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Nickel Alloy Grade Data Sheet

HAYNES 242

HAYNES 242 is an age-hardenable nickel-molybdenum-chromium alloy combining high strength, relatively low thermal expansion, fatigue resistance, thermal stability and useful oxidation resistance. A long-range ordering reaction during aging substantially increases strength while retaining useful ductility, making the alloy suitable for structural service up to approximately 650-705 °C. Typical applications include gas-turbine seal rings, containment rings, casings, duct segments, high-strength fasteners, springs, rocket nozzles, pumps, extrusion screws and equipment exposed to high-temperature fluorine, hydrogen fluoride or selected fluoride-salt environments.

 

 

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Material Overview

HAYNES 242 material profile

A concise grade introduction for buyers who need to confirm composition, properties, standards, available forms and suitable applications before sending an inquiry.

Engineering profile

HAYNES 242 is an age-hardenable nickel-molybdenum-chromium alloy combining high strength, relatively low thermal expansion, fatigue resistance, thermal stability and useful oxidation resistance. A long-range ordering reaction during aging substantially increases strength while retaining useful ductility, making the alloy suitable for structural service up to approximately 650-705 °C. Typical applications include gas-turbine seal rings, containment rings, casings, duct segments, high-strength fasteners, springs, rocket nozzles, pumps, extrusion screws and equipment exposed to high-temperature fluorine, hydrogen fluoride or selected fluoride-salt environments.

 

 

HAYNES 242

Technical data on this page is for material selection reference. Final acceptance values should be confirmed by the purchase standard, heat treatment condition, product form, size and material test certificate.

Chemical Composition

HAYNES 242 composition range

The following table shows common limiting composition values for Alloy 625 / UNS N06625. Actual product chemistry is reported by heat on the material test certificate.

Element Symbol Nominal Content (%) Role in HAYNES 242
Nickel Ni Balance Forms the stable matrix and supports high-temperature ductility.
Molybdenum Mo 25 Provides solid-solution strength and participates in long-range ordering during aging.
Chromium Cr 8 Supports oxidation resistance and participates in the ordered strengthening structure.
Iron Fe 2.0 max Controlled residual and processing-related element.
Cobalt Co 1.0 max Controlled minor alloying element.
Manganese Mn 0.80 max Supports melting practice and deoxidation control.
Silicon Si 0.80 max Controlled for phase stability, oxidation behavior and weldability.
Aluminum Al 0.50 max Controlled minor element affecting metallurgical behavior.
Carbon C 0.03 max Kept low to limit excessive carbide formation.
Boron B 0.006 max Controlled minor addition affecting grain-boundary behavior.

 

 

Physical Properties

Key physical and thermal data

These values help customers compare density, thermal behavior, magnetic response and conductivity during early material selection.

Property Metric Value Imperial / Notes Condition
Density 9.05 g/cm3 0.327 lb/in3 Room temperature
Melting Range 1290-1375 °C 2350-2510 °F Typical range
Electrical Resistivity Approx. 1.22 µΩ·m Approx. 122 µΩ·cm Room temperature
Thermal Conductivity 11.3 W/m·°C 75.7 Btu·in/ft2·h·°F Room temperature
Specific Heat 386 J/kg·°C 0.092 Btu/lb·°F Room temperature
Dynamic Modulus of Elasticity 229 GPa 33.2 x 103 ksi Room temperature
Dynamic Modulus of Elasticity 193 GPa Approx. 28.0 x 103 ksi Approx. 600 °C
Mean CTE, 25-100 °C 10.8 µm/m·°C 6.0 µin/in·°F Representative manufacturer data
Mean CTE, 25-400 °C 11.9 µm/m·°C 6.7 µin/in·°F Representative manufacturer data
Mean CTE, 25-600 °C 12.3 µm/m·°C 6.8 µin/in·°F Representative manufacturer data
Mean CTE, 25-700 °C 13.0 µm/m·°C 7.2 µin/in·°F Representative manufacturer data
Mean CTE, 25-800 °C 14.0 µm/m·°C 8.0 µin/in·°F Representative manufacturer data

 

 

Mechanical Properties

Room-temperature mechanical properties

Mechanical properties vary with product form, size, processing route and heat treatment. The table below summarizes commonly referenced nominal values for material selection.

