Standard Grade |
Trade Name |
UNS No. |
DIN |
BS |
JIS |
French Specs |
INCONEL 625 |
UNS N06625 |
NiCr22Mo9Nb |
NA21 |
NCF625TB |
AFNOR NC22DNb |
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Specification |
ASTM B444, ASTM B829, ASME SB 444, ASME SB 829, AMS 5581, BS3074 NA21, AMS 5581 Type 1, DIN 17751, JIS G4904 |
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Typical use
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Alloy 625 (UNS N06625) is a nickel-chromium-molybdenum alloy with an addition of niobium. The addition of molybdenum acts with the niobium to stiffen the alloy matrix, providing a high strength without a strengthening heat treatment. The alloy resists a wide range of corrosive environments and has a good resistance to pitting and crevice corrosion. Alloy 625 is used in chemical processing, aerospace and marine engineering oil & gas, pollution control equipment and nuclear reactors. |
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Weight Formula |
Average Wall: (OD-WT) x WT x 0,0270 = Kg/m (all sizes in mm) |
Chemical Composition Limits |
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Weight % |
Ni |
Cr |
Mo |
Nb + Ta |
Fe |
Ti |
C |
Mn |
Si |
S |
P |
Al |
Co |
Alloy 625 |
58.0 min |
20 - 23 |
8 -10 |
3.15 -4.15 |
5.0 max |
0.40 max |
0.10 max |
0.50 max |
0.50 max |
0.15 max |
0.15 max |
0.40 max |
1.0 max |
Material |
Form and Condition |
Tensile Strength MPa |
Yield Strength (0.2% Offset) MPa |
Elongation 4D(%) |
Hardness HB |
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Ksi |
MPa |
Ksi |
MPa |
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Alloy 625 Tube |
Annealed |
120 |
827 |
60 |
414 |
35 |
- |