AISI 8625 Alloy Steel (UNS G86250)

Sep 26 2012

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations

Introduction

Alloy steels comprise a wide variety of steels having compositions that exceed the limitations of B, C, Mn, Mo, Ni, Si, Cr, and Va in the carbon steels. They respond more quickly to mechanical and heat treatments than the carbon steels.

The following datasheet gives an overview of AISI 8625 alloy steel.

Chemical Composition

The following table shows the chemical composition of AISI 8625 alloy steel.

Element Content (%)
Iron, Fe 96.895 - 97.97
Manganese, Mn 0.700 - 0.900
Chromium, Cr 0.400 - 0.600
Nickel, Ni 0.400 - 0.700
Carbon, C 0.230 - 0.280
Silicon, Si 0.150 - 0.300
Molybdenum, Mo 0.150 - 0.250
Sulfur, S ≤ 0.0400
Phosphorous, P ≤ 0.0350

Physical Properties

The physical properties of AISI 8625 alloy steel are tabulated below.

Properties Metric Imperial
Density 7.85 g/cm3 0.284 lb/in³

Mechanical Properties

The mechanical properties of AISI 8625 alloy steel are outlined in the following table.

Properties Metric Imperial
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80.0 GPa 11600 ksi
Elastic modulus 190-210 GPa 27557-30458 ksi
Poisson's ratio 0.27-0.30 0.27-0.30
Hardness, Brinell (annealed and cold drawn) 179 - 223 179 - 223
Hardness, Knoop (converted from Brinell hardness) 223 223
Hardness, Rockwell B (converted from Brinell hardness) 93 93
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison only) 13 13
Hardness, Vickers (converted from Brinell hardness) 211 211
Machinability (annealed and cold drawn. Based on AISI 1212 steel. as 100 average) 60 60

Thermal Properties

The thermal properties of AISI 8625 alloy steel are outlined in the following table.

Properties Metric Imperial
Thermal conductivity (typical steel) 46.6 W/mK 323 BTU in/hr.ft².°F

Other Designations

Other designations that are equivalent to AISI 8625 alloy steel include:

  • ASTM A29
  • ASTM A322
  • ASTM A331
  • ASTM A519
  • ASTM A752
  • ASTM A829
  • SAE J1397
  • SAE J404
  • MIL SPEC MJL-S-16974
  • SAE J770

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