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STUDBOLTSÂ HEX HEAD BOLTÂ HEAVY HEX NUTÂ SCREWS
Ferralium Alloy 255
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| Chemical Requirement |
| Ferralium 255 |
| C. |
Mn. |
Si. |
Cr. |
Ni. |
Mo. |
Fe |
Cu |
0.04%
max. |
0.8%
max. |
0.45
max. |
26 |
5.5 |
3.3 |
62 |
1.7 |
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Material Notes:
ferritic-austenitic; high mechanical strength, ductility, and hardness with resistance to corrosion and erosion. Excellent resistance to acids and salts. Duplex alloy with nearly equal portions of austenite and ferrite-matrix phases. Applications include pumps, agitators, valves, and piping for handling wet phosphoric acid slurries, marine scrubbers, pumps and seals, and acid handling equipment |
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Physical Properties |
Metric |
English |
Comments |
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Density |
7.81 g/cc |
0.282 lb/in³ |
 at 20°C (68° |
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Mechanical Properties |
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Hardness, Brinell |
163 |
163 |
 Converted from Rockwell B hardness. |
Hardness, Rockwell B |
95 |
95 |
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Hardness, Vickers |
220 |
220 |
 Converted from Rockwell B hardness. |
Tensile Strength, Ultimate |
800 MPa |
116000 psi |
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Tensile Strength, Yield |
600 MPa |
87000 psi |
 at 0.2% offset |
Elongation at Break |
31 % |
31 % |
 in 50 mm |
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