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Choose up to three materials. Compare their properties, reference conditions and specification requirements side by side.

47 matching materials

Nickel-Iron-Chromium AlloysUNS N09901View material details
Special Stainless & Iron-Base AlloysUNS S66286View material details

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Compare Materials: Nimonic 901, A-286
MaterialNimonic 901N09901A-286S66286

Summary

Material familyNickel-Iron-Chromium AlloysSpecial Stainless & Iron-Base Alloys
Grade / UNSN09901S66286
SummaryAn age-hardenable nickel-iron-chromium alloy used for gas-turbine discs, shafts and rings.An age-hardenable iron-nickel-chromium alloy used for high-temperature bolting.

Performance overview

Material focusAge-hardenable Ni-Fe-CrHigh-temperature strength
Physical reference
Density
8.14 g/cm³
Dynamic Young’s modulus
201 GPa
Specific heat
431 J/(kg·K)
Special Metals · Alloy 901 · SMC-076 · Tables 1, 2, 4; forged-bar curve in Figure 1 ↗
Not documented in this reference
Chemical composition
Chemical composition

Selected nominal composition · wt.%

Ni
42.5
Cr
12.5
Mo
5.75
Ti
2.9
Al
≤0.35
Fe
Balance
Special Metals · Alloy 901 · SMC-076 · Tables 1, 2, 4; forged-bar curve in Figure 1 ↗
Chemical composition

Composition limits · wt.%

Cr
13.5–16
Ni
24–27
Mo
1.0–1.5
Ti
1.90–2.35
V
0.10–0.50
B
0.001–0.010
Al
≤0.35
C
≤0.08
Mn
≤2.0
P
≤0.04
S
≤0.03
Si
≤1.0
Supplied technical reference · Scanned PDF page 7 · printed page 19

Mechanical properties

Reference conditions vary or are incomplete. Read the basis, condition and source for each column; these values do not establish a performance ranking or finished-fastener acceptance values.

Tensile strengthNot documented in this reference≥895 MPa
Catalogue reference minimums
Grade 660 · Class A / B / C reference
Not documented in this reference
Supplied technical reference · Scanned PDF page 7 · printed page 19
0.2% yield strengthNot documented in this reference≥585 MPa
Catalogue reference minimums
Grade 660 · Class A / B / C reference
Not documented in this reference
Supplied technical reference · Scanned PDF page 7 · printed page 19
ElongationNot documented in this reference≥15 %
Catalogue reference minimums
Grade 660 · Class A / B / C reference
Not documented in this reference
Supplied technical reference · Scanned PDF page 7 · printed page 19
Reference conditions
Data basis
Published physical reference
Condition
Fully heat treated (modulus sample)
Sample form
Not documented in this reference
Sample size
Not documented in this reference
Test temperature
20°C for modulus and specific heat
Test method
Not documented in this reference
Test direction
Not documented in this reference
Elongation gauge length
Not documented in this reference
Data basis
Catalogue reference minimums
Condition
Grade 660 · Class A / B / C reference
Sample form
Not documented in this reference
Sample size
Not documented in this reference
Test temperature
Not documented in this reference
Test method
Not documented in this reference
Test direction
Not documented in this reference
Elongation gauge length
A5, as labelled in supplied table

Temperature & corrosion

Evaluate the medium, concentration, impurities, temperature and loading together. A melting point or oxidation reference is not a safe working-temperature limit.

Service conditions to reviewState product form, heat treatment and the required strength.For Grade 660 bolting, state the required class and size.
Temperature-dependent data
  • Strength and ductility vs temperatureVacuum-refined, extruded and forged bar
View material details
Not documented in this reference

Heat treatment

Delivery condition and heat-treatment requirements are agreed for the requested product form and order.

ConditionFully heat treated (modulus sample)Grade 660 · Class A / B / C reference
Reference treatmentForged-bar recommendation in source: 1090°C / 3 h, water quench; 775°C / 4 h, air cool; 705–720°C / 24 h, air cool. This is not a BYBOLT process instruction.Special Metals · Alloy 901 · SMC-076 · Tables 1, 2, 4; forged-bar curve in Figure 1 ↗Not documented in this reference

Reference applications

Application examples provide context for review; suitability depends on the actual service conditions.

Reference applicationsGas-turbine shafts, discs & ringsHigh-temperature bolting · turbine components

Standards & documentation

Confirm the edition, product form and condition. Material specifications do not establish finished-fastener compliance.

Material specifications by form
Sources
Sources
Sources

Documents for your enquiry

Every BYBOLT delivery includes an MTC / EN 10204 3.1 certificate, heat-number traceability and mechanical testing. Threaded products include sampled GO / NO-GO gauging. Test methods and acceptance criteria follow the agreed specification; PMI, third-party inspection and additional records are agreed separately at quotation.

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