Bulk hot-rolled strip for tube mills and fabricators
Hot-rolled coil supplies feedstock for welded tube, roll forming and general fabrication. A36, Q235, SS400 and tube-making strip grades are available with oiled surfaces or separately specified preparation; full-width coils and prepared strip have distinct order dimensions.
| Coil series | Thickness (mm) | Thickness (in.) | Width (mm) | Material options | Surface condition |
|---|---|---|---|---|---|
| Main hot-rolled coil series | 1.5–25.0 | 0.0591–0.9843 | 600–2,000 | Q235; A36; SS400 | Oiled |
| Thin hot-rolled catalog series | 1.0–2.5 | 0.0394–0.0984 | 300–2,000 | SPHC; SPHT1/2; structural strip grades | Ordered hot-rolled surface |
These are two separate catalog series. The millimeter ranges are the supply basis; inch values are rounded conversions. Each quotation states the available grade and exact thickness-width combination within the selected series.
Tube forming and fabrication depend on the actual strip dimensions. A gauge reference is paired with a decimal thickness and its tolerance; width identifies the steel entering the line before any edge trimming. The receiving specification also defines whether the edges remain as rolled or require preparation.
Find a nominal strip thickness or width to plan material consumption.
| Thickness (mm) | Width (mm) | Mass (kg/m) | Length per 1,000 kg (m) |
|---|---|---|---|
| 1.5 | 1000 | 11.775 | 84.93 |
| 2 | 1000 | 15.700 | 63.69 |
| 2 | 1250 | 19.625 | 50.96 |
| 3 | 1250 | 29.438 | 33.97 |
| 4 | 1500 | 47.100 | 21.23 |
| 6 | 1500 | 70.650 | 14.15 |
| 8 | 1500 | 94.200 | 10.62 |
| 12 | 2000 | 188.400 | 5.31 |
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Calculated with a steel density of 7,850 kg/m³: mass in kg/m = 7.85 × thickness in mm × width in mm ÷ 1,000. Length per metric tonne = 1,000 ÷ mass in kg/m. The table uses nominal rectangular, uncoated strip dimensions, with no allowance for thickness tolerance, oil, scale or processing loss. It is a material-planning reference, separate from the coil series above.
| Material designation | Specification | Selection detail |
|---|---|---|
| A36 | ASTM A36/A36M | Structural material requirement; processed plate has its own acceptance scope |
| Q235 | GB/T 700 | Carbon structural steel with the ordered grade suffix and delivery requirements |
| SS400 | JIS G 3101 | General structural steel; distinct from commercial forming strip |
| SPHC | JIS G 3131 | Commercial hot-rolled sheet and strip for general forming |
| SPHT1 | JIS G 3132 | Hot-rolled tube-making strip, retaining the SPHT1 designation |
| SPHT2 | JIS G 3132 | Hot-rolled tube-making strip with its own specified mechanical requirements |
| S235JR | EN 10025-2 | Structural grade with JR toughness designation and applicable delivery requirements |
ASTM A1011/A1011M covers designated hot-rolled sheet and strip products; ASTM A1018/A1018M covers designated heavy-thickness coils. A US material request includes the steel type or grade and the applicable specification. These coil designations are separate from an A36 structural material requirement, and a similar grade name does not establish equivalence.
Hot rolling leaves an oxide scale on the strip surface. An oiled hot-rolled coil retains that scale; oiling is a separate treatment. This surface suits feedstock orders whose downstream operation includes the required cleaning or descaling.
Pickling removes mill scale, while the subsequent oil protects the cleaned surface during handling. HRPO identifies that distinct processing condition. We review pickled-and-oiled requests separately from our standard oiled hot-rolled coil lines and itemize the preparation on the quotation.
The downstream process determines the required surface cleanliness. Welding areas need the relevant local preparation; a paint system needs its specified cleaning and surface profile. Neither an oiled designation nor a pickled finish, by itself, establishes that the strip is ready for every paint or welding process.
At a fixed width, thicker strip has more mass per meter and reaches the same coil-weight limit with less usable length. Full-width supply therefore pairs the strip dimensions with the receiving bore, maximum outside diameter and individual weight. Winding direction and the condition of the coil head also affect direct feeding.
Tube-making strip is prepared to the producer’s slit width, forming allowance and weld allowance. Slitting and recoiling are quoted with the specified width tolerance, burr, camber and receiving-coil limits.
Uncoiling, leveling and cutting change the delivery format from a coil to flat pieces. Length, flatness and cut-edge requirements then become part of acceptance. Cut lengths are priced by their finished dimensions and processing scope, separately from a full-coil feedstock line.
Hot-rolled strip is the feedstock for our welded steel tubes. Material grade, strip width and edge preparation affect forming and the weld seam. The finished tube is ordered and accepted to its own product specification; the coil material record remains part of that production trail.
Channels, profiles and fabricated brackets need a grade suited to the bend and forming operation. Thickness, bend geometry and surface preparation work together. A structural designation establishes material requirements; it does not replace the forming details for the particular part.
A coil cut into a structural plate needs the relevant plate specification and processed-product testing, including the applicable ASTM A6/A6M requirements. The coil identity alone does not establish finished-plate acceptance. That testing and delivery scope is defined with the cut-to-length material.
Strip thickness and width are checked at the measuring positions required by the ordered specification, with the applicable tolerances on the dimensional record.
Edge cracks, burrs and winding alignment affect how strip feeds into the next operation. The receiving condition covers edge damage, telescoping and loose wraps. Prepared strip carries the additional width and camber requirements from its processing line.
Surface checks distinguish the ordered mill-scale, oiled or prepared condition and identify handling damage. Scratches, corrosion and surface defects are evaluated against the agreed acceptance requirements for the downstream use.
Grade and heat or batch records stay associated with individual coil identification. Where specified, the material record carries chemistry and mechanical test results for the applicable steel. Coil numbers connect those records with the receiving list.
Our hot-rolled coil quotations identify the material, strip dimensions, surface and weight unit on each line. One metric tonne is 1,000 kg. Actual net steel weight, theoretical strip calculations and gross shipping weight remain distinct quantities; preparation, packing and freight have an explicit price scope.
The grade, strip size and surface preparation determine each supply lot. The quotation states its minimum quantity and dispatch terms. A mixed-size order carries separate material lines and any different production dates, so the shipment plan reflects the coils actually being supplied.
Secure bands and suitable supports keep the coil stable during handling. Edge and eye protection address contact damage at the wound-strip faces and the bore. The packing list records coil identification, strip dimensions, individual net and gross weights and the agreed unloading orientation.
Yes. Identify it as a minimum-thickness requirement and include the required tolerance basis. A nominal thickness permits the variation defined by its specification; the same number stated as a minimum has a different acceptance meaning. We quote the material against the stated basis.
Coil splitting and recoiling are reviewed processing requests. The line needs its bore, maximum outside diameter and maximum individual weight defined together. The quotation states the accepted finished-coil geometry and processing scope; a maximum weight alone is not a complete receiving requirement.
Yes, the inquiry can retain Q345 with its original standard edition and grade suffix. We review the requested material identity before quoting. A later Q355 designation is not substituted automatically; any alternative needs its own agreed material requirements.
The repeat-order line retains the approved specification, grade, strip dimensions and acceptance requirements. A new heat or batch keeps its own coil identity and material records. Any proposed material or delivery-condition change is identified separately before order acceptance.
Send your hot-rolled coil schedule and destination, with the receiving bore, diameter and weight limits. Our quote itemizes material, strip dimensions, surface condition and any slitting or cut-length preparation.