AISI Type 450 Stainless Steel, 25 mm diameter bar, aged at 480°C (900°F)

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AISI Type 450 Stainless Steel, 25 mm diameter bar, aged at 480°C (900°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	395	Converted from Rockwell C hardness.
Hardness, Knoop	432	Converted from Rockwell C hardness.
Hardness, Rockwell C	42.5
Hardness, Vickers	416	Converted from Rockwell C hardness.
Tensile Strength, Ultimate	1345 MPa
	580 MPa @Temperature 565 °C
	1035 MPa @Temperature 425 °C
	1105 MPa @Temperature 315 °C
	1415 MPa @Temperature -18.0 °C
	1490 MPa @Temperature -73.0 °C
	1795 MPa @Temperature -195 °C
Tensile Strength, Yield	1280 MPa @Strain 0.2 %
	525 MPa @Strain 0.2 %, Temperature 565 °C
	903 MPa @Strain 0.2 %, Temperature 425 °C
	951 MPa @Strain 0.2 %, Temperature 315 °C
	1340 MPa @Strain 0.2 %, Temperature -18.0 °C
	1425 MPa @Strain 0.2 %, Temperature -73.0 °C
	1715 MPa @Strain 0.2 %, Temperature -195 °C
Elongation at Break	13.9 %	Gage length 1 in (25 mm)
	4.5 % @Temperature -195 °C	Gage length 1 in (25 mm)
	12 % @Temperature 315 °C	Gage length 1 in (25 mm)
	12.4 % @Temperature 425 °C	Gage length 1 in (25 mm)
	15.2 % @Temperature -18.0 °C	Gage length 1 in (25 mm)
	15.7 % @Temperature -73.0 °C	Gage length 1 in (25 mm)
	24 % @Temperature 565 °C	Gage length 1 in (25 mm)
Modulus of Elasticity	204 - 215 GPa
Notched Tensile Strength	2050 MPa
	1770 MPa @Temperature -73.0 °C
	2110 MPa @Temperature -18.0 °C
Bulk Modulus	166 GPa
Poissons Ratio	0.283
Shear Modulus	83.9 GPa
Charpy Impact	52.0 - 57.0 J
	1.40 J @Temperature -195 °C
	5.40 J @Temperature -73.0 °C
	22.0 J @Temperature -18.0 °C
	54.0 J @Temperature 315 °C
	57.0 J @Temperature 425 °C
	89.0 J @Temperature 565 °C

Thermal Properties	Original Value	Comments
CTE, linear	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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