ASTM A182 UNS K91271
ASTM A182 UNS K91271 is a forging material specification for K91271 grade alloy steel and is used for manufacturing bare forgings or forged and machined products for applications involving high temperature service. Boltport Fasteners offers forged bolts, screws, nuts, studs, threaded rods and similar fasteners or bolting parts in astm a182 UNS K91271 specification.
ASTM A182 specification covers requirements such as chemical composition, mechanical properties, heat treatment and other supplementary requirements for K91271 alloy steel forgings and forged products.
Chemical Composition
| Grade Symbol | UNS Number | Alloy | Elements | Composition % |
|---|---|---|---|---|
| F122 | K91271 | 11 % chromium, 2 % tungsten, 0.2 % vanadium, plus molybdenum, columbium, copper, nickel, nitrogen, and boron |
Carbon | 0.07 - 0.14 |
| Manganese | 0.70 max | |||
| Phosphorus | 0.020 max | |||
| Sulfur | 0.010 max | |||
| Silicon | 0.50 max | |||
| Nickel | 0.50 max | |||
| Chromium | 10.00 - 11.50 | |||
| Molybdenum | 0.25 - 0.60 | |||
| Columbium | 1.00 - 2.00 | |||
| Vanadium | 0.15 - 0.30 | |||
| Boron | 0.005 | |||
| Nitrogen | 0.040 - 0.100 | |||
| Aluminium | 0.02 | |||
| Copper | 0.30 - 1.70 | |||
| Tungsten | 1.50 - 2.50 | |||
| Titanium | 0.01 | |||
| Zirconium | 0.01 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength, min, ksi [MPa] | 90 [620] |
| Yield Strength, min, ksi [MPa] | 58 [400] |
| Elongation in 2 in. [50mm] or 4D, min, % | 20 |
| Reduction or Area, min, % | 40 |
| Brinell Hardness Number, HBW | 250 max |
Fasteners
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Bolts -
Screws -
Stud Bolts -
Nuts -
Threaded Rods -
Pins -
Washers -
Components