ASTM

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 American Society for Testing and Materials:

These consist of 16 sections on definitions and classifications of materials of construction and Test methods.

Most of the ASTM Standards are adapted by ASME 

The selection of ASTM Specification depends on the manufacturer, form of material, its mechanical strength and corrosion properties.

The specification number is given an Alphabetical prefix "A" for ferrous and "B" for non-ferrous materials.

ASTM also specifies standard practice for numbering metal and alloys as Unified Numbering System.

Unified Numbering System (UNS) establishes 18 series numbers of metals and alloys. Each UNS number consists of a single letter prefix followed by 5 digits

  • A00001 - A99999 - Aluminum and Aluminum alloys
  • C00001 - C99999 - Copper and Copper Alloys
  • E00001 - E99999 - Rare earth and rare earth like metals and alloys
  • L00001 - L99999 - Low Melting metals and alloys
  • M00001 - M99999 - Miscellaneous non-ferrous metals and alloys
  • N00001 - N99999 - Nickel and Nickel Alloys
  • P00001 - P99999 - Precious Metals and Alloys
  • R00001 - R99999 - Reactive and Refractory metals and alloys
  • Z00001 - Z99999 - Zinc and zinc alloys
  • D00001 - D99999 - Specified mechanical properties of Steel
  • F00001 - F99999 - Cast Iron and Cast Steel
  • G00001 - G99999 - AISI and ASE Carbon and alloy steels
  • H00001 - H99999 - AISI H Steels
  • J00001 - J99999 - Cast Steel
  • K00001 - K99999 - Miscellaneous Steels and Ferrous alloys
  • S00001 - S99999 - Stainless Steel
  • T00001 - T99999 - Tool Steel
  • W00001 - W99999 - Welding Filler Metals and Electrodes


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