AISI 4147 Alloy Steel (UNS G41470)

Sep 11 2012

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations

Introduction

Alloy steels comprise a wide range of steels having compositions that exceed the limitations of Si, Va, Cr, Ni, Mo, Mn, B and C allocated for carbon steels. In comparison with carbon steels, alloy steels are a lot more responsive to mechanical and heat treatments.

Alloy steels contain elements such as chromium, cobalt, nickel, etc. These steels can be subjected to unique melting and deoxidization processes for specific applications.

The following datasheet provides an overview of AISI 4147 alloy steel.

Chemical Composition

The chemical composition of AISI 4147 alloy steel is outlined in the following table.

Element Content (%)
Chromium, Cr 0.80-1.10
Manganese, Mn 0.75-1.00
Carbon, C 0.45-0.50
Silicon, Si 0.15-0.30
Molybdenum, Mo 0.15-0.25
Phosphorus, P 0.035 (max)
Sulfur, S 0.04 (max)

Physical Properties

The following table shows the physical properties of AISI 4147 alloy steel.

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

Mechanical Properties

The mechanical properties of AISI 4147 alloy steel are displayed in the following table.

Properties Metric Imperial
Bulk modulus (typical for steels) 140 GPa 20300 ksi
Shear modulus (typical for steels) 80.0 GPa 11600 ksi
Elastic modulus 190-210 27557-30458 ksi
Poisson's ratio 0.27-0.30 0.27-0.30
Hardness, Brinell (annealed and cold drawn) 187-235 187-235
Hardness, Knoop (converted from Brinell hardness) 234 234
Hardness, Rockwell B (converted from Brinell hardness) 94 94
Hardness, Rockwell C (converted from Brinell hardness, value below normal HRC range, for comparison purposes only) 16 16
Hardness, Vickers (converted from Brinell hardness) 222 222
Machinability (annealed and cold drawn, based on 100 machinability for AISI 1212 steel) 60 60

Thermal Properties

The thermal properties of AISI 4147 alloy steel are given in the following table.

Properties Metric Imperial
Thermal Conductivityconductivity 42.6 W/mK 296 BTU in/hr.ft².°F

Other Designations

Equivalent materials to AISI 4147 alloy steel are:

  • ASTM A322
  • ASTM A331
  • ASTM A505
  • ASTM A519
  • SAE J404
  • SAE J412
  • SAE J770

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