Sino Steel supplies ASTM A615/A615M carbon-steel reinforcing bars for concrete projects requiring ASTM bar sizes, specified grades, deformation geometry, tensile and bend testing, heat traceability and export delivery. As an ASTM A615 rebar manufacturer and supplier, we review the exact bar number, grade, unit system, cut length or coil form and MTC requirements before production.
A usable ASTM A615 order combines the standard, grade, ASTM bar number, unit system, delivery form and required inspection. “ASTM A615 Grade 60” is still incomplete if the bar size and delivery condition are missing.
Confirm whether the purchase order is written as A615 in inch-pound units or A615M in SI units.
Use the current standard grade required by the structural design or project specification.
ASTM rebar is ordered by its ASTM number designation rather than being treated as a generic metric Ø-size.
Confirm cut length, coil form where applicable, quantity, tags and required test documentation.
The project should not mix A615 inch-pound dimensions with A615M metric values as if they were exact equivalents.
Select the grade from the design or specification. A higher strength class should not be substituted automatically simply because it has a larger grade number.
Use where the design or purchase specification calls for the Grade 40 route.
Use where the design or purchase specification calls for the Grade 60 route.
Higher-strength route requiring the corresponding grade-specific tensile, elongation and bend acceptance.
Use only where the design and applicable project rules explicitly recognize this strength class.
Older ASTM revisions included Grade 75 [520], while later general A615 routes list Grade 40 [280], 60 [420], 80 [550] and 100 [690]. Confirm the edition required by the contract when an older project specification is involved.
Both standards cover reinforcing steel, but they control different material routes. ASTM A706/A706M uses low-alloy steel with more restrictive chemistry and mechanical controls for applications needing controlled tensile properties or enhanced weldability.
Carbon-steel reinforcing bar route with the grade, deformation, tensile and bend requirements defined by A615/A615M.
Low-alloy reinforcing bar route with tighter chemistry / mechanical controls where controlled tensile behavior or enhanced weldability is required.
Grade 60 A615 and Grade 60 A706 should not be treated as interchangeable without project approval.
If welding is part of the cage, connection or prefabrication route, state it clearly on the RFQ before the material standard is finalized.
ASTM A615 uses the inch-pound system and A615M uses SI values. The values in the two systems are treated independently rather than as exact converted equivalents.
Use ASTM bar numbers, inch-pound dimensions and Grade 40 / 60 / 80 / 100 designations as specified.
Use the SI / metric route and bracketed MPa grade designation where the project is written to A615M.
Avoid writing a bar number in one system, a converted diameter in another and then using a third reference-weight table.
Write “ASTM A615 Grade 60, No. 5 × 40 ft” or a complete A615M metric requirement—not a hybrid.
The ASTM bar number links the nominal dimensions, cross-sectional area and reference weight / mass defined by the standard. It should remain consistent on the PO, bundle identification and inspection records.
Use the standard number designation required by the drawing or bar schedule.
Nominal dimensions are based on the standard-defined equivalent plain-round geometry, not the maximum rib outside diameter.
Bar-number tables connect size to nominal cross-sectional area for design and quantity calculations.
Use the ASTM table for the ordered bar number rather than applying an unrelated metric rebar formula.
A deformed ASTM bar has transverse deformations above the bar body. The nominal size is not established by one caliper reading from rib peak to rib peak.
Check the repeat distance using the applicable ASTM deformation measurement method.
Measure the rib / deformation feature as its own dimensional requirement.
Review the required deformation pattern and gaps instead of treating all ribbed bars as geometrically identical.
Use bar number, nominal dimensions and reference weight together as the size-control basis.
ASTM bar-number reference weight supports size and theoretical quantity calculations. Actual bundle weight supports lifting, loading, shipment reconciliation and the agreed commercial settlement basis.
Use the value defined for the ordered ASTM bar number.
Where a mass check is required, use a measured sample length and suitable weighing equipment.
Reference weight multiplied by the ordered bar length supports quantity planning.
Use measured shipment weight where required by the contract, loading plan or settlement method.
ASTM A615/A615M covers reinforcing bars in cut lengths and coils. The ordered form changes handling, identification and any downstream straightening inspection.
Confirm finished bar length, piece count where required, length tolerance and bundle separation.
Confirm coil identity, downstream handling and whether the buyer will straighten the reinforcement after delivery.
Straightening creates a new finished-geometry condition that the original mill certificate alone does not prove.
Keep grade, bar number and source heat / lot linked through any downstream cutting or straightening route.
