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AMS INCONEL® alloy MA 758 Details

INCONEL® alloy MA 758 is an oxide-dispersionstrengthened (ODS) nickel-chromium superalloy, made by mechanical alloying. It is a development of the wellestablished aerospace superalloy, INCONEL alloy MA 754, with its chromium content increased to 30%, to improve its performance in corrosive environments at high temperatures. The alloy’s high-temperature strength is enhanced by the use of yttrium oxide for dispersion strengthening.

In addition to its strength and corrosion resistance at high service temperatures, it is readily fabricated and can be hot formed into a range of shaped components for use in thermal processing applications. INCONEL alloy MA 758 is used in some of the most demanding applications for high-temperature metals and alloys. For example, for furnace skid rails to transport heavy steel billets and slabs, at 1260°C(2300°F) and above, and for the bowl-shaped

components used to spin molten glass, at around 1200°C (2200°F), to produce fiberglass for thermalinsulation.

It is used in a range of thermal processing applications, from furnace components, such as hearth rollers, to jigs, tools, and other fabrications for supporting workpieces through heat-treatment processes. It has been specified for a fuel atomizer application in diesel engines.

AMS INCONEL® alloy MA 758 Standard Download

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INCONEL® alloy MA 758 Application:It is used in a range of thermal processing applications, from furnace components, such as hearth rollers, to jigs, tools, and other fabrications for supporting workpieces through heat-treatment processes. It has been specified for a fuel atomizer applica
Category Type Grade Designations
Grades Superalloys INCONEL® alloy MA 758 USA - AMS ,
Chemical composition(mass fraction)(wt.%)
Elements Min.(≥) Max.(≤) Similar Remarks
C - - 0.05
Cr - - 30.00
Al - - 0.30
Ti - - 0.50
Yttrium oxide (Y2O3) - - 0.60
Fe - - 1.00
Ni - - Bal
Mechanical properties of grade INCONEL® alloy MA 758
Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
525 (≥) 792 (≥) 43 42 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 123
Physical properties of grade INCONEL® alloy MA 758
Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
845 (≥) 124 (≥) 11 11 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 324
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
263 613 879
INCONEL® alloy MA 758 Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
HEV2 UNS USA
Steel for exhaust valves
N07002 AISI USA
Steel for exhaust valves
INCONEL® alloy MA 758 AMS USA
It is used in a range of thermal processing applications, from furnace components, such as hearth rollers, to jigs, tools, and other fabrications for supporting workpieces through heat-treatment processes. It has been specified for a fuel atomizer applica
FERRALIUM alloy 255 Whole Whole
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S32550 UNS USA
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2.4605 DIN Germany
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Alloy 59 ASTM USA
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ALLOY 301 UNS USA
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Nicrofer 3718 So* - Alloy DS* DIN Germany
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X1NiCrMoCuN25-20-7, 1.4529, Alloy 926, UNS N08926 EN European
Steel is used mainly in the chemical, paper, cryogenic, aerospace, and power industries. The main end products are heat exchangers, chemical tanks, pumps, screws, aircraft components, bushings, shafts, water desalination and flue gas desulphurisation equi
303 MA UNS USA
Steel, Corrosion-Resistant, Bars and Forgings 0.14S - 18Cr - 9.5Ni - 0.50Mo - 0.80Al (303MA) Free-Machining; Swaging or Upsetting Solution Heat Treated
303 MA ASTM USA
Steel, Corrosion-Resistant, Bars and Forgings 0.14S - 18Cr - 9.5Ni - 0.50Mo - 0.80Al (303MA) Free-Machining; Swaging or Upsetting Solution Heat Treated
A 959 Type XM-2 SAE USA
Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
A 581 S30345 SAE USA
Free-Machining Stainless Steel Wire and Wire Rods

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