Aerospace Materials Specifications (AMS) or Metric Aerospace Materials Specifications (MAM), are published by SAE, International. AMS and MAN designations pertain to materials intended for aerospace applications. The specifications typically include mechanical property requirements significantly more severe than those for non aerospace applications. Processing requirements are common in AMS steels. These specifications are generally used for procurement purposes. Additional phone number for outside US and Canada is 724 766 4970. Example: AMS 5356, AMS 5598B, MAM 5598