ASTM A182 UNS K31390
ASTM A182 UNS K31390 is a forging material specification for K31390 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 K31390 specification.
ASTM A182 specification covers requirements such as chemical composition, mechanical properties, heat treatment and other supplementary requirements for K31390 alloy steel forgings and forged products.
Chemical Composition
| Grade Symbol | UNS Number | Alloy | Elements | Composition % |
|---|---|---|---|---|
| F3VCb | K31390 | 3% chromium, 1% molybdenum, 0.25% vanadium plus boron, columbium, and titanium |
Carbon | 0.10–0.15 |
| Manganese | 0.30 - 0.60 | |||
| Phosphorus | 0.020 max | |||
| Sulfur | 0.010 max | |||
| Silicon | 0.10 max | |||
| Nickel | 0.25 max | |||
| Chromium | 2.7 - 3.3 | |||
| Molybdenum | 0.90 - 1.10 | |||
| Columbium | 0.015–0.070 | |||
| Titanium | 0.015 max | |||
| Vanadium | 0.20 - 0.30 | |||
| Copper | 0.25 max | |||
| Calcium | 0.0005 - 0.0150 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength, min, ksi [MPa] | 85-110 [585-760] |
| Yield Strength, min, ksi [MPa] | 60 [415] |
| Elongation in 2 in. [50mm] or 4D, min, % | 18 |
| Reduction or Area, min, % | 45 |
| Brinell Hardness Number, HBW | 174-237 |
Fasteners
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Bolts -
Screws -
Stud Bolts -
Nuts -
Threaded Rods -
Pins -
Washers -
Components