Incoloy 825 Round Bar
➡️ Alloy 825 | UNS N08825 | EN 2.4858
➡️ ASTM, EN, JIS & International Standards
➡️ Supply Conditions
➡️ Multiple Diameters & Supply Lengths
➡️ Global Export & International Delivery
Country of Origin:
Europe, Japan, USA
Material Type:
Nickel Alloy
UNS Number:
N08825
Wr. No.:
2.4858
MTC Available:
EN 10204 3.1
Product Description for Incoloy 825 Round Bar
Incoloy 825 is a nickel-iron-chromium alloy with molybdenum, copper and titanium additions, UNS N08825 and Werkstoff 2.4858. Bar ships to ASTM B425 with ASME SB-425 for pressure equipment.
The composition is 38-46% nickel, 19.5-23.5% chromium, 2.5-3.5% molybdenum and 1.5-3.0% copper, with 22% minimum iron and titanium at 0.6-1.2%. Each addition does a specific job. Nickel resists chloride stress corrosion cracking. Molybdenum handles pitting and crevice corrosion. Copper gives resistance in sulphuric and phosphoric acid, the same role it plays in 904L. Titanium stabilises carbon so the alloy resists intergranular attack after welding without post-weld heat treatment.
The result is an alloy that handles both oxidising and reducing acid conditions, and it is widely used in sulphuric acid service, pickling operations and sour oilfield environments.
It is not a high-temperature alloy. Service is normally limited to around 540 C, and prolonged exposure above that risks sensitisation and phase precipitation that reduce corrosion resistance.
Bar is supplied annealed. The alloy is solid-solution strengthened, so heat treatment cannot raise strength.
ASTM G28 intergranular corrosion testing is the usual supplementary requirement, and NACE MR0175 compliance should be requested where sour service applies, since neither is covered by the standard mechanical tests.
The usual range is 6 mm to 250 mm, as random lengths or cut to size. The alloy is non-magnetic and machining is demanding, with the rapid work hardening typical of solid-solution nickel alloys.
Machining is demanding, with the rapid work hardening typical of solid-solution nickel alloys, and welding uses matching or over-alloyed nickel-base filler.
Typical work is sulphuric and phosphoric acid plant, pickling equipment, sour service oilfield hardware, chemical process components and marine machinery.
Common Applications of Incoloy 825 Round Bar
➡️ Machined shafts, spindles, valve stems, pump sleeves and pins for food, beverage, dairy and pharmaceutical equipment, where the passive chromium oxide film resists both product acids and caustic clean-in-place chemicals.
➡️ Fasteners, studs, bolts, threaded rod and anchor components produced from bar stock, chosen for corrosion resistance combined with the ductility needed for cold heading and thread rolling.
➡️ Chemical, water treatment and general process plant parts such as agitator shafts, flange blanks, nozzles and support components handling water, steam and mildly corrosive media free of significant chlorides.
➡️ Architectural and structural hardware including handrail stanchions, balustrade fittings, tension rods and bollards, where a bright ground or polished bar finish provides both appearance and low maintenance.
International Equivalent Grade for Alloy 825 Round Bar
Standard
Country / Region
Grade
ASTM B425
USA
UNS N08825 (rod and bar)
ASME SB-425
USA
UNS N08825
ASTM B564
USA
UNS N08825 (forgings)
DIN 17744
Europe / EU
2.4858 (NiCr21Mo)
BS 3076
United Kingdom
NA 16
Technical Specification for Incoloy 825 Round Bar
Specification
Value
Unit
Material
Nickel alloy
-
Grade
Incoloy 825 / UNS N08825 / 2.4858
-
Product Form
Round bar / rod
-
Standard
ASTM B425, ASME SB-425
-
Diameter
6 - 250 (typical supply range)
mm
Length
3 - 6 (random), or cut to length
m
Manufacturing Process
Hot rolled or forged, annealed
-
Production Route
EAF + AOD refining
-
Surface Finish
Hot-rolled and pickled, peeled, turned, centreless ground, polished
-
Heat Treatment / Delivery Condition
Annealed, as ordered
-
Tolerance Standard
ASTM B425 permissible variations
-
Density
8.14 (typical)
g/cm3
Melting Range
1370 - 1400 (typical)
C
Thermal Conductivity at 20 C
11.1 (typical)
W/m.K
Coefficient of Thermal Expansion (20-100 C)
14.0 (typical)
um/m.C
Specific Heat (0-100 C)
440 (typical)
J/kg.K
Electrical Resistivity at 20 C
1.13 (typical)
uOhm.m
Modulus of Elasticity at 20 C
196 (typical)
GPa
Magnetic Properties
Non-magnetic
-
Maximum Service Temperature
540 (typical, continuous)
C
Testing / Inspection Standard
ASTM E8 or ASTM A370 for mechanical testing, ASTM G28 for intergranular corrosion
-
Certification / Inspection Documents
EN 10204 3.1 or 3.2 mill test certificate, NACE MR0175 compliance on request
-
Technical Specifications
Get the key technical specifications for Incoloy 825 Round Bar
Material is ordered to ASTM B425 under UNS N08825, with ASME SB-425 for pressure-retaining components and ASTM B564 for forgings. Dimensional tolerances come from the permissible variations within B425.
