Haynes 263 Round Bar
➡️ Alloy 263 | UNS N07263 | EN 2.4650
➡️ 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:
N07263
Wr. No.:
2.4650
MTC Available:
EN 10204 3.1
Product Description for Haynes 263 Round Bar
Haynes Alloy 263 Round Bar is made from nickel-cobalt-chromium-molybdenum alloy UNS N07263, known in Germany as 2.4650 (NiCo20Cr20MoTi). Bar is supplied to AMS 5886 for aerospace use, and the same chemistry is sold as Nimonic 263 by other producers.
The alloy was originally developed in the UK in the 1960s as C-263 to fill a gap. Designers wanted a material stronger than solid-solution alloys but much easier to weld and form than high-strength age-hardenable grades. Alloy 263 achieved this with a modest level of titanium and aluminium, enough to form strengthening gamma prime but not so much that welds crack.
Strength comes from two sources. Cobalt and molybdenum give solid-solution strengthening, while ageing forms fine gamma prime particles. The result is good tensile and creep strength up to about 850°C with good ductility.
About 20% chromium gives good oxidation resistance at its working temperatures. The alloy handles thermal cycling well, which suits parts that heat and cool in each engine run.
Bar is non-magnetic and supplied solution treated, or treated and aged, turned or ground, cut to length, with AMS-compliant documentation. It is made into turbine casings, rings, combustion chamber parts, exhaust ducts, bolts and fittings in aero engines, industrial gas turbines and power plants.
The alloy was first developed in the United Kingdom as C-263 and is sold under several mill names with the same UNS number. It machines and welds well in the solution-treated state and is then aged to full strength. Buyers use it for sheet-metal structures, rings and bolts that must keep strength for long periods at heat. Ultrasonic testing and PMI are often added on aerospace orders.
Common Applications of Haynes 263 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 263 Round Bar
Standard
Country / Region
Grade
UNS
USA
UNS N07263
ASTM / AMS
USA
ASTM B637 / AMS 5886
DIN 17744 / DIN 17752
Europe
2.4650 (NiCo20Cr20MoTi)
GB
China
GH4163 / GH163
JIS
Japan
NW 7263
AFNOR
France
NCK 20 D
Technical Specification for Haynes 263 Round Bar
Specification
Value
Unit
Material
Nickel alloy
-
Grade
263 / UNS N07263 / 2.4650
-
Standard
AMS 5886
-
Product Form
Round bar / rod
-
Diameter (supply range)
6–250
mm
Length (random)
1–6
m
Manufacturing Process
Hot rolled, forged, extruded or cold drawn
-
Surface Finish
Descaled, pickled, peeled, turned, ground or bright
-
Heat Treatment / Delivery Condition
Solution treated, or solution treated and aged
-
Tolerance Standard
Per AMS 5886 / AMS 2261
-
Density
8.36
g/cm³
Melting Range
1300–1355
°C
Thermal Conductivity at 20°C
11.7
W/m·K
Coefficient of Thermal Expansion 20–100°C
11.1
µm/m·K
Specific Heat at 20°C
461
J/kg·K
Electrical Resistivity at 20°C
1.15
µΩ·m
Modulus of Elasticity at 20°C
221
GPa
Magnetic Properties
Non-magnetic
-
Testing / Inspection
Chemical analysis, tensile, hardness, dimensional, UT and PMI on request
-
Certification
EN 10204 3.1 mill test certificate (3.2 on request)
-
Technical Specifications
Get the key technical specifications for Haynes 263 Round Bar
AMS 5886 is the governing specification for Alloy 263 bar, forgings and rings. The alloy is also covered by other international aerospace specifications. The order should state the specification, delivery condition and whether aged properties must be proven.
Solution treatment is done at about 1150°C with rapid cooling. The standard ageing treatment is about 800°C for 8 hours followed by air cooling. Parts are normally machined and welded in the solution-treated condition and aged afterwards.
Density is about 8.36 g/cm³. Thermal conductivity, expansion and similar table values for 263 are producer figures, not AMS limits.
AMS 5886 requires heat chemistry, tension tests after a test ageing treatment, hardness, grain size and macrostructure checks, with full lot traceability. Ultrasonic testing is common for rotating or critical parts. Buyers should confirm that the mill holds the required aerospace approvals.
Bar is normally shipped solution treated so that it can be machined and welded before ageing. When aged bar is wanted, the order should state it clearly and ask for aged test results on the same lot. Hot-finished bar comes with a machining allowance, and cut lengths are available. Mills should state the heat number, condition and specification on each certificate.
