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

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

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.

30241

30242

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
Test Temperature		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.

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