Nimonic 75 Round Bar
➡️ Alloy 75 | UNS N06075 | EN 2.4951 | DIN 17752 | BS HR5
➡️ 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:
N06075
Wr. No.:
2.4951 / 2.4630
MTC Available:
EN 10204 3.1
Product Description for Nimonic 75 Round Bar
Nimonic 75 Round Bar is made from an 80/20 nickel-chromium alloy with a small, controlled addition of titanium and carbon. It is designated UNS N06075 and is known in Germany as 2.4951 (NiCr20Ti). In the UK it is covered by the BS HR series of aerospace specifications. Nimonic is a trademark of Special Metals, and the generic name is Alloy 75.
The alloy combines good mechanical properties with very good resistance to oxidation and scaling at high temperature. It is suitable for moderate stress service up to about 1000°C. The titanium and carbon give some dispersion strengthening, but the alloy is not age-hardened like Nimonic 80A.
Nimonic 75 has good ductility and is easy to form, weld and fabricate compared with the precipitation-hardening Nimonic grades. This makes it useful for sheet metal parts and fabricated assemblies, as well as for machined bar parts.
Bars are normally supplied in the solution-treated or annealed condition. They can be hot rolled, forged, extruded, turned or ground. Nimonic 75 stays non-magnetic at all service temperatures, which suits sensor sheaths.
Common applications include gas turbine engineering parts, combustion chamber components, turbine blade inserts, furnace fixtures and parts, heat-treatment equipment, nuclear engineering parts and thermocouple sheaths. Buyers should state the specification, such as the relevant BS HR number or the proprietary specification, together with the delivery condition and any testing required. Because it is not age-hardened, Nimonic 75 is easy to form and weld compared with Nimonic 80A and 90. This makes it a common choice for combustor parts, heat-treatment fixtures and thermocouple sheaths that must be shaped and joined.
Common Applications of Nimonic 75 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 75 Round Bar
Standard
Country / Region
Grade
UNS
USA
UNS N06075
AMS / ASTM
USA
AMS 5754 / ASTM B435
DIN 17742
Europe
EN 2.4951 (NiCr20Ti) / 2.4630
BS
United Kingdom
BS HR 5 / BS HR 161
GB/T 14992
China
GH3030
JIS
Japan
NCF 75
AFNOR
France
NC20T
DIN
Germany
NiCr20Ti
GOST
Russia
ХН78Т / ЭИ435
Technical Specification for Nimonic 75 Round Bar
Specification
Value
Unit
Material
Nickel alloy
-
Grade
Nimonic 75 / UNS N06075 / 2.4951
-
Standard
BS HR 5 / HR 504, DIN 17742 (chemistry)
-
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 / annealed
-
Tolerance Standard
Per ordered specification or as agreed
-
Density
8.37
g/cm³
Melting Range
1340–1380
°C
Thermal Conductivity at 20°C
11.7
W/m·K
Coefficient of Thermal Expansion 20–100°C
11.0
µm/m·K
Specific Heat at 20°C
461
J/kg·K
Electrical Resistivity at 20°C
1.09
µΩ·m
Modulus of Elasticity at 20°C
206
GPa
Magnetic Properties
Essentially 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 Nimonic 75 Round Bar
Nimonic 75 Round Bar is ordered to UK aerospace specifications such as BS HR 5 or HR 504, or to proprietary mill specifications. The chemistry of 2.4951 is given in DIN 17742. There is no widely used ASTM bar standard for this grade, so the specification should be stated clearly on the order.
Bars are hot rolled, forged or extruded and then solution treated or annealed, usually at about 1050°C followed by air cooling. This gives a soft, ductile structure for machining and forming. The alloy is not age-hardened.
The physical data for Nimonic 75 are reference figures for thermal design. Tolerances depend on the ordered specification and finishing route.
Nimonic 75 bars are tested for chemistry, tensile properties and hardness, with grain size added for creep parts. Ultrasonic testing, grain size checks and third-party inspection can be ordered for aerospace and power generation parts.
