{
  "material_grade": "NP1",
  "standard": "GOST 849-2018 / ISO 6283:2017 equivalent",
  "purity_pct_nickel": 99.93,
  "wire_gauge_mm": 6.0,
  "tensile_strength_mpa": 480,
  "provenance": {"country": "Finland", "smelter": "Harjavalta"},
  "batch_size_m": 7026905,
  "batch_reference": "NP1-HARJ-2026-Q2-ALKN",
  "quality_audit": {"auditor": "SGS Switzerland", "date": "2026-06-20", "verdict": "PASS"},
  "_fetched_at": "2026-09-01T17:11:35Z",
  "_stream": "E",
  "_provenance": {"phase": "F-atomic", "chain_predecessor": "aef1940793d395528529f2eb7fc63ef5d2457f5bbc89ba586d367ecbe0b5c18b"}
}