Chelation therapy supposedly removes mercury from the body, which chelation supporters say cures autism â but there's no evidence of a link between mercury exposure and autism.In addition, chelation therapy can be associated with serious side effects, including potentially deadly liver and kidney damage.helation therapy supposedly removes mercury from the body, which chelation supporters say cures autism â but there's no evidence of a link between mercury exposure and autism.
Because carbon steels are not very highly alloyed, it is not surprising that most grades do not exhibit large differences in atmospheric-corrosion rate. Nevertheless, alloying can make changes in the atmospheric-corrosion rate of carbon steel.
Precipitation Hardening Stainless Steels. These are chromium and nickel containing steels that can develop very high tensile strengths. The most common grade in this group is 17-4 PH, also known as Grade 630, with the composition of 17% chromium, 4% nickel, 4% copper and 0.3% niobium. The great advantage of these steels is that they can be supplied in the solution treated condition. In this condition the steel is just machineable.