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ASTM E785-81(2024)

Current Reaffirmation

Standard Specification for Crucibles, Ignition, Laboratory, Metal

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1.1 This specification covers two types of metal ignition crucibles, nickel or platinum, complete with covers, for laboratory use.


This specification covers two types of metal ignition crucibles, nickel or platinum, complete with covers, for laboratory use. Two types of crucibles shall be classified according to their capacities: Type I is nickel with capacities of 100 mL and 250 mL and Type II is platinum with capacity of 20 mL. Type I are crucibles and covers which shall be made from 99.4% nickel, spun and hardened and Type II are crucibles and covers which shall be made from 99.9% platinum plus iridium, with the iridium content of not more than 0.4%. The crucibles shall have a standard shape with a flat base to give a firm and stable resting surface. The side wall shall form a sloping and convex surface extending up to the brim. Crucibles shall be of one-piece construction. Covers shall be flat, sunken in the center, and shall have an extension to serve as a handle. The sunken area in the center shall fit inside the crucible.


SDO ASTM: ASTM International
Document Number E785
Publication Date Feb. 1, 2024
Language en - English
Page Count 3
Revision Level 81(2024)
Supercedes
Committee E41.01
Publish Date Document Id Type View
Feb. 1, 2024 E0785-81R24 Reaffirmation
Jan. 1, 2017 E0785-81R17 Reaffirmation
Dec. 1, 2011 E0785-81R11 Reaffirmation
Nov. 1, 2006 E0785-81R06 Reaffirmation
Feb. 27, 1981 E0785-81R01 Reaffirmation
Feb. 27, 1981 E0785-81R96E01 Reaffirmation