Nimonic 75 bar is mostly bought for UK and European aerospace and industrial heating work, so the order should name the exact specification, for example BS HR 5 for bar and forging stock. If a US customer asks for an ASTM grade, discuss alternatives such as Alloy 600, because UNS N06075 is not commonly listed in ASTM bar specifications. Grain size can be specified for parts that need creep resistance.
Chemical Composition for Nimonic 75 Round Bar
Element
Symbol
Min
Max
Unit
Carbon
C
0.08
0.15
%
Silicon
Si
-
1.0
%
Manganese
Mn
-
1.0
%
Chromium
Cr
18.0
21.0
%
Titanium
Ti
0.20
0.60
%
Iron
Fe
-
5.0
%
Copper
Cu
-
0.5
%
Nickel
Ni
Balance
-
%
Chemical Composition
View the chemical composition and applicable material limits for Alloy 75 Round Bar
The composition limits shown are the commonly published limits for Nimonic 75 (2.4951 / N06075). Buyers should check the exact limits in the ordered BS HR or proprietary specification.
Chromium at 18–21% forms a protective chromium oxide scale at high temperature. This gives the alloy its very good resistance to oxidation and scaling up to about 1000°C. Nickel forms the balance of the alloy and provides a stable austenitic matrix with good strength and ductility at temperature.
Titanium at 0.2–0.6% and carbon at 0.08–0.15% form fine titanium carbides. These carbides help control grain size and add some strength, especially in creep. Unlike Nimonic 80A, the alloy does not contain enough aluminium and titanium to be age-hardened.
Iron, manganese, silicon and copper are residual elements. Keeping them within limits protects oxidation resistance and hot workability. Carbon at 0.08–0.15% is higher than in most nickel alloys on purpose. It forms fine carbides that add strength at high temperature. Titanium at 0.20–0.60% combines with carbon and nitrogen and adds a small amount of strength, but it is too low to cause age hardening. Iron is limited to 5.0% maximum.
Mechanical Properties for Nimonic 75 Round Bar
Mechanical Property
Value
Unit
Tensile Strength (annealed)
750
MPa
0.2% Proof Strength (annealed)
275
MPa
Elongation (annealed)
42
%
Hardness (annealed)
160–200
HB
Mechanical Properties
Check the key mechanical properties and performance requirements of Alloy 75 Round Bar
The values shown are reference room-temperature properties for annealed or solution-treated Nimonic 75 bar. They are given for guidance only. Mandatory minimum values depend on the ordered specification and should be taken from it.
In the annealed condition the alloy has moderate strength and very high ductility. This makes it easy to bend, form, weld and machine. The alloy is used mainly for its high-temperature oxidation resistance, with useful strength at moderate stresses.
At high temperature, strength falls gradually, and creep becomes the main design factor above about 650°C. For hot parts, designers should use creep and rupture data from the producer or the relevant specification. Results on the mill certificate should be checked against the ordered specification. Nimonic 75 is a solid-solution alloy, so strength comes from its chemistry and grain size rather than ageing. Cold working raises strength, but this extra strength is lost when the part is heated in service above about 700°C. For creep-limited parts, designers should use rupture data at the actual temperature and stress. Hardness is a quick check that the bar has been properly annealed before machining.
Room-temperature elongation is high, so the bar can be bent, drawn and spun into complex hot-section parts.
Dimension / Sizes for Nimonic 75 Round Bar
Dimension / Size
Value
Unit
Available Diameter Range (supply capability)
6–200
mm
Standard Length (random)
1–6
m
Custom / Cut-to-Length
Available on request
-
Diameter Tolerance
Per ordered BS HR or proprietary specification, or as agreed
-
Length Tolerance
Per ordered standard or as agreed (commonly +50 / -0 mm for cut lengths)
-
Straightness Tolerance
Per ordered specification 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 75 Round Bar
Pricing for Nimonic 75 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 Nimonic 75 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
Should I choose Nimonic 75 or Alloy 600?
What maximum temperature can Nimonic 75 handle?
Is Nimonic 75 the same as Alloy 600?
Can Nimonic 75 be used for thermocouple sheaths?
How is Nimonic 75 welded and machined?
Where is Nimonic 75 not suitable?
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