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
Price	EMAIL US sales@lookpolymers.com

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
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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