ASTM B561-23 pdf free download – Standard Specification For Refined Platinum.
This specification covers refined platinum as sponge, cast bar, and wrought forms (Note 1) in two grades as follows:
1.1.1Grade 99.95 (UNS PO4995) – Platinum having a purity of 99.95 %, min, and
1.1.2Grade 99.99 – Platinum having a purity of 99.99 % min.
3. Terminology
3.1 For definitions of the terms pertaining to this standard,reference shall be made to Terminology B542 and B899.
4. Materials and Manufacture
4.1 The metal may be produced by any refining process that yields a product capable of meeting the chemical requirements of this specification. The purchaser, upon request, shall be informed of the refining process used.
4.2 The surfaces of bars and wrought forms shall exhibit quality generally acceptable to the trade.
5. Chemical Composition
5.1 The refined platinum shall conform to the chemical composition prescribed in Table 1. .
6. Sampling
6.1 The value of this material is such that special attention must be paid to sampling procedures. The purchaser and manufacturer shall agree upon the sampling procedures used.
6.2 Lot Size- -Sampling lots shall consist of the following:
6.2.1 Sponge- -A single refining lot, and
6.2.2 Other Forms- A single melt or primary consolidation.
ASTM B561-23 pdf free download – Standard Specification For Refined Platinum
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