Heat Resistant

Heat Resistant header
Alloy ASTM Cr% Ni% Max℉ Description
HC A297 
A608 
A743
28.0 4.0 max 2000 (1093℃) Good sulfur and oxidation resistance, minimal mechanical properties.
HD A297 
A608
28.0 5.5 2000 (1093℃) Excellent oxidation and sulfur resistance plus weldability.
HE A297 
A608
28.0 9.5 2000 (1093℃) Higher temperature and sulfur resistant capabilities than HD.
HF A297 
A608
21.0 10.5 1600 
(871℃)
Excellent general corrosion resistance to 1500℉ (816℃) with moderate mechanical properties.
HH A297 
A608
A447
24.0
28.0
 
11.0
14.0
2000 (1093℃) Good strength and oxidation resistance at 1400°-1800℉ (760°-982℃).
HI A297 
A608
28.0 16.0 2000 (1093℃) Improved oxidation resistance compared with HH.
HK A297 
A608
A351
24.0
28.0
18.0
22.0
2100 (1149℃) Better strength / oxidation resistance than HH. Useful range up to 1900℉ (1038℃).
HL A297 
A608
30.0 20.0 1800 (982℃) Improved sulfur resistance compared with HK.
HN A297 
A608
21.0 25.0 2000 (1093℃) Very high strength at high temperatures.
HP A297 
A608
26.0 35.0 2000 (1093℃) Resistant to both oxidizing and carburizing atmospheres at high temperatures.
HT A297 
A608
15.0
19.0
33.0
37.0
2100 (1149℃) Good thermal shock/fatigue resistance. Good carburization resistance.
HU A297 
A608
17.0
21.0
37.0
41.0
2100 (1149℃) Elevated temp. strength increases over HT.
HW A297 
A608
10.0
14.0
58.0
62.0
1800 (982℃) Higher thermal shock / fatigue and carburization resistance with higher nickel.
HX A297 
A608
17.0 66.0 2100 (1149℃) Resistant to hot gas corrosion under cycling conditions without cracking or warping.

The data, information and pictures contained within this website are the property of Duraloy Technologies, Inc. This information may not be distributed, reproduced, downloaded, or copied without the written consent of Duraloy Technologies, Inc. All Rights Reserved.