufficient time, and air cool.
STRESS RELIEF: Heat to 300-800° F, hold for sufficient time and air cool.
TEMPER:  Heat to 1100-1400° F, hold for sufficient time and air cool