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Latrobe 440â„¢ N-DUR High Quality Martensitic Stainless Steel

Category Metal , Ferrous Metal , Martensitic , Stainless Steel
Manufacturer Latrobe Steel
Trade Name 440™
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Latrobe 440â„¢ N-DUR High Quality Martensitic Stainless Steel.pdf
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Material Notes:
440 N-DUR is a 15.0% chromium stainless steel that provides the corrosion resistance of 440 C with the added benefit of improved carbide size and distribution for noiseless miniature precision bearing operation. The alloy can be through-hardened to achieve a minimum hardness of Rockwell C 60. The optimized alloy additions of C, N, Cr, and Mo provide a combination of the best carbide structure, corrosion resistance and heat treat response. The high hardness and corrosion resistance make 440 N-DUR a suitable candidate for use in miniature bearing, cutlery, medical implement, and other special applications.Tensile properties are for Austenitized at 1975°F, warm oil quenched, subzero treated to -120°F, and tempered at 350°FInformation Provided by Timken Latrobe Steel.Timken sold Latrobe in December 2006. They are now Latrobe Specialty Steels Co.
Physical Properties Metric English Comments
Density 7.67 g/cc
0.277 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 61
61
RT
50

@Temperature 371 °C
50

@Temperature 700 °F
55

@Temperature 260 °C
55

@Temperature 500 °F
Tensile Strength, Ultimate 2230 MPa
324000 psi
Tensile Strength, Yield 1910 MPa

@Strain 0.200 %
277000 psi

@Strain 0.200 %
Elongation at Break 2.3 %
2.3 %
Reduction of Area 2.1 %
2.1 %
Modulus of Elasticity 193 - 207 GPa
28000 - 30000 ksi
Thermal Properties Metric English Comments
CTE, linear 11.4 µm/m-°C

@Temperature 20.0 - 315 °C
6.33 µin/in-°F

@Temperature 68.0 - 599 °F
12.3 µm/m-°C

@Temperature 20.0 - 600 °C
6.83 µin/in-°F

@Temperature 68.0 - 1110 °F
Component Elements Properties Metric English Comments
Carbon, C 0.58 %
0.58 %
Chromium, Cr 15 %
15 %
Iron, Fe 82.989 %
82.989 %
Manganese, Mn 0.45 %
0.45 %
Molybdenum, Mo 0.50 %
0.50 %
Nitrogen, N 0.17 %
0.17 %
Phosphorous, P 0.010 %
0.010 %
Silicon, Si 0.30 %
0.30 %
Sulfur, S 0.0010 %
0.0010 %
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