Product / Test Condition Tensile Strength Yield Strength, 0.2% Elongation Hardness
Bar and ring, solution annealed and aged, room temperature Approx. 1290 MPa / 187.4 ksi Approx. 845 MPa / 122.4 ksi Approx. 33.7% Typically 35-39 HRC
Plate, solution annealed and aged, room temperature Approx. 1330 MPa / 193 ksi Approx. 868 MPa / 126 ksi Approx. 36% Typically 35-39 HRC
Sheet, solution annealed and aged, room temperature Approx. 1288 MPa / 187 ksi Approx. 827 MPa / 120 ksi Approx. 38% Typically 35-39 HRC
Aged bar and ring, 538 °C Approx. 1080 MPa / 156.3 ksi Approx. 540 MPa / 78.3 ksi Approx. 38.3% Temperature dependent
Aged bar and ring, 649 °C Approx. 1000 MPa / 144.9 ksi Approx. 570 MPa / 82.7 ksi Approx. 33.2% Temperature dependent
Solution-annealed material before aging Product and form dependent Substantially lower than aged condition High formability Typically 95-100 HRB

 

 

For pressure equipment, aerospace parts or project-specific acceptance, use the minimum requirements in the specified ASTM, ASME, AMS, EN or customer drawing rather than nominal values.

Standards & Specifications

Common HAYNES 242 standards by product form

YSN128 can quote Alloy 625 products according to ASTM, ASME, AMS, EN, DIN, ISO or customer drawing requirements. Certificate scope can be matched to the purchase order.

Product Form Common Standards Typical Supply Item Certificate / Inspection
Sheet, Plate and Strip ASTM B434 / ASME SB434 Annealed or fully heat-treated sheet, plate, strip and cut blanks EN 10204 3.1, chemistry, tensile test and heat-treatment record
Billet, Rod and Bar ASTM B573 / ASME SB573, ASTM B472 Billet, round bar, rod and machined bar stock MTC, dimensional inspection and heat-treatment traceability
Seamless Pipe & Tube ASTM B622 / ASME SB622 Seamless pipe, tube and drawing-based tubular products Hydrotest or NDT, dimensional inspection and MTC
Welded Pipe & Tube ASTM B619 / ASME SB619, ASTM B626 / ASME SB626 Welded pipe, tube and fabricated tubular components Weld inspection, NDT, heat treatment and MTC
Forgings and Flanges ASTM B564 / ASME SB564 Rings, discs, blocks, flanges and drawing-based forgings Heat-treatment record, mechanical testing and optional UT
Fittings ASTM B366 / ASME SB366 Elbows, tees, reducers, caps and special fittings PMI, dimensional inspection, NDT and MTC
Bare Welding Rod and Wire AWS A5.14 / ASME SFA-5.14 ERNiMo-12 Matching-composition GTAW and GMAW filler metal Chemical analysis, tensile test and lot traceability
Pressure Equipment ASME Section VIII Division 1, current approved edition Approved plate, sheet, bar, forging, fitting and tubular forms Manufacturer data lists code coverage to approximately 538 °C; verify current allowables and Code Cases.

 

 

Available Product Forms

HAYNES 242 supply range

Review available product forms, size ranges, standards and delivery options for this alloy.

Form Common Size Range Delivery Condition Typical Applications Page Link
Pipe & Tube OD 6-610 mm, wall thickness or schedule to specification Seamless or welded, solution annealed or fully heat treated Fluorine-process equipment, containment systems and high-temperature tubular components View Pipe & Tube
Round Bar Diameter 3-300 mm, larger custom forgings available Hot worked, solution annealed, aged, peeled or ground Fasteners, extrusion screws, shafts, seal rings and machined components View Round Bar
Sheet & Plate Thickness 0.5-100 mm, custom widths and lengths Hot rolled or cold rolled, solution annealed or fully aged Gas-turbine casings, duct segments, containment structures and process equipment View Sheet & Plate
Strip & Foil Thickness 0.02-3 mm, slit widths to specification Cold rolled, annealed, cold worked, aged or controlled temper Springs, seals, retaining components and low-expansion structures View Strip & Foil
Wire Diameter 0.1-12 mm, coil, spool or straight length Cold drawn, solution annealed, cold worked or aged High-strength wire forms, springs, fasteners and retaining components View Wire
Fasteners Standard and custom bolts, nuts, screws, studs and washers Machined or thread rolled, solution annealed and aged Gas turbines, containment structures and high-temperature bolting View Fasteners
Fittings ASME, ASTM and custom drawing dimensions Seamless or welded, solution annealed and aged as specified Fluorine-bearing process systems and high-temperature piping View Fittings
Flanges ASME B16.5, B16.47 or drawing-based dimensions Forged, solution annealed, aged, machined and inspected Pressure equipment, containment systems and process connections View Flanges
Forgings Rings, discs, blocks, shafts and drawing-based components Forged, solution annealed, aged, rough or finish machined Seal rings, containment rings, casings and highly loaded components View Forgings
Welding Wire Diameter 0.76-4.7 mm, spool, reel, coil or straight length Clean bright ERNiMo-12 matching-composition filler metal GTAW and GMAW joining of HAYNES 242 components View Welding Wire