The grade name gives the minimum yield-strength class, but release also depends on the applicable tensile, elongation, deformation and bend requirements for the ordered bar number and grade.
| Grade Route | Minimum Yield-Strength Class | What Still Needs Verification |
|---|---|---|
| Grade 40 [280] | 40 ksi [280 MPa] | Tensile requirement, elongation, bend test, deformation geometry and identification. |
| Grade 60 [420] | 60 ksi [420 MPa] | Tensile requirement, elongation, bend test, deformation geometry and identification. |
| Grade 80 [550] | 80 ksi [550 MPa] | Grade-specific tensile / ductility criteria, bend test and bar-size requirements. |
| Grade 100 [690] | 100 ksi [690 MPa] | Project recognition, grade-specific tensile / ductility criteria, bend test and detailing requirements. |
The structural design and project specification decide which grade is acceptable; the supplier should not replace one class with another solely to reduce tonnage or bar count.
A correct bar number or rolling mark does not prove every test result. Final inspection should keep geometry, mass, mechanical performance and identity as separate controls.
Review spacing, height, gap and nominal bar-size route.
Use a controlled sample rather than estimating size from rib appearance.
Review yield, tensile and elongation against the ordered grade and bar size.
Use the grade- and size-specific pin / mandrel and acceptance route required by the standard.
Rolled markings help identify reinforcing steel, but they should be reconciled with the physical bundle, tag and mill test certificate before shipment release.
Check the physical bar marking route required for the ASTM product.
Confirm the bar corresponds to the actual Grade 40 / 60 / 80 / 100 order line.
Bar number, grade, heat / lot and bundle identity should reconcile with the cargo.
The mill document should match the same heat / lot and mechanical results—not merely show an ASTM logo or generic standard name.
The MTC should confirm the delivered material heat / lot, grade and test results. If welding is part of the project, put that requirement on the RFQ so the material standard, chemistry and welding procedure can be reviewed before fabrication.
Match the MTC to the actual bundle identity and rolled material.
Review yield, tensile and elongation results against the grade and bar number delivered.
Review chemistry when the project, purchaser or welding procedure requires it.
Do not assume A615 is equivalent to the A706 low-alloy weldability route. Confirm the project requirement and applicable welding procedure.
Traceability should connect the mill heat or production lot, ASTM A615/A615M route, grade, bar number, mechanical results, cut length or coil identity, bundle tag and shipment documents.
If the original mill product is processed into project lengths or straightened from coil, the finished bundle still needs to point back to the source heat / lot and ASTM grade.
Long rebar bundles can look nearly identical after bundling. Factory packing should keep each ordered identity physically separated and supported for transport.
Use several appropriately spaced restraints along the bundle length.
Long bundles should rest on several supports instead of only at the two ends.
Keep grade, bar number and bundle identity readable through warehouse and loading operations.
Reconcile grade, bar number, length, bundle count and shipment documents before release.
For buyers starting from the thermomechanical reinforcement route before selecting a national standard.
View TMT Rebar →For projects using Chinese GB hot-rolled ribbed reinforcing steel grades.
View HRB Rebar →For projects specifying weldable ribbed reinforcing steel under BS 4449.
View BS 4449 →For factory-welded reinforcement where spacing, bar / wire size, sheet dimensions and weld quality define the product.
View Rebar Mesh →The current general route uses Grade 40 [280], Grade 60 [420], Grade 80 [550] and Grade 100 [690]. For an older project specification, confirm the exact ASTM edition instead of assuming a legacy grade table still applies.
Older ASTM revisions included Grade 75 [520]. Later general A615 editions list Grade 40, 60, 80 and 100, so a legacy Grade 75 requirement should be checked against the contract's specified ASTM edition before quotation.
A615 is a carbon-steel reinforcing-bar route. A706 is a low-alloy route with more restrictive chemistry and mechanical controls for controlled tensile-property applications or enhanced weldability. They should not be substituted by grade number alone.
It is the ASTM bar-number designation linked to the nominal dimensions, area and reference weight / mass in the standard. Use the bar number directly rather than translating the order into an unrelated metric-rebar size system.
The standard covers cut lengths and coils. Availability still depends on the ordered bar number, grade, quantity and mill route, and any decoiled product should be checked after straightening.
If welding is required, state it on the RFQ and review the material chemistry and applicable welding procedure. Do not assume A615 has the same controlled weldability route as ASTM A706.
Send A615 or A615M, grade, ASTM bar number, cut length or coil requirement, quantity, destination and any tensile, bend, welding, MTC, bundle-weight or packing requirements.
Standard route, grade, ASTM bar number, cut length or coil form, quantity and destination are enough to start. Add tensile / bend, welding, MTC, tag, bundle weight or packing requirements where the project controls them.