Delivery is annealed. The alloy is solid-solution strengthened with no precipitation-hardening response, so cold work is the only way to raise strength.
Titanium stabilisation is the feature that governs fabrication. Titanium at 0.6-1.2% combines with carbon in preference to chromium, so chromium stays dissolved in the matrix where it maintains the passive film. That allows welding without post-weld heat treatment while retaining resistance to intergranular attack, which is a significant practical advantage in fabricated acid plant.
Temperature is the limitation to watch. Service is normally capped near 540 C, and prolonged exposure above that can precipitate phases and sensitise the material, which shows up as reduced corrosion resistance in subsequent wet service rather than as any change in mechanical properties. This is a corrosion alloy, not a high-temperature alloy.
ASTM G28 intergranular corrosion testing is the usual supplementary requirement, and NACE MR0175 / ISO 15156 compliance should be requested where sour service applies.
Machining is demanding, with rapid work hardening typical of solid-solution nickel alloys. Welding uses matching or over-alloyed nickel-base filler.
Chemical Composition for Incoloy 825 Round Bar
Element
Symbol
Min
Max
Unit
Nickel
Ni
38.00
46.00
%
Chromium
Cr
19.50
23.50
%
Molybdenum
Mo
2.50
3.50
%
Copper
Cu
1.50
3.00
%
Iron
Fe
22.0
-
%
Titanium
Ti
0.60
1.20
%
Carbon
C
-
0.05
%
Manganese
Mn
-
1.00
%
Silicon
Si
-
0.50
%
Aluminium
Al
-
0.20
%
Sulfur
S
-
0.03
%
Chemical Composition
View the chemical composition and applicable material limits for Alloy 825 Round Bar
This alloy is unusual in that four separate additions each answer a specific corrosion problem, and understanding which does what explains where the material fits.
Nickel at 38.00-46.00% gives strong resistance to chloride stress corrosion cracking, the mechanism that limits austenitic stainless steels in warm chlorides, and it supports performance in reducing acids.
Molybdenum at 2.50-3.50% strengthens the passive film against localised breakdown, providing resistance to pitting and crevice corrosion in chloride-bearing media.
Copper at 1.50-3.00% is the addition that handles sulphuric and phosphoric acid, exactly the role it plays in 904L stainless. Without it the alloy would perform poorly in those reducing acid conditions.
Titanium at 0.60-1.20% stabilises carbon as titanium carbide, keeping chromium in solution where it maintains the passive film. That is what allows welding without post-weld heat treatment while retaining resistance to intergranular attack.
Chromium at 19.50-23.50% builds the passive layer and covers oxidising conditions.
Carbon is capped at 0.05%, low enough to limit carbide formation even with the titanium stabilisation. Iron at 22% minimum reduces cost as it does in Alloy 800.
Mechanical Properties for Incoloy 825 Round Bar
Mechanical Property
Value
Unit
Tensile Strength, annealed
586
MPa (minimum)
Yield Strength 0.2% Proof, annealed
241
MPa (minimum)
Elongation in 50 mm, annealed
30
% (minimum)
Modulus of Elasticity
196
GPa (typical)
Mechanical Properties
Check the key mechanical properties and performance requirements of Alloy 825 Round Bar
These are ASTM B425 requirements for annealed UNS N08825 bar, all minima. Testing follows ASTM E8 or ASTM A370.
