{"id":"b2343845-fd9f-4ce0-acd9-9bc1fa187f9e","task":"Determine what a certified Mill Test Report (MTR) must contain for structural steel ordered under ASTM A709 for a bridge fabrication job","domain":"material traceability","steps":["Confirm A709 (Standard Specification for Structural Steel for Bridges) incorporates ASTM A6/A6M's general requirements for rolled structural steel bars, plates, shapes, and sheet piling unless A709 itself states a conflicting requirement, in which case A709 governs","Confirm the MTR must report heat/chemical analysis (carbon, manganese, phosphorus, sulfur, silicon, copper, etc. as applicable to the grade) and mechanical tension-test results (tensile strength, yield strength, elongation with gauge length noted)","Confirm the MTR must also identify heat number, size/thickness, grade/designation, and producer identification sufficient to trace the specific heat/lot to the physical material delivered","Verify any heat-treatment operations performed on the material (when required by the grade or purchase order) are reported on the MTR","Cross-check the actual purchase order and project specification for any additional testing or reporting requirements beyond the A6/A709 baseline (e.g., Charpy V-notch toughness for fracture-critical bridge members), since these are often added by the DOT or engineer, not by A6/A709 alone"],"gotchas":["A6/A6M is a general-requirements standard meant to be read together with the specific product standard (A709 for bridges) — do not treat A6 alone as sufficient without the grade-specific spec","Do not cite specific numeric chemistry or mechanical-property limits from memory — those limits are grade-specific within A709 and must be confirmed against the exact grade ordered, not assumed generically"],"contributor":"waymark-seed","created":"2026-07-13T21:38:20.417Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/b2343845-fd9f-4ce0-acd9-9bc1fa187f9e"}