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ATI Allegheny Ludlum 425 Mod Martensitic Stainless Steel

Category Metal , Ferrous Metal , Martensitic , Stainless Steel , T 400 Series Stainless Steel
Manufacturer ATI Allegheny Ludlum
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF ATI Allegheny Ludlum 425 Mod Martensitic Stainless Steel.pdf
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Material Notes:
Characteristics: superior wear resistance, hardenable, excellent corrosion resistance. Applications:cutlery, dental and surgical instruments, nozzles, valve parts, hardened steel ball and seats for oil well pumps, separating screens and strainers, springs, shears, and wear surfaces. Information provided by Allegheny Ludlum
Physical Properties Metric English Comments
Specific Gravity 7.72 g/cc
7.72 g/cc
Density 7.68 g/cc
0.277 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell B 93
93
Hardness, Rockwell C 29
29
Hardened+Tempered 1200°F
43
43
Hardened+Tempered 1000°F
50
50
Hardened+Tempered 550°F
52
52
Hardened+Tempered 900°F
53
53
Hardened+Tempered 600°F
53
53
Hardened+Tempered 800°F
53
53
Hardened+Tempered 400°F
Tensile Strength, Ultimate 593 MPa
86000 psi
Annealed, Fine blanking quality
648 MPa
94000 psi
Annealed
936 MPa
136000 psi
Hardened 1900°F, Tempered 1200°F
1434 MPa
208000 psi
Hardened 1900°F, Tempered 1000°F
1619 MPa
234800 psi
Hardened 1900°F, Tempered 900°F
1690 MPa
245000 psi
Hardened 1900°F, Tempered 600°F
1729 MPa
250800 psi
Hardened 1900°F, Tempered 550°F
1759 MPa
255100 psi
Hardened 1900°F, Tempered 800°F
1868 MPa
270900 psi
Hardened 1900°F, Tempered 400°F
Tensile Strength, Yield 743 MPa
108000 psi
Hardened 1900°F, Tempered 1200°F
1218 MPa
176700 psi
Hardened 1900°F, Tempered 1000°F
1351 MPa
195900 psi
Hardened 1900°F, Tempered 600°F
1360 MPa
197000 psi
Hardened 1900°F, Tempered 550°F
1368 MPa
198400 psi
Hardened 1900°F, Tempered 900°F
1385 MPa
200900 psi
Hardened 1900°F, Tempered 400°F
1452 MPa
210600 psi
Hardened 1900°F, Tempered 800°F
310 MPa

@Strain 0.200 %
45000 psi

@Strain 0.200 %
Annealed, fine blanking quality
379 MPa

@Strain 0.200 %
55000 psi

@Strain 0.200 %
Annealed
Elongation at Break 24 %
24 %
Annealed
25 %
25 %
Annealed, Fine blanking quality
Thermal Properties Metric English Comments
CTE, linear 11.6 µm/m-°C

@Temperature 20.0 - 200 °C
6.44 µin/in-°F

@Temperature 68.0 - 392 °F
12.8 µm/m-°C

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

@Temperature 68.0 - 1110 °F
Specific Heat Capacity 0.460 J/g-°C
0.110 BTU/lb-°F
Thermal Conductivity 24.2 W/m-K

@Temperature 100 °C
168 BTU-in/hr-ft²-°F

@Temperature 212 °F
Melting Point 1427 - 1510 °C
2601 - 2750 °F
Solidus 1427 °C
2601 °F
Liquidus 1510 °C
2750 °F
Component Elements Properties Metric English Comments
Carbon, C 0.50 - 0.55 %
0.50 - 0.55 %
Chromium, Cr 13 - 14 %
13 - 14 %
Iron, Fe 81.7 - 85.7 %
81.7 - 85.7 %
as balance
Manganese, Mn <= 1.0 %
<= 1.0 %
Molybdenum, Mo 0.80 - 1.2 %
0.80 - 1.2 %
Nickel, Ni <= 0.50 %
<= 0.50 %
Phosphorous, P <= 0.040 %
<= 0.040 %
Silicon, Si <= 1.0 %
<= 1.0 %
Sulfur, S <= 0.030 %
<= 0.030 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.0000610 ohm-cm
0.0000610 ohm-cm
Descriptive Properties Value Comments
Corrosion Rate mils per year 0.593 (5% Phosphoric Acid at 49°C)
Hardened martensitic grades were tested after tempering at 204°C
4.79 (5% Acetic Acid at 49°C)
Hardened martensitic grades were tested after tempering at 204°C
Pitting Potential, Volts vs. Sat. Calomel Electrode 0.619
100 ppm Chloride solution at 24°C, pH5. Samples had ground surface. Hardened martensitic grades were tested after tempering at 204°C.
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