AISI 1029 Carbon Steel (UNS G10290)
Steels having carbon as the specific alloying element are called as carbon steels. They also contain up to 0.4% silicon and 1.2% manganese. In addition, the residual elements such as copper, molybdenum, aluminium, chromium and nickel are present in these steels.
AISI 1029 Carbon Steel (UNS G10290)
Introduction
Steels having carbon as the specific alloying element are called as carbon steels. They also contain up to 0.4% silicon and 1.2% manganese. In addition, the residual elements such as copper, molybdenum, aluminium, chromium and nickel are present in these steels.
The following datasheet will explain in detail about AISI 1029 carbon steel .
Chemical Composition
The chemical composition of AISI 1029 carbon steel is outlined in the following table.
| Element | Content (%) |
|---|---|
| Iron, Fe | 98.7-99.15 |
| Manganese, Mn | 0.600-0.900 |
| Carbon, C | 0.250-0.310 |
| Sulfur, S | 0.0500 |
| Phosphorous, P | 0.0400 |
Physical Properties
The physical properties of AISI 1029 carbon steel are tabulated below.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.7-8.03 g/cm3 | 0.278-0.290 lb/in3 |
Mechanical Properties
The following table shows mechanical properties of AISI 1029 carbon steel.
| Properties | Metric | Imperial |
|---|---|---|
| Modulus of elasticity | 190-210 GPa | 29700-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
Other Designations
Other designations that are equivalent to AISI 1029 carbon steel include the following:
- ASTM A29
- ASTM A510
- ASTM A576
- SAE J403
- SAE J412
FORGING
Forging of AISI 1029 Steel would be carried out at a temperature of around 2200ºF (1205ºC) down to 1650-1700ºF (900-925ºC.) The actual forging and finishing temperatures will depend on a number of factors, including overall reduction during forging and complexity of part being forged.
Experience alone will determine near exact values for these two parameters.
Parts are air cooled after forging.
HEAT TREATMENT
Annealing
To produce a structure suitable for machining, these grades may be annealed by austenitizing at 1550-1625ºF (845-885ºC), furnace cooling to 1200ºF (650ºC) at 50ºF (28ºC) per hour, soaking and air cooling. This will give a structure of coarse pearlite with minimum ferrite.
NORMALIZING
These grades would be normalized at around 1700ºF (925ºC,) and prior to tempering or to hardening and tempering.
HARDENING
These grades would be austenitized at 1550-1600ºF (845-870ºC) and water quenched.
TEMPERING
Tempering would be carried out at temperatures based on past experience, to provide the required mechanical properties.
MACHINABILITY
Best machinability is obtained on these grades following an annealing treatment that will give a microstructure of coarse pearlite with minimum ferrite. See annealing above.
WELDABILITY
Welding of these grades may be carried out by all normal fusion methods, preferably using low-carbon electrodes.
APPLICATIONS
AISI 1029 Stell suitable for the manufacture of forged components that are subjected to low stresses, for automotive and general engineering.
