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AISI 4340 Fasteners

AISI 4340 Fasteners

Boltport Fasteners is a manufacturer and supplier of AISI 4340 Fasteners such as bolts, screws, stud bolts, threaded rods, nuts, washers and other bolting components. AISI 4340 is a chromium-molybdenum alloy steel with high strength properties, used for manufacturing wide range of fasteners across ASTM and ISO bolting standards.

AISI 4340 alloy steel fasteners are manufactured using as rolled bar stock followed by quench and tempering to achieve full grade strength as required to A320 L43, F568 Grade Class 12.9 & ISO 898 specifications.

AISI 4340 Technical Data Sheet

AISI 4340 Fasteners

  • AISI 4340 Bolts
    Bolts
  • AISI 4340 Screws
    Screws
  • AISI 4340 Stud Bolts
    Stud Bolts
  • AISI 4340 Threaded Rods
    Threaded Rods
  • AISI 4340 Nuts
    Nuts
  • AISI 4340 Washers
    Washers
  • AISI 4340 Springs
    Springs
  • AISI 4340 Pins
    Pins
  • AISI 4340 Accessories
    Accessories
  • AISI 4340 Components
    Components

AISI 4340 Equivalent Grades

xxx xxx xxx xxx
36CrNiMo4 UNS G43400 DIN 1.6511 JIS SCM439

AISI 4340 Properties

AISI 4340 Chemical Composition

Carbon Manganese Sulphur Phosphorus Silicon Molybdenum Chromium
0.38 - 0.43 % 0.75 - 1.00 % 0.04 % max 0.035 % max 0.15 - 0.30 % 0.15 - 0.25 % 0.80 - 1.10 %

AISI 4340 Mechanical Properties

Tensile Strength Yield Strength Hardness, Rockwell Hardness, Brinell
655 MPa (Min.) 415 MPa (Min.) 25 - 70 197 (Min.)

AISI 4340 Fastener Specifications

Grades Description Additional Details
ASTM A320   More Information »
ASTM F568   More Information »
ASTM F1554   More Information »
ISO 898-1   More Information »
ISO 898-2   More Information »