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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

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



Mechanical Properties

PropertiesConditions
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

PropertiesConditions
T (°C)Treatment
Thermal Expansion (10-6/ÂșC) 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

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