Wire from alloy ZlSrPdM 375-100-38, GOST 7222-75

The item is identified as wire from gold alloy ZlSrPdM 375-100-38.

What this item is

GOST 7222-75 applied to cold-drawn wire for technical and jewelry purposes and provided for different cross-section shapes and material conditions. Since the standard has been replaced by GOST 7222-2014, when ordering you must specify in writing the applicable edition of the document and the agreed requirements.

Composition and documents

• Grade: ZlSrPdM 375-100-38
• Gold: 37.5–38.0% by mass
• Silver: 9.5–10.5% by mass
• Palladium: 3.5–4.1% by mass
• Copper: balance
• Supply document: GOST 7222-75 (in the manufacturer’s catalog; the validity of the supply document is to be confirmed)

The gold–silver–palladium–copper alloy has a declared gold fineness of 375 and a separate palladium range. The letters and numbers describe the chemical grade, not the product geometry. Copper makes up the remainder to the total mass. For production calculations, the actual batch analysis, material condition, and tolerances of the specific semi-finished product are required.

Applications and technological role

• manufacture of jewelry parts and wire elements after checking diameter and condition;
• forming and assembly according to the process sheet, taking into account the specific cross-section;
• technical work where chemical composition, surface, and tolerances are confirmed by the quality document;

What to agree before ordering

Specify the cross-section shape, diameter or profile dimensions, condition, mass, length, and packaging. Request tolerances, surface requirements, analysis, and batch number. Record in writing the applicable standard: the catalog cites GOST 7222-75, replaced by GOST 7222-2014.

Safety and handling

Protect the surface from contamination by foreign metals. Perform cutting, grinding, and polishing with local exhaust ventilation and eye protection; collect dust and trimmings separately. When heating, use solder and flux only according to proven technology. The safety data sheet and company regulations take precedence.