Alloy Information Report for AISI 1055

General Characteristics of AISI 1055

Heat treatment and cold working give AISI 1055 strength for a variety of applications that range from agricultural implements to hand tools. Cold work or heat treat this high-carbon, wear-resistant alloy to maximize strength.

Chemical Composition of AISI 1055

Carbon 0.50-0.60
Manganese 0.60-0.90
Phosphorus 0.040 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 1055

Normalize at 1550° to 1625°F (843° to 885°C)
Full anneal at 1525° to 1600°F (829° to 871°C) before furnace cooling
Process anneal at 1100° to 1225°F (593° to 663°C) after cold working
Harden
- Heat to 1450° to 1525°F (788° to 829°C)
- Oil or water quench
- Temper
May be oil or water quenched

Applications of AISI 1055

Agricultural implements
Heavy machinery components
Wear-resistant parts
Ring-rolling tools
Battering tools
Hand tools
Springs

Machinability of AISI 1055

Sulfurized or chlorinated cutting oils for high-speed steel cutters
No oil for carbide-tip tools
Grind high-speed steel turning tools
- 8-12° side rake
- 6-10° back rake
- 7-9° side and end relief
- 12-16° side cutting-edge angle
- 8-14° end cutting-edge angle
- Nose radius 10% of cut depth
Grind carbide-tip tools
- 6-12° side rake
- 2-8° back rake
- 6-10° side and end relief
- 8-12° end cutting-edge angle
- 8-16° side cutting-edge angel
- 1/32” nose radius

Workability of AISI 1055

Hot work 2200° to 1800°F (1204° to 982°C)
Intermediate annealing required for considerable cold working
Fully anneal when further cold work will follow extensive cold work

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