455
455 is a martensitic age-hardenable stainless steel with high strength and good corrosion resistance to atmospheric environments. This alloy is easily formable in the annealed condition. A single step aging treatment develops exceptionally high yield strength with good ductility and toughness. 455 can be machined in the annealed condition and welded in similar ways as other precipitation hardenabe stainless steels.
Chemistry
| MIN |
11.0 |
7.50 |
1.50 |
- |
- |
0.80 |
- |
0.10 |
- |
- |
- |
- |
| MAX |
12.5 |
9.50 |
2.50 |
0.50 |
0.50 |
1.40 |
0.50 |
0.50 |
0.30 |
0.04 |
0.05 |
balance |
Specifications
AMS 5617
ASME SA 564
ASTM F 899
BOEING HMS 6 1093
UNS S45500
Inventory
455 Round Bar
Features
- Excellent oxidation resistance to 1100°F
- Exceptionally high strength and good ductility
- Good corrosion to atmospheric environments
- Ease of fabrication
Applications
- Medical instruments
- Small turbine engine shafts
- Extruder screws
Physical Properties
Density: 0.280 lb/inch3
Specific Gravity: 7.76
Poisson's Ratio: 0.30
Electrical Resistivity at 70°F: 545 ohm - circ mil/ft
| Temperature,°F |
70 |
200 |
300 |
500 |
700 |
900 |
| Coefficient of Thermal Expansion*, in/in°F x 10-6 |
-- |
5.9 |
6.03 |
6.2 |
6.45 |
6.68 |
| Temperature,°F |
70 |
212 |
392 |
572 |
752 |
932 |
| Thermal Conductivity, BTU • ft/ft2 • hr • °F |
-- |
125.0 |
137.0 |
148.0 |
162.0 |
172.0 |
* 70°F to indicated temperature.
Mechanical Properties
Typical Room Temperature Tensile Properties
| Condition |
A |
H 950 |
H 1000 |
H 1050 |
| Ultimate Tensile Strength, ksi |
140 |
230 |
205 |
190 |
| 0.2% Yield Strength, ksi |
115 |
220 |
195 |
175 |
| Elongation in 4D, % |
12 |
10 |
12 |
14 |
| Reduction of Area, % |
50 |
45 |
45 |
50 |
| Charpy V-Notch, ft-lb |
-- |
8 |
12 |
25 |
| Rockwell C |
31 |
48 |
45 |
40 |
Typical Elevated Temperature Tensile Properties, Condition H 1000
| Temperature, °F |
70 |
600 |
800 |
1000 |
| Ultimate Tensile Strength, ksi |
205 |
174 |
154 |
118 |
| 0.2% Yield Strength, ksi |
195 |
165 |
148 |
110 |
| Elongation in 4D, % |
14 |
14 |
15 |
20 |
| Reduction of Area, % |
55 |
60 |
65 |
75 |
| Rockwell C |
44 |
44 |
44 |
44 |
Typical Elevated Temperature Tensile Properties, Condition H 950
| Temperature, °F |
70 |
600 |
800 |
1000 |
| Ultimate Tensile Strength, ksi |
230 |
195 |
175 |
130 |
| 0.2% Yield Strength, ksi |
220 |
185 |
163 |
110 |
| Elongation in 4D, % |
12 |
12 |
14 |
18 |
| Reduction of Area, % |
50 |
50 |
60 |
70 |
| Rockwell C |
48 |
48 |
48 |
48 |
Typical Elevated Temperature Tensile Properties, Condition H 900
| Temperature, °F |
70 |
500 |
600 |
700 |
800 |
| Ultimate Tensile Strength, ksi |
245 |
214 |
204 |
195 |
180 |
| 0.2% Yield Strength, ksi |
237 |
199 |
188 |
180 |
166 |
| Elongation in 4D, % |
11 |
10 |
11 |
12 |
14 |
| Reduction of Area, % |
48 |
49 |
50 |
52 |
56 |
| Rockwell C |
49 |
49 |
49 |
49 |
49 |
