AISI 4140 Fasteners

AISI 4140 Equivalent Grades

AISI 4140 Fasteners

Boltport offers made to order AISI 4140 fasteners in varieties of bolts, screws, stud bolts, studs, threaded rods, nuts, washers, pins & other bolting components, in hot forged condition. AISI 4140 fasteners are produced from premium bar stock or forging stock to various ASTM and International material specifications. AISI 4140 fasteners posseses high bolting strength and used for high temperature, high pressure applications. Automotive manufactures often refer to SAE Grade 4140 for ordering fasteners.

AISI 4140 is a low alloy steel mainly comprising chromium, molybdenum and manganese. Alloy steel 4140 has high fatigue strength, impact resistance, toughness, ductility, abrasion and torsional strength. AISI 4140 is generally supplied in hardened and tempered condition. AISI 4140 is a great choice for manufacturing high tensile fasteners. 10.9 grade high tensile bolts, screws are produced from AISI 4140 alloy steel. This alloy steel grade is widely used for oil patch applications.

Find information on this alloy grade such as chemical composition, mechanical properties, feasible fastener products, related material specifications and applications.

AISI 4140 Fasteners

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

AISI 4140 Properties

Chemical Composition

Carbon Manganese Sulphur Phosphorus Silicon Molybdenum Chromium Iron
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 % 96.78 - 97.77%

Mechanical Properties

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

Specifications for AISI 4140 Fasteners

Specifications Grade Products
ASTM A29 AISI 4140/UNS G41400 Bolts, Screws, Stud Bolts, Nuts, Bar Components
ASTM A108 AISI 4140/UNS G41400 Bolts, Screws, Stud Bolts, Nuts, Bar Components
ASTM A193 Grade B7/ B7M Bolts, Screws, Stud Bolts, Threaded Rods
ASTM A194 Grade 7/7M Nuts
ASTM A320 Grade L7/L7M/L7D Bolts, Screws, Stud Bolts, Threaded Rods
ASTM A322 AISI 4140/UNS G41400 Bolts, Screws, Stud Bolts, Nuts, Bar Components
ASTM A331 AISI 4140/UNS G41400 Bolts, Screws, Stud Bolts, Nuts, Bar Components
ASTM A506 AISI 4140/UNS G41400 Washers, Sheet Metal Components
ASTM A574 Grade 8 Socket Head cap Screws
ASTM A829 AISI 4140/UNS G41400 Washers, Sheet Metal Components
ASTM F568 Grade 10.9 Bolts, Screws, Stud Bolts, Threaded Rods
SAE J404 AISI 4140/UNS G41400 Chemical Composition Requirements
SAE J1397 AISI 4140/UNS G41400 Chemical Composition Requirements

Coating Option for AISI 4140 Fasteners

PTFE (Teflon) Hot Dip Galvanizing Aluminum Zinc Flake
Zinc Phosphating Manganese Phosphating Metallic Zinc
Nickel Plating Chrome Plating Cadmium Plating
Silver Plating Tin Plating

Applications for AISI 4140 Fasteners

Automotives Railways Structurals
Shipbuilding & Repairs Marine & Offshore Power Industry
Chemical Processing