HAYNES® 230® alloy for High Strength Furnace Components Tech Brief

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High Strength Furnace Components That Last

Chains and belts that stretch and break, retorts and furnace grates that sag and oxidized away, thermocouple protection systems that droop, lances and nozzles that burn-up – maintenance and replacement costs that can eat into your profits.

It doesn’t have to be that way! Furnace components made using HAYNES® 230® alloy have the strength and environmental resistance to stand up under severe service conditions for the long haul, even up to 2100°F (1149°C). And, when it does come time to straighten it or weld-repair it – go ahead! 230® alloy doesn’t get brittle in service, so you can fix it and put it right back in service when you’d be throwing components made of other materials on the junk pile. For nitriding facilities, combustion gas environments, and many other difficult situations where the stress is high and the “heat is on”, 230® alloy can keep maintenance and downtime costs to a minimum.

Hydrogen Embrittlement – Not susceptible

Nitrogen Absorption in 1200°F (1149°C) Flowing Ammonia After 168 Hours
Alloy
Nitrogen Absorption (mg/cm2)
230® 0.7
600 0.8
601 1.1
X 1.7
800H 4.3
316 6.9
310 7.4
304 9.7

Nominal Composition

Nickel Balance
Cobalt 5 max.
Chromium 22
Molybdenum 2
Tungsten 14
Iron 3 max.
Silicon 0.4
Manganese 0.5
Carbon 0.10
Aluminum 0.3
Boron 0.015 max.
Lanthanum 0.02

Typical Tensile Properties, Plate

Test Temperature 0.2% Yield Strength Ultimate Tensile Strength Elongation 2 in. (51 mm)
°F °C ksi MPa ksi MPa %
RT RT 57 395 125 860 50
1000 540 40 275 103 705 53
1200 650 40 275 98 675 55
1400 760 42 275 88 605 53
1600 870 37 255 63 435 65
1800 980 21 145 35 240 83
2000 1095 11 76 20 140 83
2100 1150 7 47 13 91 106
2200 1205 4 30 9 65 109

Typical Rupture Properties, Plate

Test Temperature Typical Rupture Properties: Stress Required to Produce Rupture in Hours Shown
100 h 1,000 h 10,000 h
°F °C ksi MPa ksi MPa ksi MPa
1200 650 56.0 385 42.5 295 29.0 200
1400 760 27.0 185 20.0 140 14.2 98
1600 870 13.7 95 9.5 66 6.2 43
1800 980 6.0 41 3.0 21 1.6 11
1900 1040 3.5 24 1.8 12 – –
2000 1095 2.1 14 1.0 7 – –
2100 1150 1.2 8 0.6 4 – –

Physical Property British Units Metric Units
Density
0.324 lb/in3
8.97 g/cm3
Electrical Resistivity 49.2 µohm-in 125 µohm-cm
Modulus of Elasticity
30.6 x 106 psi
 211 GPA
Thermal Conductivity
62 Btu-in/ft2-h-°F
 8.9 W/m-°C
Specific Heat 0.095 Btu/lb-°F 397 J/Kg-°C

Environmental Resistance: Flowing Ammonia After 168 Hours

Oxidation in Air – Excellent at 2100°F (1150°C)

Sulfidation – Equal to alloy X

Carburization – Equal to alloy X

Nitriding – Best commercial alloy

Chlorination – Equal to alloy 625

Product Description

HAYNES® 230® alloy is a top-of-the-line high-performance, industrial heat-resistant alloy for applications demanding high strength as well as resistance to environment. It is a substantial upgrade in performance capabilities from common iron-nickel-chromium and nickel-chromium alloys, and displays the best combination of strength, stability, environmental resistance, and fabricability of any commercial nickel-base alloy. HAYNES® 230® alloy can be utilized at temperatures as high as 2100°F (1150°C) for continuous service. Its resistance to oxidation, combustion environments, and nitriding recommends it highly for applications such as nitric acid catalyst grids, high-temperature bellows, industrial furnace fixtures and hardware, strand annealing tubes, thermocouple protection tubes, and many more.