ASTM A182 UNS K31830 is a forging material specification for K31830 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 K31830 specification.

ASTM A182 specification covers requirements such as chemical composition, mechanical properties, heat treatment and other supplementary requirements for K31830 alloy steel forgings and forged products.

Chemical Composition

Grade Symbol UNS Number Alloy Elements Composition %
F3V K31830 3% chromium, 1% molybdenum, 0.25% vanadium plus boron and titanium Carbon 0.05 - 0.18
Manganese 0.30 - 0.60
Phosphorus 0.020 max
Sulfur 0.020 max
Silicon 0.10 max
Chromium 2.8 - 3.2
Molybdenum 0.90 - 1.10
Titanium 0.015 - 0.035
Vanadium 0.20 - 0.30
Boron 0.001 - 0.003

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

  • 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