Alloy 625 Technical Information
Robert-James Sales, Inc.
   Piping Definitions Tube Stainless Steel Alloys Specifications Conversion Calculators 

 
A l l o y s

Alloy 20
2205
Alloy C-276
317L
310S
321/321H
347/347H
254SMO
AL-6XN
6061 T6
904L
410
304/304L
316/316L
Alloy 200
Alloy 400
Alloy 600
Alloy 625
Alloy 800/800H/800HP
Alloy 825

Alloy 625
Chemical Composition %

C Cr Fe Ni Al Ti Co + TA
Max   Max Min Max Max  
0.10 20.0-23.0 5.0 58.0 0.40 0.40 3.15-4.15


AVAILABILITY
Welded Pipe 1/2" - 8"
Butt Weld Fittings 1/2" - 8"
Flanges 1/2" - 8"
Bar 1" - 4-1/2"

SPECIFICATION
ASTM 8443, 8705, B366, B446, B564
ASME SB443, SB705, SB366, SB446, SB564

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 deg.F. Alloy 625 strength is derived from the stiffening effect of molybdenium 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 brazeability 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.

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