Steel Grade and Coil Quality for Curved Rebar Stirrup Production

Time：2026-11-04Views：2

Haihui CNC rebar stirrup bending equipment

Diameter is only one selection input

Two bars with the same nominal diameter can behave differently during straightening and bending. Steel grade, mechanical properties, rib pattern and incoming condition all matter. When enquiring about a curved rebar stirrup bending machine, provide the material specification rather than describing the job only as a diameter range.

Document the incoming material

Tell the supplier whether the stock arrives as coils or straight lengths. For coils, include coil weight, internal and external dimensions and the intended pay-off arrangement. Note visible rust, contamination, tangling or irregular winding. These conditions can interrupt feeding and complicate an otherwise suitable forming process.

Check tooling and springback during a trial

Bending resistance and springback depend on material and the forming arrangement. Use the specified tooling and an agreed representative sample to establish settings. Inspect the finished part after it is released, because the unloaded shape is what matters for fit. Changes of material batch may justify a fresh first-piece check.

Keep production records useful

Record the material batch, drawing revision, tooling reference and approved setup alongside the measured sample. If a later part drifts, this record makes comparison easier. Ask Haihui to confirm material compatibility and the proposed forming route in writing; a model name alone does not establish performance on every steel grade or curved profile.