416 Stainless Steel
416 Stainless Steel is a free-machining stainless steel with a very high machinability of 85%, it is in fact the highest of all stainless steels.
Type 416 is a martensitic steel alloy, in this case with the addition of sulphur – this addition to the alloy gives 416 excellent machining properties. Corrosion resistance is at its optimum performance if the alloy is hardened and tempered.
We supply 416 in bar, wire and billets. Contact us for the best prices.
416 Stainless Steel Bar Grinding Services
- 416 stainless steel is a hardenable chromium type free-machining stainless steel
- Magnetic 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
Available Forms
Types 416 Stainless Steels are available in:
- Bar
- Wire
- Billets
For most machined parts, Type 416 is usually supplied in the cold-finished condition.
Typical Applications
- 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
416 Stainless Steel Specifications
The following specifications are generally applicable:
- MS 5610 G
- ASTM A193-66
- ASTM A276-67
- ASTM A314-63
- ASTM A580-67
- QQ-S-764A
- MIL-S-862 B
416 Stainless Steel Composition & Properties
Property
Type 416%
Carbon
.15 max
Manganese
1.25 max
Phosphorus
.06 max
Sulfur
.15 min
Selenium
NA
Silicon
1.00 max
Chromium
12.00 – 14.00
Mechanical Properties
Tensile Strength (psi)
Brinell Hardness Max
Hot Rolled Annealed
241
Annealed & Cold Finished
Up to 1/2? inc.
85,000 / 120,000
241
Over 1/2?
241
Machinability
- Type 416 has excellent machinability and provides good surface finishes.
Formability
- Type 416 can be midly cold worked. Where severe cold working is required, 410 should be considered.
Heat Treatment
- 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.
Forging
- Type 410 can be readily forged at 2300° F.
- Preheat steel to 1800° F for 2 hours, raise rapidly to 2300° F, soak for 4 to 6 hours, forge, slow cool.
Corrosion Resistance
- Types 416 Stainless Steel has useful levels of corrosion resistance to such media as natural food acids, waste products, basic and neutral salts, natural waters and most atmospheric conditions.
- It has 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).
Welding
- Welding Type 416 requires special handling.
- Weldability to this type 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.
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