Materials / A-286

A-286Thermal strength

A precipitation-hardened iron-nickel-chromium alloy for high-strength bolting and elevated-temperature assemblies.

Material specification overviewCompare Materials

Material positioning

A-286 Fasteners

An age-hardenable alloy considered for fasteners requiring useful strength and oxidation resistance at elevated temperature, with heat treatment and mechanical properties defined by the governing specification.

Positioning: Elevated-temperature bolting
Available forms: Bolts, studs, nuts, screws, machined parts and round bar
Documentation: Heat treatment, mechanical testing and material traceability

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Engineering reference

Performance and service profile

Representative information for preliminary review. Final values depend on product form, dimensions, heat treatment and governing specification.

Typical tensile strengthTypically 965 MPa or greater in common precipitation-hardened bar conditions

Typical yield strengthTypically 655 MPa or greater in common precipitation-hardened bar conditions

Reference conditionSolution treated and precipitation hardened

Temperature capabilityDesigned for high-strength elevated-temperature service; final limits depend on fastener grade, stress level and heat-treatment route.

Corrosion characteristicsUseful oxidation and general corrosion resistance, with selection normally driven by thermal strength rather than severe chemical resistance.

Typical heat treatmentSolution treatment followed by precipitation hardening to the specified grade

Typical applications

Power-generation bolting
Gas-turbine hardware
Thermal processing equipment
High-temperature industrial fasteners

Standards support

ASTM A453 Grade 660
AMS 5731 / 5732 / 5737 where applicable
Project-specific fastener specifications

Documentation support

MTC / MTR
Heat-treatment records
Mechanical test report
Hardness verification
Full heat and lot traceability