GB7323-94

GB 7323-94 — FINAL CERTIFIED VERSION

EXECUTIVE SUMMARY

The query "GB7323-94" is ambiguous: two independent AI drafts identified two entirely different standards. Official authority (std.samr.gov.cn) confirms GB 7323-1994 is WITHDRAWN (废止) — no current replacement is registered under this number. Draft A read it as 加工黄铜 (Wrought brass); Draft B read it as 极压锂基润滑脂 (Extreme-pressure lithium base grease). Procurement implication: do NOT cite GB 7323-94 in any contract — confirm the intended product category with the buyer before sourcing.

APPLICABLE CHINESE STANDARDS

⚠️ CRITICAL: The two drafts describe DIFFERENT products. The standard number alone cannot resolve which product the buyer intends. No numeric comparison is defensible until the product category is confirmed.

STANDARD TIER CLASSIFICATION

⚠️ TIER MISMATCH FLAG (Draft A): GB 7323-1994 covers composition + form only; EN 12163/12164/12166/12167 and ASTM B16/B16M are full product standards (composition + mechanical + dimensional). Comparison is partial — mechanical properties sit in GB/T 4423 / GB/T 2059.

SCOPE BREAKDOWN

Sub-category 1 — Wrought brass (Draft A reading)

Chinese standard: GB 7323-1994: 加工黄铜 化学成分和产品形状 (WITHDRAWN)

International equivalent: EN 12164:2016 (Free-machining rod); ASTM B16/B16M-19 ⚠️ verify current edition

Equivalence: NEQ (no current CN counterpart under this number)

Standard tier match: ⚠️ Tier mismatch — CN composition-only vs INT full product standard

Parameter comparison: Cannot be tabulated — GB 7323-1994 is withdrawn and no verified numeric values were sourced by either draft. Verify: GB/T 5231-2012 §composition tables; GB/T 4423-2020 §mechanical.

Sub-category 2 — EP lithium base grease (Draft B reading)

Chinese standard: GB 7323-1994: 极压锂基润滑脂 (WITHDRAWN)

International equivalent: ISO 6743-9 (L-XBCHB); DIN 51825 (KP2N-30); ASTM D4950 (GC-LB)

Equivalence: NEQ (withdrawn)

Standard tier match: Both TIER 1 — valid comparison in principle

Parameter comparison: No numeric values were verified by either draft. Draft B listed candidate parameters (worked penetration, dropping point, four-ball P_D, copper corrosion) but supplied no confirmed clause-referenced values. Verify: GB/T 7323-2008 §requirements (if this is the successor).

KEY DIFFERENCES SUMMARY

• Product identity — Drafts A and B describe different products. Deviation: total. Mutual Recognition: 不可互认 (Not mutually recognised). Impact: HIGH.
• Standard status — Both agree GB 7323-1994 is withdrawn; official authority confirms. Impact: HIGH.
• Numeric values — Neither draft produced verified clause-referenced numbers. Impact: HIGH — no comparison possible.

REGULATORY LINKAGE TABLE (法规联动)

AUDIT FLAG RESOLUTION

• 🔴 CRITICAL CORRECTION: GB 7323-1994 is WITHDRAWN (废止) per official authority. Any procurement document citing it must be revised.
• ⚠️ UNRESOLVED: Product category (brass vs grease) — cannot be resolved from the number alone. Verify with buyer.
• ⚠️ UNRESOLVED: All numeric parameters — no verified clause-referenced values from either draft.
• ✅ FALSE POSITIVE (domain flag): GB/T 4423-2020 — confirmed CURRENT; no supersession note added.

PROCUREMENT VERDICT

• Do not cite GB 7323-94 in any purchase order or specification.
• Confirm with the buyer whether the product is wrought brass or EP lithium grease.
• If brass: specify GB/T 5231-2012 + GB/T 4423-2020 (or GB/T 2059-2017 for strip).
• If grease: specify GB/T 7323-2008 [Verify: current edition] or the applicable ISO 6743-9 grade.
• Obtain the official standard text before finalising any technical annex.
• Engage a Registered Supervision Engineer (注册监理工程师) for on-site verification.

REFERENCE DOCUMENT CHECKLIST (配套调阅清单)

• GB/T 5231-2012 §composition tables — grade chemistry (if brass)
• GB/T 4423-2020 §mechanical — rod properties (if brass)
• GB/T 7323-2008 §requirements — grease parameters (if grease) [Verify: current edition]
• std.samr.gov.cn — confirm current status of all cited numbers

FIELD INSPECTION CHECKLIST

• Confirm product identity (brass vs grease) against the actual goods.
• Verify grade designation matches the current standard cited in the PO.
• Check mill/test certificates reference a current standard number.
• Confirm chemical composition against GB/T 5231-2012 (brass) or grease test report (grease).
• Verify dimensional/mechanical properties against the applicable product standard.

CONFIDENCE RATING

🔴 LOW — Product identity disputed between two drafts; standard confirmed WITHDRAWN; no verified numeric values. Consult a specialist before procurement.

Technical comparison report — CN Quality Check Standards Tool. This report is NOT a substitute for official standard texts or on-site engineering verification. For physical compliance inspection in China: contact Yang Jia, Registered Supervision Engineer (注册监理工程师).