625
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AVAILABILITY |
SPECS |
Welded Pipe 1/2" –8" |
B444, B705 |
Butt-Weld Fittings 1/2" – 8" |
B366 |
Flanges 1/2" – 8" |
B444, B564, B16.5 |
Bar 1" – 6" |
B446, B564 |
Forgings |
B564 |
CHEMICAL COMPOSITION %
MAX |
|
MAX |
MIN |
MAX |
MAX |
|
0.10 |
20.0-23.0 |
5.0 |
58.0 |
0.40 |
0.40 |
3.15-4.15 |
DESCRIPTION
Alloy 625 is a Nickel-Chromium alloy used for its high strength, excellent fabricability and outstanding corrosion resistance. Service temperatures
range from cryogenic to 1800° F. Alloy 625 strength is derived from the stiffening effect of molybdenum and columbium on its Nickel-Chromium
matrix; thus precipitation-hardening treatments are not required. This combination of elements also is responsible for superior resistance to a wide
range of corrosive environments of unusual severity as well as to high-temperature effects such as oxidation and carburization.
DESIGN FEATURES
- Outstanding resistance to pitting, crevice corrosion, impingement corrosion and intergranular attack.
- Almost complete freedom from Chloride-induced stress corrosion cracking.
- Good resistance to mineral acids, such as nitric, phosphoric, sulphuric and hydrochloric acids.
- Good resistance to alkalis and organic acids.
- Good mechanical properties.
TYPICAL APPLICATIONS
- Used for structures in contact with seawater and subject to high mechanical stresses
- Flue gas scrubbers components
- Chimney linings
- Superphosphoric acid production equipment
- Sour gas production tubes
- Offshore industry, marine equipment
- High tensile, creep, rupture strength, outstanding fatigue and thermal-fatigue strength; oxidation resistance; and excellent weldability and braze-ability make it a good choice in the aerospace industry
TENSILE REQUIREMENTS
Tensile Strength
(KSI)
120 |
Yield Strength
(KSI)
60 |
KSI can be converted to MPA (Megapascals) by multiplying by 6.895.
MultAlloy stocks 321 with high carbon to meet 321/321H specifications. |
