AISI 8750 Alloy Steel (UNS G87500)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties

Introduction

Steels that contain specific amounts of alloying elements other than carbon and common elements such as phosphorus, sulfur, silicon, copper and manganese are known as alloy steels. Alloying elements are added to change mechanical or physical properties. However, carbon content and alloying elements influence the overall characteristics of alloy steels.

The following datasheet will provide an overview of AISI 8750 alloy steel.

Chemical Composition

The chemical composition AISI 8750 alloy steels is outlined in the following table.

Element Content (%)
Manganese, Mn ≤0.75-1
Carbon, C ≤0.48-0.53
Nickel, Ni ≤0.4-0.7
Chromium, Cr 0.4-0.6
Silicon, Si ≤0.2-0.35
Molybdenum, Mo 0.2-0.3
Phosphorus, P ≤0.04
Sulfur, S ≤0.04

Physical Properties

The following table shows the physical properties of AISI 8750 alloy steels.

Properties Metric Imperial
Density 7.75 g/cm3 0.280 lb/in3

Mechanical Properties

The mechanical properties of AISI 8750 alloy steels are displayed in the following table.

Properties Metric Imperial
Tensile strength 1476 MPa 214100 psi
Yield strength (@strain 0.2%) 1338 MPa 194100 psi
Modulus of elasticity 201-209 GPa 29200-30300 ksi
Bulk modulus 160-170 GPa 23200-24700 ksi
Shear modulus 81-82 GPa 11700-11900 ksi
Poisson’s ratio 0.27-0.30 0.27-030
Elongation at break 12% 12%
Hardness, Brinell 423 423

Thermal Properties

The thermal properties of AISI 8750 alloy steels are given in the following table

Properties Metric Imperial
Thermal expansion co-efficient ≥14.8 µm/m°C ≥8.22 µin/in°F
Thermal conductivity ≥37.6 W/mK ≥261 BTU.in/hrft².°F

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