AISI 5135 Alloy Steel (UNS G51350)

Sep 13 2012

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations

Introduction

Alloy steels are designated by AISI four-digit numbers. They quickly respond to mechanical and heat treatments than the carbon steels. They comprise different kinds of steels having composition which exceed the limitations of B, C, Mn, Mo, Ni, Si, Cr, and Va in the carbon steels.

The following datasheet gives an overview of AISI 5135 alloy steel.

Chemical Composition

The chemical composition of AISI 5135 alloy steel is tabulated below.

Element Content (%)
Iron, Fe 97.445 - 98.17
Chromium, Cr 0.750 - 1.00
Manganese, Mn 0.600 - 0.800
Carbon, C 0.330 - 0.380
Silicon, Si 0.150 - 0.300
Sulfur, S ≤ 0.0400
Phosphorous, P ≤ 0.0350

Physical Properties

The following table shows the physical properties of AISI 5135 alloy steel.

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

Mechanical Properties

The mechanical properties of AISI 5135 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 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 - 217 179 - 217
Hardness, Knoop (converted from Brinell hardness) 220 220
Hardness, Rockwell B (converted from Brinell hardness) 92 92
Hardness, Rockwell C 13 13
Hardness, Vickers (converted from Brinell hardness) 208 208
Machinability (annealed and cold drawn. Based on 100 machinability for AISI 1212 steel) 70 70

Thermal Properties

The thermal properties of AISI 5135 alloy steel are listed 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 5135 alloy steel include:

  • AFNOR 38 C 4
  • DIN 1.7034
  • UNI 38 Cr 4 KB
  • JIS SCr 3 H
  • B.S. 530 A 36
  • B.S. 530 H 36
  • B.S. Type 3
  • ASTM A322
  • ASTM A331
  • ASTM A519
  • SAE J404
  • SAE J412
  • SAE J770

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