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Some people think they can tell if a part broke due to hydrogen embrittlement by looking at it. This is not correct. The timing of the crack is only one of the key factors that needs to be documented if hydrogen embrittlement is suspected.
Wisconsin Oven Corp. shipped six propane-gas-fired, enhanced-duty walk-in ovens to a material-testing laboratory. The batch ovens, which will be used for hydrogen embrittlement relief of various parts, have a maximum operating temperature of 500°F and work-chamber dimensions of 8 feet wide x 4 feet long x 4 feet high. They were designed with the capacity to heat 1,020 pounds of steel and 220 pounds of a load cart from 70°F to 480°F within 60 minutes when loaded.
Hydrogen embrittlement of fasteners is a result of electrochemical surface treatments whereby hydrogen (in atomic form) enters the lattice of the steel and causes microcracks in the structure, followed by mechanical failure.
