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.
Alloy 17-4 PH is a precipitation hardening martensitic stainless steel with Cu and Nb/Cb additions. The grade combines high strength, hardness (up to 572Â°F / 300Â°C), and corrosion resistance. Mechanical properties can be optimized with heat treatment. Very high yield strength up to 1100-1300 MPa (160-190 ksi) can be achieved.