At 586 MPa minimum tensile and 241 MPa minimum proof strength the alloy is somewhat stronger than annealed 316L but is still not a structural material. It is bought for corrosion resistance, and the mechanical requirements simply confirm the material was annealed properly.
The alloy is solid-solution strengthened with no precipitation-hardening response, so no heat treatment will increase strength. Cold work will, at the cost of ductility, and annealing removes the effect.
Ductility is high at 30% minimum elongation, and toughness remains good down to cryogenic temperatures because the structure is austenitic with no ductile-to-brittle transition.
For service applications the more meaningful acceptance criteria are corrosion tests rather than tensile results. ASTM G28 intergranular corrosion testing verifies that the titanium stabilisation is working and the material has not been sensitised, and it is worth making mandatory on the order for fabricated acid plant.
Where sour service applies, NACE MR0175 / ISO 15156 sets hardness limits and environmental restrictions that must be confirmed on the certificate.
Dimension / Sizes for Incoloy 825 Round Bar
Dimension / Size
Value
Unit
Diameter
6 - 250
mm
Standard Length
3 - 6 (random / mill lengths)
m
Custom Length
Cut to length available on request
-
Diameter Tolerance
Per ASTM B425 permissible variations, varies with size and finish
-
Length Tolerance
Per ASTM B425 or as agreed at order
-
Straightness Tolerance
Per ASTM B425 or as agreed at order
-
End Condition
Square cut, chamfered, or as ordered
-
Surface Finish
Hot-rolled and pickled, peeled, turned, centreless ground, polished
-
Available Size Range
6 - 250, larger diameters by forging on enquiry
mm
Cut-to-Length Availability
Available
-
Dimensional Standard
ASTM B425
-
Dimensions & Sizes
Explore available diameters, lengths, and dimensional requirements for Alloy 825 Round Bar
Pricing for Incoloy 825 Round Bar
Round Bar Prices are generally quoted per kilograms or meters tonnes and can fluctuate with the global raw material and market prices. The final price will depend on a variety of factors, including the grade size, diameter, length, surface finish, the quantity and whether the bars are cut to length or in standard lengths.
For smaller quantities, we can also quote per metre or per piece basis once the required dimensions have been confirmed. Container-loads or orders that are larger in size are typically priced per tonne, based upon the specifications required and the supply conditions.
Please provide your desired dimensions, grades, length number, and end for a current quote including the lead time applicable and details for certification.
Pricing
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Why Choose Us
Euro Steel Bars is an international distributor, stockist and exporter of stainless round steel bars that cover carbon, stainless alloy, special grades. We stock a variety of sizes and grades. We guarantee every order with mill test certificates as well as full quality-assurance documentation. Our name speaks to our roots: European-sourced materials that is backed by the certificates and rigor that buyers from Asia as well as the Gulf and Africa are looking for.
Each bar we deliver is accompanied by EN 10204 3.1 mill test certificates as well as complete documentation of quality, so what you receive corresponds to what’s written in the documents. We carry a selection of sizes and grades ready for transport, and cut length upon the request of customers, which results in quicker lead times, whether you’re ordering just a one-off spec or a complete project tonnage.
We operate an actual wholesale business that is that is supported with an internationally-operated supply chain therefore we are able to serve fabricators sourcing one grade the same way in the same way as an EPC contractor who is placing a large order. Our clients include manufacturers, fabricators EPC construction companies, engineers oil and gas projects as well as construction companies. we design our inventory as well as documentation to show what buyers need to bring projects forward.
Our customers trust us across Qatar, Oman, Bahrain, Kuwait, Jordan, Malaysia, Singapore, Thailand, Taiwan, Turkey, Italy and South Africa. If you’re looking to source an Gulf energy project, or a construction project within Southeast Asia, you get the same quality of certified material, the exact documentation, and the exact delivery procedure.
Frequently Asked Questions
What is Incoloy 825 Round Bar?
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What standard does Incoloy 825 Round Bar comply with?
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What are the key mechanical properties of Incoloy 825 Round Bar?
What temperature limit applies to Incoloy 825?
Can Incoloy 825 be welded?
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