Nickel AlloysAMS 5666 (Alloy 625) Bar & Forgings

A nickel-chromium-molybdenum-niobium alloy with excellent resistance to a variety of corrosive media.

An American aerospace standard for NiCr22Mo9Nb4, nickel alloy 625. The high tensile creep and rupture strength; outstanding fatigue and thermal-fatigue strength; oxidation resistance and excellent weldability/brazeability are the properties of alloy 625 that make it of interest within aerospace applications.

Alloy 625 is a nickel-chromium based alloy with min 58% nickel which gains its stiffening effect through additions of molybdenum and niobium thus eliminating the need for this alloy to be aged.

It has superior resistance to a wide range of corrosive environments as well as the high temperature effects of oxidation and carburisation.

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Related Specifications

ASTM B446-03 (2014) UNS N06625
NACE MR0175/ISO 15156-3

Properties

Chemical Composition

Chemical Element	% Present
Aluminium (Al)	0.00 - 0.40
Carbon (C)	0.00 - 0.10
Chromium (Cr)	20.00 - 23.00
Cobalt (Co)	0.00 - 1.00
Columbium + Tantalum (Cb+Ta)	3.15 - 4.15
Iron (Fe)	0.00 - 5.00
Manganese (Mn)	0.00 - 0.50
Molybdenum (Mo)	8.00 - 10.00
Nickel (Ni)	58.00 - 0.00
Phosphorous (P)	0.00 - 0.02
Silicon (Si)	0.00 - 0.50
Sulphur (S)	0.00 - 0.02
Titanium (Ti)	0.00 - 0.40

Mechanical Properties

Mechanical Property	Value
Elongation A50 mm	30 Min %
Proof Stress	415 Min MPa
Tensile Strength	830 Min MPa

Mechanical Property	Value
Elongation A50 mm	25 Min %
Proof Stress	345 Min MPa
Tensile Strength	760 Min MPa

Physical Property	Value
Density	8.47 g/cm³
Melting Point	1290-1350 °C
Modulus of Elasticity	209 GPa

Applications

Aircraft engine components

Characteristics

Exceptional resistance to pitting, crevice corrosion, erosion and intergranular corosion
Immunity to chloride-induced stress corrosion cracking
Good resistance to mineral acids such as nitric, phosphoric, sulfuric, and hydrochloric acids
Good resistance to alkalis and organic acids
Good mechanical properties
Excellent weldability
Low magnetic permeability
Non magnetic and spark resistant

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Disclaimer

This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon. Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed S online) and manufacturers' data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources. Material supplied by the Company may vary significantly from this data but will conform to all relevant and applicable standards. As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied. Advice given by the Company to any third party is given for that party's assistance only and without liability on the part of the Company. All transactions are subject to the Company's current Conditions of Sale. The extent of the Company's liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.

Nickel AlloysAMS 5666 (Alloy 625) Bar & Forgings

A nickel-chromium-molybdenum-niobium alloy with excellent resistance to a variety of corrosive media.

Range Enquiry

Related Specifications

Properties

Alloy 625

ASTM B446-03

Hot Worked Rod & Bar, Annealed Up to 4in (102mm) incl.

ASTM B446-03 UNS N06625 Grade 1

Hot Worked Rod & Bar, Annealed Over 4in (102mm) - 10 in (254mm)

ASTM B446-03 UNS N06625 Grade 1

Applications

Characteristics

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