Hastelloy X Round Bar
➡️ Alloy X | UNS N06002 | EN 2.4665
➡️ 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:
N06002
Wr. No.:
2.4665
MTC Available:
EN 10204 3.1
Product Description for Hastelloy X Round Bar
Hastelloy Alloy X Round Bar is made from nickel-chromium-iron-molybdenum alloy UNS N06002, known in Germany as 2.4665 (NiCr22Fe18Mo). Bar is supplied to ASTM B572 and ASME SB572 for industrial use and to AMS 5754 for aerospace parts.
Alloy X was introduced in the 1950s for jet engines and quickly became a standard hot-section material. It gets its strength from solid-solution hardening by molybdenum and a small tungsten content, rather than from ageing. This means it keeps a stable, ductile structure after welding and does not need a precipitation heat treatment.
With about 22% chromium, it forms a protective chromium oxide scale and resists oxidation in service up to about 1200°C. It also has good resistance to carburising and reducing atmospheres, which is why it is used in petrochemical furnaces as well as turbines.
Fabrication is a strong point. Alloy X can be cold formed, spun, welded and brazed more easily than many heat-resistant grades. Its creep strength is good up to about 900°C, although newer alloys such as 230 and 617 are stronger at the very top of the temperature range.
Bar is non-magnetic and supplied turned, peeled or ground, cut to length, with EN 10204 3.1 certification or AMS-compliant documentation. It is made into combustor liners, transition ducts, afterburner parts, flame holders, turbine fasteners, furnace rolls, muffles and flare tips.
The alloy also serves in industrial furnace hardware, heat-treating fixtures and petrochemical parts that run hot for long periods. It forms easily and welds well, so bar can be turned into pins, bolts and fittings without special handling. Ultrasonic testing and PMI are common extras on aerospace orders.
Common Applications of Hastelloy X 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 X Round Bar
Standard
Country / Region
Grade
ASTM B572
USA
UNS N06002
ASME SB572
USA
UNS N06002
DIN 17744 / DIN 17752
Europe
2.4665 (NiCr22Fe18Mo)
AMS 5754
USA
UNS N06002
GB/T 14992
China
GH3536 (nearest)
Technical Specification for Hastelloy X Round Bar
Specification
Value
Unit
Material
Nickel alloy
-
Grade
X / UNS N06002 / 2.4665
-
Standard
ASTM B572 / ASME SB572
-
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 annealed
-
Tolerance Standard
Per ASTM B572 tolerance tables
-
Density
8.22
g/cm³
Melting Range
1260–1355
°C
Thermal Conductivity at 20°C
9.1
W/m·K
Coefficient of Thermal Expansion 20–100°C
13.9
µm/m·K
Specific Heat at 20°C
486
J/kg·K
Electrical Resistivity at 20°C
1.18
µΩ·m
Modulus of Elasticity at 20°C
205
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 Hastelloy X Round Bar
ASTM B572 and ASME SB572 cover UNS N06002 rod for industrial and pressure-equipment use, and the alloy has ASME Section VIII allowable stresses up to high temperature. For aerospace, bar is ordered to AMS 5754, which adds tighter controls on grain size, macrostructure and documentation.
Mills deliver Alloy X solution annealed at about 1175°C and rapidly cooled. This dissolves most carbides and gives the grain size needed for creep strength and formability. Heavily formed Alloy X parts can be given the same anneal again.
Density is about 8.2 g/cm³. The alloy has moderate thermal expansion and low thermal conductivity, which designers must allow for in parts joined to steel. Table physical values for Alloy X are reference figures from producers.
Standard tests under ASTM B572 are heat chemistry, tension tests and dimensions. AMS 5754 adds elevated-temperature or stress-rupture testing where specified, grain-size checks and full traceability. Ultrasonic testing, PMI and third-party inspection are common extras for turbine parts.
