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AISI 4140H Steel, normalized at 870°C (1600°F), air cooled, 13 mm (0.5 in.) round
Categories:
Metal
;
Ferrous Metal
;
Alloy Steel
;
AISI 4000 Series Steel
;
Low Alloy Steel
;
Carbon Steel
;
Medium Carbon Steel
Material Notes:
Normalized (heated to 870°C, air cooled)
Key Words:
AFNOR 40 CD 4, AFNOR 42 CD 4, JIS SCM 4 H, JIS SCM440, SS14 2244 (Sweden), B.S. 708 A 42 (UK), B.S. 708 M 40 (UK), B.S. 709 M 40 (UK), UNS H41400, ASTM A304, SAE J1268, DIN 1.7225
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Physical Properties
Metric
English
Comments
Density
7.85
g/cc
0.284
lb/in³
Mechanical Properties
Metric
English
Comments
Hardness, Brinell
302
302
Hardness, Knoop
328
328
Converted from Brinell
Hardness, Rockwell B
99
99
Converted from Brinell
Hardness, Rockwell C
32
32
Converted from Brinell
Hardness, Vickers
319
319
Converted from Brinell
Tensile Strength, Ultimate
1020
MPa
148000
psi
Tensile Strength, Yield
675
MPa
97900
psi
Elongation at Break
17.8 %
17.8 %
Reduction of Area
48.2 %
48.2 %
Modulus of Elasticity
205
GPa
29700
ksi
Typical for steel
Bulk Modulus
160
GPa
23200
ksi
Typical for steels.
Poissons Ratio
0.29
0.29
Calculated
Machinability
65 %
65 %
Based on AISI 1212 as 100% machinability.
Shear Modulus
80.0
GPa
11600
ksi
Typical for steels.
Electrical Properties
Metric
English
Comments
Electrical Resistivity
0.0000220
ohm-cm
@Temperature 20.0 °C
0.0000220
ohm-cm
@Temperature 68.0 °F
specimen hardened and tempered
0.0000263
ohm-cm
@Temperature 100 °C
0.0000263
ohm-cm
@Temperature 212 °F
specimen hardened and tempered
0.0000326
ohm-cm
@Temperature 200 °C
0.0000326
ohm-cm
@Temperature 392 °F
specimen hardened and tempered
0.0000475
ohm-cm
@Temperature 400 °C
0.0000475
ohm-cm
@Temperature 752 °F
specimen hardened and tempered
0.0000646
ohm-cm
@Temperature 600 °C
0.0000646
ohm-cm
@Temperature 1110 °F
specimen hardened and tempered
Thermal Properties
Metric
English
Comments
CTE, linear
12.2
µm/m-°C
@Temperature 0.000 - 100 °C
6.78
µin/in-°F
@Temperature 32.0 - 212 °F
13.7
µm/m-°C
@Temperature 20.0 - 400 °C
7.61
µin/in-°F
@Temperature 68.0 - 752 °F
14.6
µm/m-°C
@Temperature 20.0 - 600 °C
8.11
µin/in-°F
@Temperature 68.0 - 1110 °F
Specific Heat Capacity
0.473
J/g-°C
@Temperature 150 - 200 °C
0.113
BTU/lb-°F
@Temperature 302 - 392 °F
0.519
J/g-°C
@Temperature 350 - 400 °C
0.124
BTU/lb-°F
@Temperature 662 - 752 °F
0.561
J/g-°C
@Temperature 550 - 600 °C
0.134
BTU/lb-°F
@Temperature 1020 - 1110 °F
Thermal Conductivity
42.6
W/m-K
296
BTU-in/hr-ft²-°F
Component Elements Properties
Metric
English
Comments
Carbon, C
0.37 - 0.44 %
0.37 - 0.44 %
Chromium, Cr
0.75 - 1.2 %
0.75 - 1.2 %
Iron, Fe
96.585 - 97.93 %
96.585 - 97.93 %
As remainder
Manganese, Mn
0.65 - 1.1 %
0.65 - 1.1 %
Molybdenum, Mo
0.15 - 0.30 %
0.15 - 0.30 %
Phosphorus, P
<= 0.035 %
<= 0.035 %
Silicon, Si
0.15 - 0.30 %
0.15 - 0.30 %
Sulfur, S
<= 0.040 %
<= 0.040 %
References
for this datasheet.
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Users viewing this material also viewed the following:
AISI 4140 Steel, normalized at 870°C (1600°F), air cooled, 13 mm (0.5 in.) round
AISI 4140H Steel, oil quenched 845°C (1550°F), tempered 540°C (1000°F), 13 mm (0.5 in.) round
AISI 4140 Steel, annealed at 815°C (1500°F) furnace cooled 11°C (20°F)/hour to 665°C (1230°F), air cooled, 25 mm (1 in.) round
Overview of materials for AISI 4000 Series Steel
AISI 4140 Steel, normalized at 870°C (1600°F), reheated to 845°C (1550°F), oil quenched, 205°C (400°F) temper, 25 mm (1 in.) round
M414AH / 7567
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