Precision Tube Production - Alloys

We manufacture our products to your requirements so contact our sales team on 01844 463103 or email We specialise in small quantity and quick delivery.  

Nickel Alloy 625 Seamless Tube (Inconel 625®) - Specifications UNS N06625,
Ni, Cr21, Mo9, Nb3.5, Fe, ASTM B444, ASTM B829, ASME SB 444, AMS 5581, BS3074 NA21, AMS 5581 Type 1

Weight % Nickel 625 Tube
Ni 58.0 min
Cr 20-23 max
Mo 8-10
Nb + Ta 3.15-4.15
Fe 5.0 max
Ti 0.40 max
C 0.10 max
Mn 0.50 max
Si 0.50 max
S 0.15 max
P 0.15 max
Al 0.40 max
Co 1.0 max

Nickel Alloy 625 (Inconel 625®) is available in Drawn Tube. Nickel 625 tube is available in many sizes from stock, however there is a minimum production of 30m.

Nickel Alloy 625 Precision Seamless Tube is available the following size ranges.
Outside Diameter - 0.25mm (0.010") up to 16.00mm (0.625")
Wall - 0.05mm (0.002") up to 1.00mm (0.040")
Straight Lengths - 1.00mm (0.040") up to 5000.00mm (197")
Coils Lengths - 5 Metres to 15 Metres
Standard Tolerance- OD &ID +/-0.03mm (0.0012")
Wall +/- 10%
Tight Tolerance - OD&ID +/- 0.015mm (0.0006")
Wall +/-3%
Some thin wall tubes up to 25.40 mm (1.000") can be supplied.

Where specific properties or dimensions are required by a customer our technical and quality departments are available to define and produce suitable standards within exiting BS specifications. Contact our sales team on 01844 463103 or email


Every effort is made to ensure that technical specifications are accurate. However, technical specifications included here should be used as a guideline only. All specifications are subject to change without notice

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