Sep 26 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Introduction
Alloy steels consist of a broad spectrum of steels whose compositions exceed the limitations of C, Mo, Cr, Va, Mn, Ni, Si, and B which have been fixed for carbon steels. These steels are basically more responsive to mechanical and heat treatments than carbon steels.
The following datasheet provides details about AISI 4042 alloy steel.
Chemical Composition
The following table shows the chemical composition of AISI 4042 alloy steel.
Element |
Content (%) |
Iron, Fe |
97.93-98.55 |
Manganese, Mn |
0.70-0.90 |
Carbon, C |
0.40-0.45 |
Molybdenum, Mo |
0.20-0.30 |
Silicon, Si |
0.15-0.35 |
Sulfur, S |
0.040 |
Phosphorous, P |
0.035 |
Physical Properties
The physical properties of AISI 4042 alloy steel are outlined in the following table.
Properties |
Metric |
Imperial |
Density |
7.85 g/cm3 |
0.284 lb/in³ |
Mechanical Properties
The mechanical properties of AISI 4042 alloy steel are tabulated below.
Properties |
Metric |
Imperial |
Elastic modulus |
190-210 GPa |
27557-30458 ksi |
Bulk modulus (typical for steel) |
140 GPa |
20300 ksi |
Shear modulus (typical for steel) |
80 GPa |
11600 ksi |
Poisson’s ratio |
0.27-0.30 |
0.27-0.30 |
Hardness, Brinell |
179-229 |
179-229 |
Hardness, Knoop (converted from Brinell hardness) |
226 |
226 |
Hardness, Rockwell B (converted from Brinell hardness) |
93 |
93 |
Hardness, Rockwell C (converted from Brinell hardness, value below normal HRC range, for comparison purposes only) |
14 |
14 |
Hardness, Vickers (converted from Brinell hardness) |
214 |
214 |
Machinability (annealed and cold drawn. based on 100 machinability for AISI 1212 steel) |
65 |
65 |
Thermal Properties
The thermal properties of AISI 4042 alloy steel are tabulated below.
Properties |
Metric |
Imperial |
Thermal conductivity |
44.5 W/mK |
309 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to AISI 4042 alloy steel are:
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ASTM A322
-
ASTM A331
-
ASTM A519
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SAE J404
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SAE J412
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SAE J770