AISI 1021 Steel, mock carburized at 910°C (1670°F) for 8 hours, 775°C (1430°F) reheat, water quenched, 175°C (350°F) temper, 100 mm (4 in.) round

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AISI 1021 Steel, mock carburized at 910°C (1670°F) for 8 hours, 775°C (1430°F) reheat, water quenched, 175°C (350°F) temper, 100 mm (4 in.) round
Categories:	Metal; Ferrous Metal; Carbon Steel; AISI 1000 Series Steel; Low Carbon Steel
Material Notes:	Used in cold heading and extruding. Applications include low-strength fasteners, die pins, motor spindles, and recessed-head screws. Post water quenched hardness: 34 HRC surface, 84 HRB half-radius, 81 HRB center.
Key Words:	UNS G10210, ASTM A29, ASTM A510, ASTM A519, ASTM A545, ASTM A548, ASTM A576, carbon steels, ASTM A659, SAE J403, SAE J412, SAE J414, BS 970 070M20, EN3, BS 970 080M20
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Physical Properties	Metric	English	Comments

Density	7.858 g/cc	0.2839 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	149	149
Hardness, Knoop	169	169	Converted from Brinell
Hardness, Rockwell B	80	80	Converted from Brinell
Hardness, Vickers	155	155	Converted from Brinell
Tensile Strength, Ultimate	510 MPa	74000 psi
Tensile Strength, Yield	293 MPa	42500 psi
Elongation at Break	32.5 %	32.5 %	in 50 mm
Reduction of Area	71.1 %	71.1 %
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

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000159 ohm-cm @Temperature 0.000 °C	0.0000159 ohm-cm @Temperature 32.0 °F	estimated by comparison with similar steel alloys

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	0.17 - 0.23 %	0.17 - 0.23 %
Iron, Fe	98.78 - 99.23 %	98.78 - 99.23 %	As remainder
Manganese, Mn	0.60 - 0.90 %	0.60 - 0.90 %
Phosphorus, P	<= 0.040 %	<= 0.040 %
Sulfur, S	<= 0.050 %	<= 0.050 %

References for this datasheet.

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