AISI 8620 Fasteners

AISI 8620 Fasteners

BoltPort is a manufacturer and supplier of AISI 8620 fasteners in metric and imperial sizes. These alloy steel fasteners are used for high tensile applications in sectors of marine engineering, shipbuilding and repair, structural construction, automotives and oil & gas extraction platforms. Unlike AISI 4140 and 4340, 8620 is not quite common choice for regular bolting. However AISI 8620 is still on list of bolting material for some service critical applications. Most of consigment of 8620 alloy steel bolting are hot forged or bar machined. AISI 8620 fasteners are not available ex-stock and must be made to order with minimum lead time of 3 weeks.

AISI 8620 alloy steel is a general purpose carburizing steel. This alloy steel grade can be improvised for case/core hardening properties during heat treatment. Alloy 8620 when thermally heat treated develops a hard outer case with soft ductile core. Carefully controlled proportions of chromium, nickel and molybdenum are responsible for the extensive use as a carburizing alloy steel, with valuable features including extreme surface hardenability and good internal strength.

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

AISI 8620 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 8620 Equivalent Grade Designations

AISI European Name UNS Designation DIN / EN / Werkstoff
8620 25CrMo4 G86200 1.7218

AISI 8620 Fastening Products

Material Specifications for AISI 8620

Specifications Material Form Products
ASTM A29 AISI 8620/UNS G86200 Bars and Rods Bolts, Screws, Stud Bolts, Nuts, Bar Components
ASTM A108 AISI 8620/UNS G86200 Bars and Rods Bolts, Screws, Stud Bolts, Nuts, Bar Components
ASTM A322 AISI 8620/UNS G86200 Bars and Rods Bolts, Screws, Stud Bolts, Nuts, Bar Components
ASTM A331 AISI 8620/UNS G86200 Bars and Rods Bolts, Screws, Stud Bolts, Nuts, Bar Components
ASTM A506 AISI 8620/UNS G86200 Sheet, Plates & Strips Washers, Sheet Metal Components
ASTM A574 Grade 8 Bolting Socket Head Cap Screws
ASTM A829 AISI 8620/UNS G86200 Sheet, Plates & Strips Washers, Sheet Metal Components
SAE J404 AISI 8620/UNS G86200 Alloy Steel Chemical Composition Requirements
SAE J1397 AISI 8620/UNS G86200 Alloy Steel Chemical Composition Requirements

Coating Options for AISI 8620 Fasteners

Product Keywords

    Alloy Steel, AISI 8620, Fasteners, Bolts, Screws, Stud Bolts, Threaded Rods, Nuts, Washers, Dowel Pins, Custom Bolting, Components, Grade Equivalent, UNS G86200, DIN 1.7225, 42CrMo4, Products, Material Specifications, Coatings.