Sep 13 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther Designations
Introduction
Carbon steels are the steels having carbon as the major alloying element. They also contain up to 1.2% manganese and 0.4% silicon. In addition, the residual elements like copper, molybdenum, aluminium, chromium and nickel are present in these steels.
The following sections will give an overview of AISI 1055 carbon steel in detail.
Chemical Composition
The chemical composition of AISI 1055 carbon steel is outlined in the following table.
Element |
Content (%) |
Iron, Fe |
98.41-98.9 |
Manganese, Mn |
0.60-0.90 |
Carbon, C |
0.50-0.60 |
Sulfur, S |
≤ 0.050 |
Phosphorous, P |
≤ 0.040 |
Physical Properties
The physical properties of AISI 1055 carbon steel are tabulated below.
Properties |
Metric |
Imperial |
Density |
7.85 g/cm3 |
0.284 lb/in3 |
Mechanical Properties
The following table shows mechanical properties of the cold drawn AISI 1055 carbon steel.
Properties |
Metric |
Imperial |
Tensile strength, ultimate |
660 MPa |
95700 psi |
Tensile strength, yield |
560 MPa |
81200 psi |
Modulus of elasticity |
190-210 GPa |
29700-30458 ksi |
Bulk modulus (typical for steel) |
140 GPa |
20300 ksi |
Shear modulus (typical for steel) |
80 GPa |
11600 ksi |
Poissons ratio |
0.27-0.30 |
0.27-0.30 |
Elongation at break (in 50 mm) |
10% |
10% |
Reduction of area |
40% |
40% |
Hardness, Brinell |
197 |
197 |
Hardness, Knoop (converted from Brinell hardness) |
219 |
219 |
Hardness, Rockwell B (converted from Brinell hardness) |
92 |
92 |
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) |
13 |
13 |
Hardness, Vickers (converted from Brinell hardness) |
207 |
207 |
Machinability (based on AISI 1212 steel. as 100 machinability) |
55 |
55 |
Thermal Properties
The thermal properties of AISI 1055 carbon steel are given in the following table.
Properties |
Metric |
Imperial |
Thermal expansion co-efficient |
11 µm/m°C |
6.11 µin/in°F |
Thermal conductivity |
49.8 W/mK |
346 BTU in/hr.ft2.°F |
Other Designations
Other designations that are equivalent to AISI 1055 carbon steel include the following:
- DIN 1.1209
- ASTM A29
- ASTM A510
- ASTM A576
- ASTM A682
- FED QQ-S-700 (1055)
- SAE J403
- SAE J412
- SAE J414