Haynes 230 Round Bar
➡️ Alloy 230 | UNS N06230 | EN 2.4733
➡️ 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:
N06230
Wr. No.:
2.4733
MTC Available:
EN 10204 3.1
Product Description for Haynes 230 Round Bar
Haynes Alloy 230 Round Bar is made from nickel-chromium-tungsten-molybdenum alloy UNS N06230, known in Europe as 2.4733 (NiCr22W14Mo). Bar is supplied to ASTM B572 and ASME SB572 for industrial and pressure use, and to AMS 5891 for aerospace.
The alloy was introduced in the 1980s as an improved high-temperature material. About 14% tungsten and 2% molybdenum give strong solid-solution strengthening, while about 22% chromium gives oxidation resistance. A small lanthanum addition helps the oxide scale stay attached during thermal cycles, which gives long life in parts that heat and cool often.
Its biggest advantage over older alloys is stability. After thousands of hours at high temperature, 230 keeps more of its ductility than alloys such as Hastelloy X, because it forms fewer harmful phases. It also has lower thermal expansion than many heat-resistant alloys, which reduces thermal fatigue.
The alloy resists nitriding and has good resistance to carburising atmospheres. It is approved for ASME Section VIII Division 1 construction at high temperature, which makes it useful in industrial heating and chemical process equipment as well as turbines.
Bar is non-magnetic and supplied turned, peeled or ground, cut to length, with EN 10204 3.1 certification or AMS documentation. It is made into combustor parts, transition ducts, flame holders, furnace rolls, radiant tubes, catalyst grid supports, thermocouple sheaths and high-temperature fasteners.
Its tungsten-rich matrix holds strength well during thousands of hours at heat, and it resists grain growth better than many older alloys. Bar is machined into fasteners, pins, nozzles and fixtures for turbines, furnaces and chemical process heaters. Mill test certificates to EN 10204 3.1 come with each lot.
Common Applications of Haynes 230 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 230 Round Bar
Standard
Country / Region
Grade
UNS
USA
UNS N06230
ASTM / ASME
USA
ASTM B572 / ASME SB572
DIN / EN
Europe
2.4733 (NiCr22W14Mo)
AMS 5891
USA
UNS N06230
Technical Specification for Haynes 230 Round Bar
Specification
Value
Unit
Material
Nickel alloy
-
Grade
230 / UNS N06230 / 2.4733
-
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
8.97
g/cm³
Melting Range
1301–1371
°C
Thermal Conductivity at 20°C
8.9
W/m·K
Coefficient of Thermal Expansion 20–100°C
11.8
µm/m·K
Specific Heat at 20°C
397
J/kg·K
Electrical Resistivity at 20°C
1.25
µΩ·m
Modulus of Elasticity at 20°C
211
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 230 Round Bar
ASTM B572 and ASME SB572 cover UNS N06230 rod, and the alloy has ASME Section VIII Division 1 allowable stresses at high temperature. For aerospace parts, AMS 5891 governs bar and adds controls on grain size, macrostructure and documentation.
The delivery condition is solution annealed at about 1175–1230°C, followed by rapid cooling. This dissolves most carbides and sets the grain size needed for creep strength. A repeat of this anneal restores 230 parts after severe cold forming.
Density is about 8.97 g/cm³, higher than Hastelloy X because of the tungsten content. Thermal expansion is relatively low for a heat-resistant alloy. Physical data listed for 230 come from Haynes publications.
Standard tests to ASTM B572 cover heat chemistry, tension tests and dimensional checks. AMS 5891 may add stress-rupture testing and grain-size limits. Ultrasonic testing, PMI and third-party inspection are common extras for turbine and pressure parts.
Cold-finished 230 bar is held to close diameter limits for fasteners and pins, while larger sizes are hot finished and turned. Standard mill lengths run from about 2 to 6 metres, and cut pieces can be supplied to the length needed. Straightness and end finish should be agreed when the order is placed.
Chemical Composition for Haynes 230 Round Bar
Element
Symbol
Min
Max
Unit
Chromium
Cr
20.0
24.0
%
Tungsten
W
13.0
15.0
%
Molybdenum
Mo
1.0
3.0
%
Iron
Fe
-
3.0
%
Cobalt
Co
-
5.0
%
Manganese
Mn
0.30
1.00
%
Silicon
Si
0.25
0.75
%
Aluminium
Al
0.20
0.50
%
Carbon
C
0.05
0.15
%
Lanthanum
La
0.005
0.050
%
Boron
B
-
0.015
%
Phosphorus
P
-
0.030
%
Sulfur
S
-
0.015
%
Nickel
Ni
Balance
-
%
Chemical Composition
View the chemical composition and applicable material limits for Alloy 230 Round Bar
The composition table follows ASTM B572 for UNS N06230. Chromium at 20.0–24.0% forms the protective oxide scale in oxidising gases.
Tungsten at 13.0–15.0% is the main strengthening element. As a large atom, it stiffens the nickel matrix and slows creep at high temperature. Molybdenum at 1.0–3.0% adds to this effect. Using mostly tungsten rather than molybdenum gives better strength and stability at the very highest temperatures.
Lanthanum at 0.005–0.050% is a reactive element. In very small amounts, it greatly improves the adhesion of the oxide scale so it does not spall during heating and cooling.
Manganese at 0.30–1.00%, silicon at 0.25–0.75% and aluminium at 0.20–0.50% are set with minimums because they support a protective, well-bonded scale.
Carbon at 0.05–0.15% builds grain-boundary carbides that help 230 resist creep. Boron is limited to 0.015%. Iron and cobalt are capped at 3.0% and 5.0%.
Carbon at 0.05–0.15% forms stable carbides that help creep strength. Manganese at 0.30–1.00%, silicon at 0.25–0.75% and aluminium at 0.20–0.50% support the chromia scale. Iron is limited to 3.0% and cobalt to 5.0%, while boron, phosphorus and sulfur are kept low for weld quality.
Mechanical Properties for Haynes 230 Round Bar
Mechanical Property
Value
Unit
Tensile Strength (ASTM B572, annealed)
≥ 758
MPa
Yield Strength 0.2% (ASTM B572)
≥ 310
MPa
Elongation (ASTM B572)
≥ 40
%
Mechanical Properties
Check the key mechanical properties and performance requirements of Alloy 230 Round Bar
ASTM B572 requires solution annealed N06230 bar to reach at least 758 MPa tensile strength, 310 MPa yield strength and 40% elongation at room temperature. AMS 5891 sets its own minimums for aerospace bar.
The alloy is valued for strength at temperature. It keeps better stress-rupture strength than Hastelloy X across much of the 800–1000°C range, and it is used up to about 1150°C in lightly loaded parts. Design values should come from ASME Section II-D for pressure parts or producer stress-rupture data for turbine parts.
Thermal stability is a key mechanical benefit. After long exposure at 760–870°C, 230 keeps much higher room-temperature elongation than older alloys, which lowers the risk of cracking during shutdown or repair.
Cold work raises strength but reduces creep life, so formed parts are usually annealed before service. Test results are reported on the certificate for each heat.
ASTM B572 sets room-temperature minimums of 758 MPa tensile strength, 310 MPa yield strength and 40% elongation for annealed N06230 bar. Its stress-rupture strength stays useful up to about 1000°C. Unlike Alloy X, it keeps good ductility after long ageing in the 650–870°C range, which suits repair welding of used parts.
Dimension / Sizes for Haynes 230 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 230 Round Bar
Pricing for Haynes 230 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 230 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
What is Haynes Alloy 230 Round Bar?
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