Introduction
Carbon steels are steels containing only carbon as their key alloying element. These steels also have traces of 0.4% silicon and 1.2% manganese. Small quantities of copper, nickel, molybdenum, aluminium and chromium can also be detected in the carbon steels.
The following datasheet provides an overview of the AISI 1025 carbon steel.
Chemical Composition
The chemical composition of the AISI 1025 carbon steel is outlined in the following table.
CHEMICAL COMPOSITION OF AISI 1025
Carbon 0.22-0.28
Manganese 0.30-0.60
Phosphorus 0.04 max
Sulfur 0.050 max
Silicon 0.15 to 0.30, or:
0.10 max
0.10-0.20
0.20-0.40
0.30-0.60
Iron balance
HEAT TREATMENT OF AISI 1025
Normalize at 1625° to 1700°F (885° to 927°C) before air cooling
Full anneal at 1575° to 1700°F (857° to 927°C)
Process anneal after cold working at 1100° to 1225°F (593° to 663°C)
Harden at 1550° to 1625°F (843° to 885°C) before water quenching
Can be case hardened
APPLICATIONS OF AISI 1025
Machinery parts
Construction components
Trusses
Building sections
Tool and die applications
Cold-extruded and case-hardened parts
MACHINABILITY OF AISI 1025
Readily machined
Annealed
Normalized
Cold-drawn
Quenched, tempered
Good surface finish may be compromised from tearing when annealed and normalized
Thermal Properties
The thermal properties of the AISI 1025 carbon steel are given in the following table.
Properties Metric Imperial Thermal expansion co-efficient (@0.000100°C/32-212°F) 12.1 µm/m°C 6.72 µin/in°F Thermal conductivity (0ºC (32°F)) 51.9 W/mK 360 BTU in/hr.ft².°F Other Designations
Equivalent materials to the AISI 1025 carbon steel are given in the following table.
AMS 5046 AMS 5075 AMS 5077 ASTM A29 ASTM A510 ASTM A512 ASTM A513 ASTM A519 ASTM A575 ASTM A576 MIL T-5066 MIL T-3520 MIL S-7952 MIL S-11310 (CS 1025) ASTM A830 QQ S-700 (C1025) SAE J1397 SAE J403 SAE J412
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