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Product Bulletin
Recommended Uses for SECO/WARWICK Atmosphere Generators
Protective Atmosphere
SECO/WARWICK manufactures three types of protective gas atmosphere generators: Endogas® (endothermic), Exogas® (exothermic) and Ammogas® (dissociated ammonia). SECO/WARWICK's refrigerant dryers reduce dew point of exothermic atmospheres from 105°F/40°C to 40°F/4°C.
To learn more about the practical implementation of an atmosphere generator in your facility, follow this link for a background paper from the Furnace Controls & Sensors 2006 Conference that provides basic information: How to achieve the Best Performance and Longest Life from your Gas Generator.
The following chart may be used as a guideline for selecting protective atmosphere for a heat treatment process:
| Metals to be processed | Process | Time Cycle | Appearance | Temperature Range | Protective Atmosphere | ||
| Long | Short | Bright | Clean | °F | see notes below | ||
| Low Carbon Steels | Anneal | x | x | 1200-1350 | Exogas 2, 5 | ||
| Med. & High Carbon Steels | Anneal (no decarb) |
x | x | x | 1200-1450 | Endogas | |
| Alloy Steels, Medium & High Carbon | Anneal (no decarb) |
x | x | x | 1300-1600 | Endogas | |
| High Speed Tool Steels, Molybdenum | Anneal (no decarb) |
x | x | x | 1400-1600 | Endogas | |
| Stainless Steels, Chromium & Nickel Chromium | Anneal | x | x | x | 1800-2100 | Endogas | |
| Copper | Anneal | x | x | x | 400-1200 | Exogas 3 | |
| Various Brasses | Anneal | x | x | x | 800-1350 | Exogas 3 Ammogas | |
| Copper-Nickel Alloys | Anneal | x | x | x | 800-1400 | Exogas 3 | |
| Silicon Copper Alloys | Anneal | x | x | x | 1200-1400 | Exogas 2, 5 | |
| Aluminum Alloys | Anneal & Homogenize | x | x | x | 700-1100 | Exogas 2, 3, 5 | |
| Low Carbon & Silicon Steels | Anneal | x | x 6 | 1400-1500 | Exogas 2, 5 | ||
| Low Carbon & Silicon Steels | Bluing | x | x | 850-950 | Exogas 4, 5 | ||
| Low Carbon Steels | Copper Brazing | x | x | 2050 | Exogas 2, 5 | ||
| Medium, High Carbon & Alloy Steels | Copper Brazing (no decarb) |
x | x | 2050 | Endogas | ||
| High Carbon, High Chromium Steels | Copper Brazing (no decarb) |
x | x | 2050 | Ammogas | ||
| Stainless Steels | Copper Brazing Phosphorous Copper | x | x | 2050 | Ammogas | ||
| Copper or Brass | Brazing or Silver Soldering | x | x | 1200-1600 | Exogas 3 | ||
| Carbon & Alloy Steels | Hardening (no decarb) |
x | x | 1400-2400 | Endogas | ||
| Medium & High Carbon Steels | Hardening (no decarb) |
x | x | 1400-1800 | Endogas | ||
| Alloy Steels, Medium & High Carbon | Hardening (no decarb) |
x | x | 1400-1800 | Endogas | ||
| High Speed Tool Steels, Molybdenum | Hardening (no decarb) |
x | x | 1800-2400 | Endogas | ||
| All classes of Ferrous Metals | Tempering or Drawing | x | x | 400-1200 | Exogas 2, 5 | ||
| Carburizing Steels | Gas Carburizing | x | x | 1400-1800 | Endogas 1 | ||
| Low Carbon Steels | Normalizing | x | x | 1600-1850 | Exogas 2, 5 Endogas | ||
| High Carbon & Alloy Steels | Normalizing (no decarb) |
x | x | 1500-2000 | Endogas | ||
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Maintenance Tips for Atmosphere Generators:
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Thermal Process Team equipment is manufactured by both SECO/WARWICK &
ELTERMA S.A., Poland
USA • Poland • China
©1995-2008 SECO/WARWICK Corporation
The latest design, materials and equipment specifications should be obtained from the company before any reliance is placed on the enclosed since changes may occur due to product improvement.