 

 

Material Selection Guide

When to consider HAYNES 242

This guide helps buyers connect service conditions with the typical advantage of Alloy 625. Final selection should consider medium concentration, temperature, pressure, fabrication, availability and budget.

Service Requirement Recommended Alloy Reason for Selection Buyer Note
High strength with relatively low expansion to 705 °C HAYNES 242 Combines age-hardened strength, fatigue resistance, ductility and low thermal expansion. Specify the complete solution-treatment and aging cycle.
Improved strength and lower expansion to about 760 °C HAYNES 244 Developed as a higher-temperature upgrade to HAYNES 242. Compare availability, heat treatment and design-property requirements.
Minimum thermal expansion below approximately 538 °C Alloy 909 Can provide lower expansion in the lower part of the operating range. Review oxidation resistance and environmental protection requirements.
Long-term structural service above 705 °C HAYNES 230 Provides stronger creep and oxidation performance at higher temperatures. Its thermal expansion is higher than that of HAYNES 242.
High-temperature fluorine or fluoride-salt environment HAYNES 242 Provides useful strength with strong resistance in selected fluorine-bearing environments. Confirm oxygen potential, impurities, salt chemistry and test data for the actual process.
General aqueous chemical corrosion Select a dedicated Hastelloy corrosion-resistant grade HAYNES 242 is primarily optimized for strength, expansion control and specialized high-temperature environments. Provide the complete process chemistry, concentration and temperature.

 

 

Why Choose Us

Supply and quality support for HAYNES 242

For ranking traffic, buyers need more than a data sheet. This section gives clear trust signals for procurement, engineering and quality teams.

STASTM / ASME / AMS / EN

Quotation can be matched to project standards and product form specifications.

MTEN10204 3.1 MTC

Heat number, chemistry, mechanical properties and inspection records can be supplied.

QCPMI & Inspection

PMI, UT, dimensional inspection, visual inspection and packing check are available.

CSCustom Size

Cutting, machining allowance, rough machining and drawing-based supply can be arranged.

EPExport Packing

Wooden case, bundle, waterproof protection and international shipping documents.

RFFast Technical Reply

Send grade, size, standard, quantity and destination for a practical quotation route.

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FAQ

HAYNES 242 questions from buyers

Find practical answers about procurement, standards, fabrication and industrial applications.

HAYNES 242 is used for gas-turbine seal and containment rings, casings, duct segments, high-strength fasteners, springs, rocket nozzles, pumps, extrusion screws and selected equipment exposed to hot fluorine, hydrogen fluoride or fluoride salts.

Yes. UNS N10242 is the standardized UNS designation for HAYNES 242 base material and is also used for its matching ERNiMo-12 welding filler chemistry.

The alloy is normally solution annealed and rapidly cooled before aging. A representative aging treatment is approximately 649 °C for 24-48 hours followed by air cooling, but the exact cycle must follow the product and purchase specification.

The alloy provides its strongest combination of tensile and creep properties up to approximately 650-705 °C. Its oxidation resistance can remain useful to about 815 °C, but this higher environmental limit is not a universal load-bearing temperature.

YSN128 can quote plate, sheet, strip, round bar, rod, wire, seamless or welded pipe and tube, forgings, rings, flanges, fittings, fasteners and matching ERNiMo-12 welding wire.

Common standards include ASTM B434 for plate and sheet, ASTM B573 for rod and bar, ASTM B622 for seamless tube, ASTM B619 or B626 for welded tubular products, ASTM B564 for forgings and ASTM B366 for fittings.

Yes. HAYNES 242 can be welded using conventional GTAW and GMAW procedures with matching ERNiMo-12 filler metal. For the best overall mechanical properties, forming and welding are normally followed by solution annealing and aging.

Please send the UNS or alloy grade, product form, dimensions, quantity, ASTM or ASME specification, solution and aging requirements, operating temperature, design load, inspection requirements, certificate type and destination.

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