Related Conditions
Precipitation Hardened, FV520B
Double Over-Aged
The double over-aged condition of FV520B undergoes an additional process during its heat treatment at a lower temperature of 550°C.
This additional process is used to achieve the mechanical properties of the steel specification requirements (by exposing them to heat). For example, FV520B has high impact resistance in this Double Over-Aged (550°C) condition.
The mechanical properties of this condition are typically the following:
UTS: 925/1080 MPa
YS: 800 MPa min.
Hardness: 276-321 HB
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6
10
12.954
14.287
14.808
16.256
20.243
22.479
25.654
30.251
32.258
35.229
38.404
40.309
45.313
51.104
57.505
60.325
63.881
65.35
70.357
76.581
80.5
82.931
85.752
90.5
95.631
101.981
108.331
114.681
120.65
127.762
133.35
140.5
152.4
165.1
180
181
203.2
218
230
231
241.3
265
280
310
Enquire Now
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- 6
- 10
- 12.954
- 14.287
- 14.808
- 16.256
- 20.243
- 22.479
- 25.654
- 30.251
- 32.258
- 35.229
- 38.404
- 40.309
- 45.313
- 51.104
- 57.505
- 60.325
- 63.881
- 65.35
- 70.357
- 76.581
- 80.5
- 82.931
- 85.752
- 90.5
- 95.631
- 101.981
- 108.331
- 114.681
- 120.65
- 127.762
- 133.35
- 140.5
- 152.4
- 165.1
- 180
- 181
- 203.2
- 218
- 230
- 231
- 241.3
- 265
- 280
- 310
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Supplied Condition:
- Commercial grade only
- hardness 321 HB
Chemical Composition (%):
| C | Cr | Ni | Mo |
| ≤0,7 | 13,0-15,0 | 5,0-6,0 | 1,2-2,0 |
- Improved intergranular & pitting corrosion compared to 17/4PH
- Improved corrosion resistance in specific environments
- Excellent anti-galling characteristics
- Good weldability
- High impact resistance in the 550℃ ‘aged’ condition
- Commonly employed in aerospace, oil & gas, and other industries where high-performance materials are needed.
- Gears, bolts, rotor blades
- Centrifugal compressors
- Impeller blades
Supplied Condition:
- Commercial grade only
- hardness 321 HB
Chemical Composition (%):
| C | Cr | Ni | Mo |
| ≤0,7 | 13,0-15,0 | 5,0-6,0 | 1,2-2,0 |
- Improved intergranular & pitting corrosion compared to 17/4PH
- Improved corrosion resistance in specific environments
- Excellent anti-galling characteristics
- Good weldability
- High impact resistance in the 550℃ ‘aged’ condition
- Commonly employed in aerospace, oil & gas, and other industries where high-performance materials are needed.
- Gears, bolts, rotor blades
- Centrifugal compressors
- Impeller blades
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