AISI 1045

AISI 1045

Category	Steel
Class	Carbon steel
Type	Standard
Designations	France: AFNOR XC 42 TS , AFNOR XC 45 , AFNOR XC 48 , AFNOR XC42 Germany: DIN 1.1191 Japan: JIS S 45C , JIS S 48 C Sweden: SS 1672 United States: ASTM A29 , ASTM A510 , ASTM A519 , ASTM A576 , ASTM A682 , FED QQ-S-635 (C1045) , FED QQ-S-700 (1045) , SAE J403 , SAE J412 , SAE J414 , UNS G10450

Composition

Element Weight % C 0.43-0.50 Mn 0.60-0.90 P 0.04 (max) S 0.05 (max)

Mechanical Properties

Properties		Conditions
		T (°C)	Treatment
Density (×1000 kg/m3)	7.7-8.03	25
Poisson's Ratio	0.27-0.30	25
Elastic Modulus (GPa)	190-210	25
Tensile Strength (Mpa)	585	25	cold drawn, annealed (round bar (16-22 mm)) more
Yield Strength (Mpa)	505
Elongation (%)	12
Reduction in Area (%)	45
Hardness (HB)	170	25	cold drawn, annealed (round bar (19-32 mm)) more

Thermal Properties

Properties		Conditions
		T (°C)	Treatment
Thermal Expansion (10-6/ºC)	15.1	0-700 more	annealed

Source: efunda

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