Alloy Information Report for AISI 1045

General Characteristics of AISI 1045

AISI 1045 is a low-cost alloy suitable for most engineering and construction applications. A medium-carbon steel with adequate strength and toughness characteristics, AISI 1045 is valuable for induction- or flame-hardened components.

Chemical Composition of AISI 1045

Carbon 0.43
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 1045

1300°F (704°C) safe tempering maximum
Normalize by heating to 1575° to 1650°F (857° to 899°C)
Full anneal at 1500° to 1625°F (816° to 885°C)
Process anneal after cold working at 1100° to 1225°F (593° to 663°C)
Harden
- Heat to 1500° to 1600°F (816° to 871°C)
- Water or oil quench
- Temper to appropriate hardness

Applications of AISI 1045

Cold extrusion
Cold drawing
Shafts
Pins
Axles
Rods
Studs
Machine parts
Bolts
Gears
Pinions
Forgings
Bulldozer edges

Machinability of AISI 1045

Annealed, normalized, and quenched and tempered state allows easy machining
Up to 70% of B1112 machinability rating for cold-drawn and annealed stock
Cobalt high-speed steel or carbide-tip tools
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 1045

Hot work from 2250° to 1800°F (1232° 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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