AMS 5754 suits aerospace buyers, while ASTM B572 and ASME SB572 apply in industrial and code use. Each calls for solution annealed bar, with grain size and test limits set by the chosen document.
Chemical Composition for Hastelloy X Round Bar
Element
Symbol
Min
Max
Unit
Chromium
Cr
20.5
23.0
%
Iron
Fe
17.0
20.0
%
Molybdenum
Mo
8.0
10.0
%
Cobalt
Co
0.5
2.5
%
Tungsten
W
0.2
1.0
%
Carbon
C
0.05
0.15
%
Manganese
Mn
-
1.0
%
Silicon
Si
-
1.0
%
Boron
B
-
0.010
%
Phosphorus
P
-
0.04
%
Sulfur
S
-
0.03
%
Nickel
Ni
Balance
-
%
Chemical Composition
View the chemical composition and applicable material limits for Alloy X Round Bar
The composition table follows ASTM B572 for UNS N06002. Chromium at 20.5–23.0% forms the oxide scale that protects the alloy at high temperature and in oxidising gases.
Molybdenum at 8.0–10.0% is the main strengthening element. It stiffens the nickel matrix by solid-solution hardening and adds creep strength. Tungsten at 0.2–1.0% supports this effect.
Iron at 17.0–20.0% is a deliberate part of the design, not a residual. It lowers cost, helps hot workability and gives the alloy its good weldability. Cobalt at 0.5–2.5% adds a small amount of extra strength.
Carbon at 0.05–0.15% is higher than in corrosion alloys on purpose. It forms stable carbides that pin grain boundaries and resist creep at high temperature. Boron up to 0.010% strengthens grain boundaries.
Manganese and silicon are each limited to 1.0% to support scale adhesion without harming ductility. Phosphorus and sulfur are kept low for weld soundness.
Carbon at 0.05–0.15% forms carbides at the grain boundaries, and these help creep strength in service. Boron is capped at 0.010% and silicon and manganese at 1.0% each. Phosphorus and sulfur are kept low to protect hot ductility and weld quality.
Mechanical Properties for Hastelloy X Round Bar
Mechanical Property
Value
Unit
Tensile Strength (ASTM B572, annealed)
≥ 655
MPa
Yield Strength 0.2% (ASTM B572)
≥ 240
MPa
Elongation (ASTM B572)
≥ 35
%
Mechanical Properties
Check the key mechanical properties and performance requirements of Alloy X Round Bar
ASTM B572 requires solution annealed N06002 bar to reach at least 655 MPa tensile strength, 240 MPa yield strength and 35% elongation at room temperature. AMS 5754 sets its own minimums for aerospace bar, so the ordered specification governs acceptance.
Room-temperature strength is only part of the story. Alloy X is chosen for its behaviour between about 650°C and 1000°C, where it keeps useful tensile and creep strength and good ductility. Design data for these temperatures should come from ASME Section II-D for pressure parts or from producer stress-rupture curves for turbine parts.
Long service between about 650°C and 870°C can lead to carbide and sigma formation, which lowers room-temperature ductility. Parts removed from service may need a re-anneal before repair welding.
Cold work raises strength but reduces creep life, so heavily formed parts are usually solution annealed before use. Test results for each heat and lot are shown on the certificate.
At about 870°C Alloy X still keeps useful rupture strength for combustor parts. Long heating in the 650–870°C range can lower ductility through carbide and sigma formation, so aged parts may need a fresh anneal before repair welding.
Dimension / Sizes for Hastelloy X 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 ASTM B572 tolerance tables
-
Length Tolerance
Per ordered standard or as agreed (commonly +50 / -0 mm for cut lengths)
-
Straightness Tolerance
Per ASTM B572 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
-
Diameter Range Covered by Standard
7.94–88.9 (ASTM B572 rod scope, larger diameters supplied to agreed specification)
mm
Dimensions & Sizes
Explore available diameters, lengths, and dimensional requirements for Alloy X Round Bar
Pricing for Hastelloy X 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
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