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Crucible Steel Nitriding #135 Modified Steel, AISI 4140 Modified

Category Metal , Ferrous Metal , Alloy Steel , AISI 4000 Series Steel
Manufacturer Crucible Steel
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
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Material Notes:
Nitriding #135 steel is a modification of AISI 4140 specifically designed to be nitrided for high surface hardness and abrasion resistance.Information provided by Crucible Industries
Physical Properties Metric English Comments
Density 7.75 g/cc
0.280 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 28 - 30
28 - 30
Hardness, Rockwell HR30N 86
86
at surface
62

@Thickness 0.508 mm
62

@Thickness 0.0200 in
70

@Thickness 0.381 mm
70

@Thickness 0.0150 in
82

@Thickness 0.254 mm
82

@Thickness 0.0100 in
84

@Thickness 0.203 mm
84

@Thickness 0.00800 in
86

@Thickness 0.127 mm
86

@Thickness 0.00500 in
87

@Thickness 0.0762 mm
87

@Thickness 0.00300 in
Hardness, Vickers 1110
1110
at surface
420

@Thickness 0.508 mm
420

@Thickness 0.0200 in
600

@Thickness 0.381 mm
600

@Thickness 0.0150 in
950

@Thickness 0.254 mm
950

@Thickness 0.0100 in
1040

@Thickness 0.203 mm
1040

@Thickness 0.00800 in
1120

@Thickness 0.127 mm
1120

@Thickness 0.00500 in
1140

@Thickness 0.0762 mm
1140

@Thickness 0.00300 in
Modulus of Elasticity 207 GPa
30000 ksi
Thermal Properties Metric English Comments
CTE, linear 12.6 µm/m-°C

@Temperature 21.1 - 121 °C
7.00 µin/in-°F

@Temperature 70.0 - 250 °F
12.8 µm/m-°C

@Temperature 21.1 - 204 °C
7.10 µin/in-°F

@Temperature 70.0 - 400 °F
13.0 µm/m-°C

@Temperature 21.1 - 427 °C
7.25 µin/in-°F

@Temperature 70.0 - 800 °F
Thermal Conductivity 3.46 W/m-K

@Temperature 93.3 °C
24.0 BTU-in/hr-ft²-°F

@Temperature 200 °F
Component Elements Properties Metric English Comments
Aluminum, Al 1.15 %
1.15 %
Carbon, C 0.40 %
0.40 %
Chromium, Cr 1.6 %
1.6 %
Iron, Fe 95.6 %
95.6 %
as balance
Manganese, Mn 0.60 %
0.60 %
Molybdenum, Mo 0.35 %
0.35 %
Silicon, Si 0.30 %
0.30 %
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