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

  • AISI 4140 Bolts
    Bolts
  • AISI 4140 Screws
    Screws
  • AISI 4140 Stud Bolts
    Stud Bolts
  • AISI 4140 Nuts
    Nuts
  • AISI 4140 Threaded Rods
    Threaded Rods
  • AISI 4140 Pins
    Pins
  • AISI 4140 Washers
    Washers
  • AISI 4140 Components
    Components