AISI Type 450 Stainless Steel, 25 mm diameter bar, aged at 540°C (1000°F)

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AISI Type 450 Stainless Steel, 25 mm diameter bar, aged at 540°C (1000°F)
Categories:	Metal; Ferrous Metal; Heat Resisting; Stainless Steel; T S40000 Series Stainless Steel
Material Notes:	Martensitic, age-hardenable, very good corrosion resistance with moderate strength, resists atmospheric corrosion including salt water atmospheres, excellent resistance to rusting and pitting in 5 and 20% salt spray at 35°C and oxidation up to 650°C, maximum service temperature for continuous service is 425°C. Niobium content minimum is 8 times the carbon content.
Key Words:	UNS S45000, AMS 5763, ASME SA564 (XM-25), T S45000, ASME SA 705 (XM-25), ASTM A564 (XM-25), ASTM A693 (XM-25), ASTM A705 (XM-25)
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Physical Properties	Metric	English	Comments

Density	7.80 g/cc	0.282 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	360	360	Converted from Rockwell C hardness.
Hardness, Knoop	392	392	Converted from Rockwell C hardness.
Hardness, Rockwell C	39	39
Hardness, Vickers	378	378	Converted from Rockwell C hardness.
Tensile Strength, Ultimate	1195 MPa	173300 psi
Tensile Strength, Yield	1165 MPa @Strain 0.2 %	169000 psi @Strain 0.2 %
Elongation at Break	16.8 %	16.8 %	Gage length 1 in. (25 mm)
Modulus of Elasticity	204 - 215 GPa	29600 - 31200 ksi
Notched Tensile Strength	1890 MPa	274000 psi
Bulk Modulus	166 GPa	24100 ksi
Poissons Ratio	0.283	0.283
Shear Modulus	83.9 GPa	12200 ksi
Charpy Impact	68.0 - 71.0 J	50.2 - 52.4 ft-lb

Thermal Properties	Metric	English	Comments
CTE, linear	10.6 µm/m-°C @Temperature 24.0 - 205 °C	5.89 µin/in-°F @Temperature 75.2 - 401 °F	annealed and aged at 480°C for 4 hours, air cooled
	10.8 µm/m-°C @Temperature 24.0 - 95.0 °C	6.00 µin/in-°F @Temperature 75.2 - 203 °F	annealed and aged at 480°C for 4 hours, air cooled
	11.0 µm/m-°C @Temperature 24.0 - 315 °C	6.11 µin/in-°F @Temperature 75.2 - 599 °F	annealed and aged at 480°C for 4 hours, air cooled
	11.3 µm/m-°C @Temperature 25.0 - 370 °C	6.28 µin/in-°F @Temperature 77.0 - 698 °F	annealed and aged at 480°C for 4 hours, air cooled
	11.5 µm/m-°C @Temperature 24.0 - 425 °C	6.39 µin/in-°F @Temperature 75.2 - 797 °F	annealed and aged at 480°C for 4 hours, air cooled
	11.7 µm/m-°C @Temperature 24.0 - 480 °C	6.50 µin/in-°F @Temperature 75.2 - 896 °F	annealed and aged at 480°C for 4 hours, air cooled
	11.75 µm/m-°C @Temperature 24.0 - 595 °C	6.528 µin/in-°F @Temperature 75.2 - 1100 °F	annealed and aged at 480°C for 4 hours, air cooled
Specific Heat Capacity	0.460 J/g-°C	0.110 BTU/lb-°F
Thermal Conductivity	20.7 W/m-K	144 BTU-in/hr-ft²-°F	Typical value for stainless steel.
Maximum Service Temperature, Air	425 °C	797 °F

Component Elements Properties	Metric	English	Comments
Carbon, C	<= 0.050 %	<= 0.050 %
Chromium, Cr	15 %	15 %
Copper, Cu	1.5 %	1.5 %
Iron, Fe	74 %	74 %
Manganese, Mn	<= 1.0 %	<= 1.0 %
Molybdenum, Mo	0.75 %	0.75 %
Nickel, Ni	6.0 %	6.0 %
Niobium, Nb (Columbium, Cb)	>= 0.40 %	>= 0.40 %
Phosphorus, P	<= 0.030 %	<= 0.030 %
Silicon, Si	<= 1.0 %	<= 1.0 %
Sulfur, S	<= 0.030 %	<= 0.030 %

References for this datasheet.

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