Chemical Composition for Haynes 263 Round Bar
Element
Symbol
Min
Max
Unit
Cobalt
Co
19.0
21.0
%
Chromium
Cr
19.0
21.0
%
Molybdenum
Mo
5.6
6.1
%
Titanium
Ti
1.9
2.4
%
Aluminium
Al
0.30
0.60
%
Titanium + Aluminium
Ti + Al
2.4
2.8
%
Iron
Fe
-
0.7
%
Carbon
C
0.04
0.08
%
Manganese
Mn
-
0.60
%
Silicon
Si
-
0.40
%
Boron
B
-
0.005
%
Copper
Cu
-
0.20
%
Nickel
Ni
Balance
-
%
Chemical Composition
View the chemical composition and applicable material limits for Alloy 263 Round Bar
The composition table follows AMS 5886 for UNS N07263. Titanium at 1.9–2.4% and aluminium at 0.30–0.60% form gamma prime during ageing.
Their combined total is held at 2.4–2.8%. This control is the key to the alloy. It gives enough gamma prime for good strength, but keeps the amount low enough that welds and heat-affected zones do not crack during ageing, a common problem with higher-strength alloys.
Cobalt at 19.0–21.0% raises the temperature at which gamma prime dissolves, and it adds solid-solution strength. Molybdenum at 5.6–6.1% gives further matrix strengthening.
Chromium at 19.0–21.0% provides oxidation resistance. Carbon at 0.04–0.08% forms carbides that support creep strength at grain boundaries. Boron up to 0.005% helps grain-boundary strength.
Iron is limited to 0.7%, and manganese, silicon and copper are controlled as minor elements.
Carbon is held at 0.04–0.08% to form carbides that strengthen grain boundaries. Iron is limited to 0.7%, which is lower than in many nickel alloys. Boron is capped at 0.005% and copper at 0.20%. Manganese and silicon are kept low, and trace elements such as lead and bismuth are tightly controlled because they harm hot ductility.
Mechanical Properties for Haynes 263 Round Bar
Mechanical Property
Value
Unit
Tensile Strength (aged)
1004
MPa
Yield Strength 0.2% (aged)
585
MPa
Elongation (aged)
35
%
Mechanical Properties
Check the key mechanical properties and performance requirements of Alloy 263 Round Bar
The table shows producer reference values for bar after the standard ageing treatment: about 1004 MPa tensile strength, 585 MPa yield strength and 35% elongation. These values are guidance only. Acceptance minimums, hardness limits and test conditions come from AMS 5886.
The alloy keeps useful strength up to about 850°C. Above this, gamma prime starts to dissolve and strength falls, so it is not used for the hottest turbine parts.
Ageing roughly doubles yield strength compared with the solution-treated state. Because ductility stays high, aged parts tolerate thermal cycling and assembly stresses well.
Machining is easiest in the solution-treated condition. Aged material is harder and needs carbide tools and slower speeds. Creep and low cycle fatigue data should come from the producer. Test results after the specified ageing cycle are reported on the certificate.
AMS 5886 sets tensile, yield and elongation limits after a test ageing treatment, along with a hardness range. Reference aged values are about 1004 MPa tensile strength, 585 MPa yield strength and 35% elongation. The alloy keeps useful creep strength up to about 850°C. Solution-treated bar is softer and far easier to form and machine than aged bar, which is why most shaping is done before ageing.
Dimension / Sizes for Haynes 263 Round Bar
Dimension / Size
Value
Unit
Available Diameter Range (supply capability)
6–250
mm
Standard Length (random)
1–6
m
Custom / Cut-to-Length
Available on request
-
Diameter Tolerance
Per AMS 5886 / AMS 2261
-
Length Tolerance
Per ordered standard or as agreed (commonly +50 / -0 mm for cut lengths)
-
Straightness Tolerance
Per AMS 5886 or as agreed
-
End Condition
Saw cut square, chamfered or as ordered
-
Surface Finish
Hot finished, descaled, pickled, peeled, turned, centreless ground or cold drawn bright
-
Dimensions & Sizes
Explore available diameters, lengths, and dimensional requirements for Alloy 263 Round Bar
Pricing for Haynes 263 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
Get current Haynes 263 Round Bar pricing based on size, quantity, grade, finish, and delivery requirements.
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
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