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Latrobe LSSâ„¢ 135M Nitriding Steel (ASTM A355 Class A)

Category Metal , Ferrous Metal , Alloy Steel , Carbon Steel , Medium Carbon Steel
Manufacturer Latrobe Steel
Trade Name LSS™
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Latrobe LSSâ„¢ 135M Nitriding Steel (ASTM A355 Class A).pdf
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Material Notes:
TLS 135M Nitriding Steel is a high-aluminum and chromium modification of AISI 4140 alloy steel. The aluminum addition promotes the formation of aluminum nitride compounds when tools manufactured from this steel are surface nitrided. The result is a nitrided surface which exhibits high hardness and good resistance to abrasion and wear, along with a strong and tough inner core in the piece. TLS 135M is supplied in the prehardened condition at a hardness of approximately 28 to 32 Rockwell C. In this condition, tools can be machined or ground, and then nitrided. Additional heat treatment is normally not required. Typical applications for TLS 135M steel include injection and extrusion feed screws, machine parts, pump parts, bushings, shafts, pinions, crankshafts, cams, camshafts, gears, valve sleeves, chuck jaws, dowel pins, and thread guides.Information Provided by Timken Latrobe Steel.Timken sold Latrobe in December 2006. They are now Latrobe Specialty Steels Co.
Physical Properties Metric English Comments
Specific Gravity 7.86 g/cc
7.86 g/cc
Density 7.86 g/cc
0.284 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 22
22
5 inches; Mid-Radius
27
27
3 inches; Mid-Radius
30
30
5 inches; Surface
30
30
3 inches; Surface
30
30
Up to 1.5 inches; Un-Nitrided
Tensile Strength, Ultimate 772 MPa
112000 psi
5 inches; Un-Nitrided
862 MPa
125000 psi
3 inches; Un-Nitrided
965 MPa
140000 psi
Up to 1.5 inches; Un-Nitrided
Tensile Strength, Yield 655 MPa
95000 psi
5 inches; Un-Nitrided
689 MPa
99900 psi
3 inches; Un-Nitrided
827 MPa
120000 psi
Up to 1.5 inches; Un-Nitrided
Modulus of Elasticity 207 GPa
30000 ksi
Machinability 70 - 75 %
70 - 75 %
1% Carbon Steel
Thermal Properties Metric English Comments
CTE, linear 11.68 µm/m-°C

@Temperature 0.000 - 500 °C
6.489 µin/in-°F

@Temperature 32.0 - 932 °F
Thermal Conductivity 51.9 W/m-K
360 BTU-in/hr-ft²-°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 %
Manganese, Mn 0.60 %
0.60 %
Molybdenum, Mo 0.35 %
0.35 %
Silicon, Si 0.30 %
0.30 %
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