| Material Grade | Minimum Temperature | Maximum Temperature |
| Cast Iron | -18ºC | 210ºC |
| Ductile Iron | -20ºC | 343ºC |
| Carbon Steel –Grade A216 –WCB | -29ºC | 425ºC |
| Low Carbon Steel – Grade A352 – LCB | -46ºC | 345ºC |
| Carbon Moly – Grade A217– WC1 (a) | -29ºC | 538ºC |
| 1.30 Cr – 0.5 Mo – Grade A217 – WC6 (b) | -29ºC | 595ºC |
| 2.30 Cr – 1.0 Mo – Grade A217 – WC9 (b) | -29ºC | 595ºC |
| 5 Cr – 0.5 Mo – Grade A217 – C5 (b) | -29ºC | 650ºC |
| 9 Cr – 1.0 Mo – Grade A217 – C12 (b) | -29ºC | 650ºC |
| Stainless Steel – Grade A351 – CF8 (b/c) | -254ºC | 816ºC |
| Stainless Steel – Grade A351 – CF8C (b/d) | -254ºC | 816ºC |
| Stainless Steel – Grade A351 – CF8M (b/c) | -254ºC | 816ºC |
| Inconel | -198ºC | 649ºC |
| Monel | -198ºC | 450ºC |
| Hastelloy B | -198ºC | 371ºC |
| Hastelloy C | -198ºC | 538ºC |
| Nickel | -198ºC | 260ºC |
| Alloy 20 – Grade A351 – CN7M | -46ºC | 150ºC |
Notes as per ASME B16.34 -2009:
a)Not recommended above 470º
b)Flanged end in 150 class rating limit 538º
c) Above 538ºC carbon content must be above 0.04%.
d) Above 538ºC follow heat treatment requirements as per ASME B16.34
