Sep 21 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther Designations
Introduction
Alloy steels contain different varieties of steels exceeding the composition limits of Mn, C, Mo, Si, Ni, Va, and B set for carbon steels. They are designated by AISI four-digit numbers. The first two digits represent the main alloying elements, and the last two digits represent the carbon content present in the alloy in hundredth of a percent.
The datasheet given below provides more details about AISI 8627 alloy steel.
Chemical Composition
The following table shows the chemical composition of AISI 8627 alloy steel.
Element |
Content (%) |
Iron, Fe |
96.87 - 97.95 |
Manganese, Mn |
0.700 - 0.900 |
Nickel, Ni |
0.400 - 0.700 |
Chromium, Cr |
0.400 - 0.600 |
Carbon, C |
0.250 - 0.300 |
Silicon, Si |
0.150 - 0.300 |
Molybdenum, Mo |
0.150 - 0.250 |
Sulfur, S |
≤ 0.0450 |
Phosphorous, P |
≤ 0.0350 |
Physical Properties
The physical properties of AISI 8627 alloy steel are highlighted in the following table.
Properties |
Metric |
Imperial |
Density |
7.85 g/cm3 |
0.284 lb/in³ |
Mechanical Properties
The following table outlines the mechanical properties of AISI 8627 alloy steel.
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 - 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 machinabibity) |
60 |
60 |
Thermal Properties
The thermal properties of AISI 8627 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 8627 alloy steel include:
- ASTM A29
- ASTM A322
- ASTM A331
- ASTM A519
- ASTM A752
- ASTM A829
- SAE J1397
- SAE J404
- SAE J770