AISI 1144 Steel, annealed at 790°C (1450°F), furnace cooled 11°C (20°F) per hour to 620°C, air cooled, 25 mm (1 in.) round

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AISI 1144 Steel, annealed at 790°C (1450°F), furnace cooled 11°C (20°F) per hour to 620°C, air cooled, 25 mm (1 in.) round
Categories:	Metal; Ferrous Metal; Carbon Steel; AISI 1000 Series Steel; Medium Carbon Steel
Material Notes:	Applications include cold drawn or finished bar, cold punched nuts, split rivets, machine screws, and wood screws.
Key Words:	UNS G11440, ASTM A29, ASTM A108, ASTM A311, FED QQ-S-637 (C1144), SAE J403, SAE J412, SAE J414
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Physical Properties	Metric	English	Comments

Density	7.87 g/cc	0.284 lb/in³	Typical for steel.

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	167	167
Hardness, Knoop	188	188	Converted from Brinell
Hardness, Rockwell B	85	85	Converted from Brinell
Hardness, Vickers	175	175	Converted from Brinell
Tensile Strength, Ultimate	585 MPa	84800 psi
Tensile Strength, Yield	345 MPa	50000 psi
Elongation at Break	25 %	25 %
Reduction of Area	41.3 %	41.3 %
Modulus of Elasticity	200 GPa	29000 ksi	Typical for steel
Bulk Modulus	160 GPa	23200 ksi	Typical for steel.
Poissons Ratio	0.29	0.29	Typical For Steel
Shear Modulus	80.0 GPa	11600 ksi	Typical for steel.
Izod Impact	43.0 J	31.7 ft-lb	normalized at 900°C (1650°F)
	53.0 J	39.1 ft-lb	as rolled
	65.0 J	47.9 ft-lb	annealed at 815°C (1500°F)

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000170 ohm-cm @Temperature 20.0 °C	0.0000170 ohm-cm @Temperature 68.0 °F	condition of specimen unknown

Thermal Properties	Metric	English	Comments
CTE, linear	11.5 µm/m-°C @Temperature 20.0 °C	6.39 µin/in-°F @Temperature 68.0 °F	Typical steel
	12.2 µm/m-°C @Temperature 0.000 - 300 °C	6.78 µin/in-°F @Temperature 32.0 - 572 °F	Typical for steel
	13.9 µm/m-°C @Temperature 0.000 - 500 °C	7.72 µin/in-°F @Temperature 32.0 - 932 °F	Typical for steel
Specific Heat Capacity	0.472 J/g-°C	0.113 BTU/lb-°F	Typical steel
Thermal Conductivity	51.9 W/m-K	360 BTU-in/hr-ft²-°F	Typical steel

Component Elements Properties	Metric	English	Comments
Carbon, C	0.40 - 0.48 %	0.40 - 0.48 %
Iron, Fe	97.5 - 98.01 %	97.5 - 98.01 %	As remainder
Manganese, Mn	1.35 - 1.65 %	1.35 - 1.65 %
Phosphorus, P	<= 0.040 %	<= 0.040 %
Sulfur, S	0.24 - 0.33 %	0.24 - 0.33 %

References for this datasheet.

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M114CC / 7269

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