Carpenter Custom 455® Stainless Steel, Condition H1000 (Age Hardened 538°C (1000°F))

Subcategory: Ferrous Metal; Metal; Stainless Steel; T 400 Series Stainless Steel

Key Words: UNS S45500; Carpenter Technology Corporation, Carpenter Steel Division; Cartech

Component    Wt. % C Max 0.05   Cr 11 - 12.5   Cu 1.5 - 2.5   Fe 75   Mn Max 0.5

Component    Wt. % Mo Max 0.5   Nb Max 0.5   Nb + Ta 0.1 - 0.5   Ni 7.5 - 9.5   P Max 0.04

Component    Wt. % S Max 0.03   Si Max 0.5   Ta Max 0.5   Ti 0.8 - 1.4

Material Notes:
Iron content calculated as remainder. Data provided by Carpenter Technology Corporation.

Recognizing the need for high-strength alloys with good corrosion resistance to atmospheric environments, the Carpenter Research Laboratory developed Custom 455® stainless, a martensitic age-hardenable stainless steel. This alloy is relatively soft and formable in the annealed condition. A single-step aging treatment develops exceptionally high yield strength with good ductility and toughness. This stainless can be machined in the annealed condition, and welded in much the same manner as other precipitation hardenable stainless steels. Because of its low work-hardening rate, it can be extensively cold formed. The dimensional change during hardening is only about -0.001 in/in, which permits close-tolerance finish machining in the annealed state. Custom 455 stainless represents a significant advancement in the area of precipitation hardening stainless steels. It should be considered where simplicity of heat treatment, ease of fabrication, high strength and corrosion resistance are required in combination.

Because of the unique combination of high strength and corrosion resistance of Custom 455 stainless there are few other alloys available for consideration. Carpenter PH13-8 Mo can be considered where good transverse toughness and ductility are necessary in large sections.

Custom 455® is a registered trademark of Carpenter Technology Corporation.

Physical Properties	Metric	English	Comments
Density	7.76 g/cc	0.28 lb/in³
Mechanical Properties
Hardness, Brinell	411	411	Estimated from Rockwell C for 3000 kg load, 10 mm ball Brinell measurement.
Hardness, Knoop	450	450	Estimated from Rockwell C
Hardness, Rockwell C	44	44
Hardness, Vickers	430	430	Estimated from Rockwell C
Tensile Strength, Ultimate	1413 MPa	205000 psi
Tensile Strength, Ultimate at Elevated Temperature	1062 MPa	154000 psi	427°C
Tensile Strength, Ultimate at Elevated Temperature	1200 MPa	174000 psi	316°C
Tensile Strength, Ultimate at Elevated Temperature	1517 MPa	220000 psi	-73°C
Tensile Strength, Ultimate at Elevated Temperature	1758 MPa	255000 psi	-184°C
Tensile Strength, Ultimate at Elevated Temperature	814 MPa	118000 psi	538°C
Tensile Strength, Yield	1345 MPa	195000 psi	0.2% Offset
Tensile Strength, Yield at Elevated Temperature	1020 MPa	148000 psi	0.2% Offset; 427°C
Tensile Strength, Yield at Elevated Temperature	138 MPa	20000 psi	0.2% Offset; 316°C
Tensile Strength, Yield at Elevated Temperature	738 MPa	107000 psi	0.2% Offset; 538°C
Elongation at Break	14 %	14 %	In 4D
Elongation at Break at Elevated Temperature	13 %	13 %	-184°C
Elongation at Break at Elevated Temperature	13 %	13 %	-73°C
Elongation at Break at Elevated Temperature	14 %	14 %	In 4D; 316°C
Elongation at Break at Elevated Temperature	15 %	15 %	In 4D; 427°C
Elongation at Break at Elevated Temperature	20 %	20 %	In 4D; 538°C
Reduction of Area	45 %	45 %	-184°C
Reduction of Area	50 %	50 %	-73°C
Reduction of Area	55 %	55 %
Reduction of Area	60 %	60 %	316°C
Reduction of Area	65 %	65 %	427°C
Reduction of Area	75 %	75 %	538°C
Modulus of Elasticity	200 GPa	29000 ksi
Notched Tensile Strength	1517 MPa	220000 psi	-184°C
Notched Tensile Strength	2000 MPa	290000 psi
Notched Tensile Strength	2068 MPa	300000 psi	-73°C
Poisson's Ratio	0.3	0.3
Charpy Impact	16 J	11.8 ft-lb	V-notch; -73°C
Charpy Impact	30 J	22.1 ft-lb	V-notch
Charpy Impact	5 J	3.69 ft-lb	V-notch; -184°C
Fatigue Strength	630 MPa	91400 psi	R.R. Moore Test, Smooth Rotating Beam, 1E+7 Cycles
Shear Modulus	76.9 GPa	11200 ksi	Calculated
Electrical Properties
Electrical Resistivity	7.58e-005 ohm-cm	7.58e-005 ohm-cm	Condition H950 at Room Temp.
Thermal Properties
CTE, linear 20°C	10.6 µm/m-°C	5.89 µin/in-°F	22-93ºC
CTE, linear 250°C	11.2 µm/m-°C	6.22 µin/in-°F	22-260ºC
CTE, linear 500°C	12 µm/m-°C	6.67 µin/in-°F	22-482ºC