Heat Resistant

ALLOY ASTM NAME Cr % Ni % MAX F° DESCRIPTION
HC A297
A608
A743
  28 4 max 2000° (1093°C) Good sulfur and oxidation resistance, minimal mechanical properties.
HD A297
A608
  28 5.5 2000° (1093°C) Excellent oxidation and sulfur resistance plus weldability.
HE A297
A608
  28 9.5 2000° (1093°C) Higher temperature and sulfur resistant capabilities than HD.
HF A297
A608
  21 10.5 1600° (871°C) Excellent general corrosion resistance to 1500° F (816°C) with moderate mechanical properties.
HH A297
A608
A447
309 24.0
28.0
11.0
14.0
2000° (1093°C) Good strength and oxidation resistance at 1400°-1800° F (760°-982° C).
HI A297
A608
  28 16 2000° (1093°C) Improved oxidation resistance compared with HH.
HK A297
A608
A351
310 24.0
28.0
18.0
22.0
2100° (1149°C) Better strength / oxidation resistance than HH. Useful range up to 1900° F (1038° C).
HL A297
A608
  30 20 1800° (982°C) Improved sulfur resistance compared with HK.
HN A297
A608
  21 25 2000° (1093°C) Very high strength at high temperatures.
HP A297
A608
  26 35 2000° (1093°C) Resistant to both oxidizing and carburizing atmospheres at high temperatures.
HT A297
A608
330 15.0
19.0
33.0
37.0
2100° (1149°C) Good thermal shock / fatigue resistance. Good carburization resistance.
HU A297
A608
  17.0
21,0
37.0
41.0
2100° (1149°C) Elevated temp. strength increases over HT.
HW A297
A608
  10.0
14.0
58.0
62.0
1800° (982°C) Higher thermal shock / fatigue and carburization resistance with higher nickel.
HX A297
A608
  17 66 2100° (1149°C) Resistant to hot gas corrosion under cycling conditions without cracking or warping.

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