Sep 21 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Forming
Welding
Heat Treatment
Forging
Hot Working
Cold Working
Annealing
Tempering
Hardening
Applications
Introduction
Carbon steels contain carbon as the chief alloying element.
Residual elements such as copper, chromium, molybdenum, nickel, and
aluminium are also present in traces. They also contain 1.2% of
manganese and 0.4% of silicon. AISI 1075 carbon steel is more brittle
than the lower carbon steels.
The following datasheet gives an overview of AISI 1075 carbon steel
Chemical Composition
The chemical composition of AISI 1075 carbon steel is tabulated
below.
| Element |
Content
(%) |
Iron, Fe
|
98
|
| Carbon, C |
0.70-0.80 |
| Manganese, Mn |
0.40-0.70 |
| Sulfur, S |
0.05 (max) |
| Phosphorous, P |
0.04 (max) |
Physical Properties
The following table shows the physical properties of AISI 1075
carbon steel.
| Properties |
Metric |
Imperial |
| Density |
7.7-8.03 g/cm3 |
0.278- 0.290 lb/in3 |
| Melting point |
1515°C |
2760°F |
Mechanical Properties
The mechanical properties of AISI 1075 carbon steel are outlined in
the following table.
| Properties |
Metric |
Imperial |
| Elastic modulus |
190-210 GPa |
27557-30458 ksi |
| Poisson's ratio |
0.27-0.30 |
0.27-0.30 |
Other Designations
Other designations that are equivalent to AISI 1075 carbon steel
include:
- ASTM A29 (1075)
- ASTM A510 (1075)
- ASTM A713 (1075)
- SAE J403 (1075)
- SAE J412 (1075)
Fabrication and Heat Treatment
Machinability
The machinability rate of AISI 1075 carbon steel is 50.
Forming
AISI 1075 carbon steel can be formed using conventional techniques.
Welding
AISI 1075 carbon steel can be welded using all welding methods. It
is pre-heated at 260 to 315°C (500 to 600°F) and post-heated at 649 to
788°C (1200 to 1450°F) to prevent cracking.
Heat Treatment
AISI 1075 carbon steel can be hardened at 899°C (1650°F). It is then
quenched in oil followed by tempering.
Forging
AISI 1075 carbon steel can be forged at 927 to 1204°C (1700 to
2200°F) followed by annealing.
Hot Working
AISI 1075 carbon steel can be hot worked at 94 to 483°C (200 to
900°F).
Cold Working
Cold working of AISI 1075 carbon steel is performed using
conventional methods in the annealed condition. It needs more force
compared to low carbon steels to perform this process.
Annealing
Annealing of AISI 1075 carbon steel can be done at 926°C (1700°F)
followed by slowly cooling in the furnace.
Tempering
AISI 1075 carbon steel is tempered at 371 to 705°C (700 to 1300°F)
after heating and quenching. It is usually used in the hardened
condition of Rockwell C 55.
Hardening
AISI 1075 carbon steel is hardened by cold working, heating, and
quenching.
Applications
AISI 1075 carbon steel is mainly used in cutting tools, and springs.