| Application and load case | Rod function, drawing revision, load directions and cycling, unsupported length, support and end conditions, environment, and design authority | Geometry and boundary conditions control the buckling, strength, fatigue, alignment, and surface review before grade selection | Approved drawing and buyer design basis; no allowable load or service life is inferred from the steel grade |
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| Grade and controlling standard | Exact designation, standard and edition, product form, permitted alternative, and approval authority | CK45 / 1045 and 42CrMo4 / 4140 labels do not create automatic cross-standard equivalence | Accepted order wording, material identification, and agreed chemistry or property records |
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| Delivery condition | Incoming condition and heat-treatment status required by the approved route | Condition and section affect machining, property evidence, straightening, and later processing | Order condition, process record if specified, and matching test basis |
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| Diameter and tolerance | Incoming, machining, pre-finish, and final diameters; tolerance source; length; quantity; and allowance | Different supply stages and finishing routes require different stock and inspection points | Dimensional report against the controlling drawing, standard, or accepted order |
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| Surface route | Black, peeled, turned, ground, polished, plating-prepared, or finished-plated scope plus downstream responsibility | A process name alone does not define roughness, defect limits, coating, or final size | Surface and dimensional checks at the ordered handoff; coating records only when coating is in scope |
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| Straightness | Required value, reference length or datum, inspection support and method, and stage of measurement | Base-bar, post-heat-treatment, pre-finish, and final-rod straightness are not the same acceptance point | Stage-identified straightness or runout report against the accepted basis |
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| Hardness or mechanical properties | Required property, value source, method, location, orientation, section, lot basis, and test stage | Surface hardness does not automatically establish core properties or finished-rod performance | Actual results and sampling identity when required by the accepted order |
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| Inspection | Dimensions, surface, straightness, chemistry, mechanics, and any NDT or third-party witness scope with methods and acceptance criteria | Inspection scope should match consequence, material route, and supplied processing stage | Named inspection reports and deviation disposition linked to heat, batch, bar, or processing lot as ordered |
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| Packing and marking | Surface protection, bundle or piece identification, marking, handling limits, destination, and buyer labels | Prepared or finished surfaces and traceability can be lost through unsuitable contact or mixed identification | Packing list, marking check, and release record against accepted packing instructions |
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| Documentation | MTC or certificate type, actual results if required, traceability, drawing revision, process records, inspection reports, and shipment documents | A complete document set defines which stage and acceptance basis the supplier is evidencing | Document index reconciled to the accepted order before release |
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