Penn Machine manufactures pressure fittings in SA/A105, SA/A106, SA/234, SA/333, SA/A350 and SA/420 which are galvanized with Zinc and conform to the specifications of ASTM-B633 and ASTM-A153 respectively. The melting point of elemental Zinc is approximately 780 Degrees F [415 C]. Therefore, application of Zinc Coated piping products should be limited to temperatures less than 390 Dergees F [210 C]. Use of Galvanized coated piping products at temperatures above approximately one-half the melting point (Fahrenheit or Celsius) of the galvanized coating is not recommended unless consideration is given to the potential for liquid and solid metal embrittlement, or both.