AISI 4140 Fasteners

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 Properties

Chemical Composition

  • Carbon C 0.38 - 0.43 %
  • Manganese Mn 0.75 - 1.00 %
  • Sulphur S 0.04 % max
  • Phosphorus P 0.035 % max
  • Silicon Si 0.15 - 0.30 %
  • Molybdenum Mo 0.15 - 0.25 %
  • Chromium Cr 0.80 - 1.10 %
  • Iron Fe 96.78 - 97.77%

Mechanical Properties

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

AISI 4140 Equivalent Grade Designations

AISI European Name UNS Designation DIN / EN / Werkstoff
4140 25CrMo4 G41400 1.7218

AISI 4140 Fasteners

AISI 4140 Material Specifications

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

Coating Options for AISI 4140 Fasteners

Product Keywords

    Alloy Steel, AISI 4140, Fasteners, Bolts, Screws, Stud Bolts, Threaded Rods, Nuts, Washers, Dowel Pins, Custom Bolting, Components, Grade Equivalent, UNS G41400, DIN 1.7225, 42CrMo4, Products, Material Specifications, Coatings.