Nimonic 75 (N06075)

What is Nimonic 75 and its applications?

Nimonic 75 (UNS N06075) is a nickel-chromium alloy with controlled titanium and carbon additions. It is primarily used in sheet applications requiring oxidation resistance and moderate strength at elevated temperature.

Gas-turbine engineering: Sheet components in thermal environments.
Industrial furnaces: Components requiring oxidation and scaling resistance.
Heat-treatment equipment: Fabricated parts with moderate strength requirements.

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Engineering Application & Selection Guide

Its chemistry and heat-treated condition support thermal-service performance. The published properties are tied to the stock form and thermal treatment. Moderate-strength, oxidation-resistant sheet service is a different requirement from highly loaded, age-hardened bolting.

Nimonic 75 hex bolts — For burner enclosures, review the actual mechanical load and metal temperature.
Nimonic 75 threaded studs — For thermal fixtures, identify the stock condition and effects of repeated heating.
Nimonic 75 custom fasteners — For fabricated ducting, show sheet thickness, bearing area and differential thermal movement.

Compare Nimonic 75 and 80A where higher strength is required. A sheet-material application does not qualify a highly loaded bolt; the proposed stock form and finished-part condition need their own acceptance basis.

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Nimonic 75 Composition

Selected composition limits · wt.%

ElementWeight %

Ni: Balance
Cr: 18–21%
Ti: 0.2–0.6%
C: 0.08–0.15%

ASTM / ASME specifications by product form

Finished-product requirements

Specify the finished-fastener mechanical requirements, condition and inspection separately from the starting-stock specification.

Nimonic 75 hex bolt requirements ↗

Fasteners · dimensional references

Product	Reference
Hex bolts	ISO 4014 / ISO 4017 · ASME B18.2.1
Threaded studs	DIN 976-1 · ASME B18.31.2
Hex nuts	ISO 4032 · ASME B18.2.2
Socket head screws	ISO 4762 · ASME B18.3
Flat washers	ISO 7089 / ISO 7090 · ASME B18.21.1
Custom fasteners	Customer drawing

Raw-material specifications

Product form / scope	Reference
Rod, bar & forging stock	BS HR 5 · DIN 17752 · ISO 9723 / 9725
Wire	BS HR 504 · ISO 9724
Plate, sheet & strip	BS HR 203 · DIN 17750 · ISO 6208
Pipe & tube	BS HR 403 · DIN 17751 · ISO 6207

Dimensions do not define material or finished-part compliance. Specify the grade, condition and applicable requirements.

How to specify round bar, plate, wire and strip ↗

Nimonic 75 Physical Properties

Dynamic Young’s modulus: 20°C, fully heat-treated cylindrical specimens tested in flexural vibration. Thermal conductivity: 20°C. Producer reference values.

Property	Value	Unit
Density	8.37	g/cm³
Dynamic Young’s modulus	221	GPa
Thermal conductivity	11.7	W/(m·K)

Temperature curves and values

Nimonic 75 Tensile strength, 0.2% proof stress versus temperature; Bar · 1050°C for 30–60 min, air cooled; MPa and degrees Celsius — Tensile and yield strength
Bar · 1050°C for 30–60 min, air cooled

Nimonic 75 Elongation, Reduction of area versus temperature; Bar · 1050°C for 30–60 min, air cooled; percent and degrees Celsius — Elongation and reduction of area
Bar · 1050°C for 30–60 min, air cooled

Nimonic 75 Tensile strength, 0.2% proof stress versus temperature; Sheet · 1050°C for 5–10 min, air cooled; MPa and degrees Celsius — Tensile and yield strength
Sheet · 1050°C for 5–10 min, air cooled

Nimonic 75 Elongation versus temperature; Sheet · 1050°C for 5–10 min, air cooled; percent and degrees Celsius — Elongation vs temperature
Sheet · 1050°C for 5–10 min, air cooled

Procurement and application guide

Specify the material and final condition

Specify product form and heat treatment before setting strength requirements.

Material forms in the technical reference: Round bar · Wire · Sheet · Strip · Plate · Tube · Forging stock · Extruded sections.

Define the finished-part acceptance

Include the material or bolting specification, required final condition, dimensions and quantity. State the service medium, temperature and loading where known. Agree the required tests, inspection coverage and acceptance criteria for the finished part.

Start with the information you have

Send a drawing or share the product form and dimensions. Identify any undecided requirements for review rather than copying a typical property value into the purchase order.

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