Nickel Alloy 825 Fittings (UNS N08825)

We supply Alloy 825 fittings for demanding piping systems in corrosive industrial environments. This titanium-stabilized nickel-iron-chromium alloy offers strong resistance to oxidizing and reducing acids, chloride stress-corrosion cracking and localized corrosion. Seamless buttweld fittings from stock or forged socket-weld and threaded options for project-based requirements, available with full certification.

High-quality Alloy 825 fittings

Designed for critical piping in corrosive service

Buttweld fittings

Elbows, tees, reducers and caps from stock

Seamless & welded

Seamless stock with welded options on request

Forged fitting options

Socket-weld and threaded fittings available

Package supply

Combine fittings with matching pipes and flanges

Certified

EN 10204 3.1 or EN 10204 3.2 certified

Send your enquiry

Alloy 825 fittings in stock

Responsive Specificatie Tabel

Property	Value
Standard	ASTM B366
UNS	N08825
Available sizes	½″–4″
Wall thickness range	Schedule 10S to Schedule XXS
Typical items	elbows, tees, reducers and caps

Need Alloy 825 fittings for a specific piping package? We supply seamless buttweld fittings from stock in UNS N08825 / ASTM B366. Typical stock items include elbows, tees, reducers and caps, with welded buttweld fittings and forged socket-weld or threaded fittings available on request.

Certified supply & additional information

EN 10204 3.1 or EN 10204 3.2 certified
Material supplied in accordance with applicable international specifications
Stock or production supply
European, South Korean or North-American manufacturers
Approved by major oil, gas and petrochemical companies
Stock availability subject to current inventory

Upon request‍

Welded buttweld fittings
Forged socket-weld or threaded fittings (3000, 6000, 9000 lbs)
Additional testing
Third-party inspection

Chemical composition

The chemical composition of Alloy 825 / UNS N08825 is designed to provide strong corrosion resistance across a wide range of industrial environments. The alloy combines nickel, chromium, iron, molybdenum, copper and titanium to support reliable performance in corrosive piping systems.

Below chemical composition limits are provided for quick reference. Final compliance is confirmed by the Mill Test Certificate and the applicable order specification.

Element	Limit (%)
Nickel (Ni)	38.0 – 46.0
Chromium (Cr)	19.5 – 23.5
Iron (Fe)	22.0 min.
Molybdenum (Mo)	2.5 – 3.5
Copper (Cu)	1.5 – 3.0
Titanium (Ti)	0.6 – 1.2
Carbon (C)	0.05 max.
Manganese (Mn)	1.0 max.
Silicon (Si)	0.5 max.
Sulfur (S)	0.03 max.
Aluminum (Al)	0.2 max.

Typical physical and mechanical properties of Alloy 825

The values below provide a general indication of the typical physical and mechanical properties of Alloy 825 across a range of temperatures. Actual values may vary depending on product form, size, supply condition and final order specification.

Property	Unit	70°F	200°F	400°F	600°F	800°F	1000°F	1200°F
Density	lbs/in³	0.294	-	-	-	-	-	-
Thermal Expansion	x10^-6/°F	-	7.8	8.3	8.5	8.7	9.5	9.6
Elastic Modulus	10³ ksi	28.3	27.9	27.1	26.0	25.2	23.52	22.37
Poisson’s Ratio	-	0.30	0.30	0.30	-	-	0.367	0.377
Thermal Conductivity	Btu-in/hr-ft²-°F	-	85	97.5	109.6	119.7	139	152
Specific Heat	Btu/lb-°F	0.105	0.11	0.117	0.123	0.123	0.13	0.14
Yield Strength	ksi	35	30	26	25	23	12	11
Tensile Strength	ksi	85	77	75	73	71	52	44

Get your quote

Please fill in the contactform or send your inquiry. We’ll confirmavailability from stock or the best supply route for your lead time.

Thank you! Your submission has been received!

Oops! Something went wrong while submitting the form.

Mail us

sales@maass-special-alloys.com

Call us

+31 (0)30 8200 370