AISI Type 450 Stainless Steel, 25 mm diameter bar, aged at 455°C (850°F)

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AISI Type 450 Stainless Steel, 25 mm diameter bar, aged at 455°C (850°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	Original Value	Comments

Density	7.80 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	411	Converted from Rockwell C hardness.
Hardness, Knoop	451	Converted from Rockwell C hardness.
Hardness, Rockwell C	44
Hardness, Vickers	434	Converted from Rockwell C hardness.
Tensile Strength, Ultimate	1350 MPa
Tensile Strength, Yield	1280 MPa @Strain 0.2 %
Elongation at Break	14.5 %	Gage length is 1 inch (25 mm)
Modulus of Elasticity	204 - 215 GPa
Notched Tensile Strength	2050 MPa
Bulk Modulus	166 GPa
Poissons Ratio	0.283
Shear Modulus	83.9 GPa
Charpy Impact	24.0 - 31.0 J

Thermal Properties	Original Value	Comments
CTE, linear	10.6 µm/m-°C @Temperature 24.0 - 205 °C	annealed and aged at 480°C for 4 hours, air cooled
	10.8 µm/m-°C @Temperature 24.0 - 95.0 °C	annealed and aged at 480°C for 4 hours, air cooled
	11.0 µm/m-°C @Temperature 24.0 - 315 °C	annealed and aged at 480°C for 4 hours, air cooled
	11.3 µm/m-°C @Temperature 25.0 - 370 °C	annealed and aged at 480°C for 4 hours, air cooled
	11.5 µm/m-°C @Temperature 24.0 - 425 °C	annealed and aged at 480°C for 4 hours, air cooled
	11.7 µm/m-°C @Temperature 24.0 - 480 °C	annealed and aged at 480°C for 4 hours, air cooled
	11.75 µm/m-°C @Temperature 24.0 - 595 °C	annealed and aged at 480°C for 4 hours, air cooled
Specific Heat Capacity	0.460 J/g-°C
Thermal Conductivity	20.7 W/m-K	Typical value for stainless steel.
Maximum Service Temperature, Air	425 °C

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

References for this datasheet.

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