DX51D+Z · Z100–Z275 · 0.3–3 mm · width 1 000–1 500 · GOST 14918
Galvanized coil
Hot-dip galvanized coil DX51D+Z with zinc weight Z100–Z275, 0.3–3 mm thick, for profiled sheeting, ventilation and profiles
PPGI · PPGL · RAL · 0.3–1.2 mm · width 1 000–1 250 · GOST 34180
Colour-coated coil
Prepainted coil PPGI and PPGL on a galvanized or aluminium-zinc base, polyester and PVDF, RAL colours, 0.3–1.2 mm
GOST 34180-2017GOST 14918-2020GB/T 12754-2019EN 10169:2010+A1:2012EN 10346:2015ASTM A755/A755MDX51D+ZDX51D+AZTDC51D+ZTS250GD+ZS250GD+ZS350GD+Z
Parameters
| Parameters | |
|---|---|
| Thickness with coating | 0.3–1.2 mm |
| Width | 1 000–1 250 mm; common 1 000, 1 200, 1 250 |
| Base | DX51D+Z (Z100–Z275) or DX51D+AZ (AZ150) |
| Coating type | PE, SMP, HDP, PVDF |
| Coating thickness | top side 20–25 µm, reverse side 5–10 µm |
| Colour | per RAL catalogue; matte or glossy finish to specification |
| Coil inside diameter | 508 or 610 mm |
Sizes and weight
| t, mm | Weight, kg/m² | Sheet 1 500×6 000, kg |
|---|---|---|
| 0.3 | 2.36 | 21.2 |
| 0.35 | 2.75 | 24.7 |
| 0.4 | 3.14 | 28.3 |
| 0.45 | 3.53 | 31.8 |
| 0.5 | 3.93 | 35.3 |
| 0.6 | 4.71 | 42.4 |
| 0.7 | 5.49 | 49.5 |
| 0.8 | 6.28 | 56.5 |
| 1 | 7.85 | 70.6 |
| 1.2 | 9.42 | 84.8 |
Theoretical weight at steel density 7.85 g/cm³. Actual batch weight is by scale and mill certificate.
Description
Colour-coated coil is galvanized (PPGI) or aluminium-zinc coated (PPGL) strip painted on a continuous line: the surface is degreased, a conversion layer is applied, then primer and top coat, each layer cured in an oven. The face side carries 20–25 µm, the reverse 5–10 µm of backing paint or a full two-sided coating to specification. The colour is specified from the RAL catalogue; for roofing and cladding the common shades are RAL 3005, 5005, 6005, 8017 and 9003.
The coatings differ in resistance to ultraviolet and corrosion. Polyester (PE) is the base coating for roofing and fencing; silicone-modified polyester (SMP) and high-durability polyester (HDP) hold colour and gloss longer; fluoropolymer-based PVDF is used on facades where the requirements for colour and gloss retention are higher. The PPGI base is DX51D+Z with zinc class Z100–Z275 to GOST 14918 and EN 10346; the PPGL base is DX51D+AZ with aluminium-zinc AZ150. Mills in China paint to GB/T 12754, where the base grades are designated TDC51D+Z and TS250GD+Z; GOST 34180 and EN 10169 list the same groups by intended use and yield strength.
Inspection at the mill before shipment: total thickness with a micrometer at the edges and in the middle of the width, polymer layer thickness with a magnetic coating gauge, colour compared with the RAL reference sample in daylight, uniformity of shade and gloss along the wrap, absence of runs, skips, blisters and scratches under the protective film; adhesion by the mill’s bend and cross-cut test results in the certificate. The mill test certificate (MTC) is checked against the heat number on the tag: base grade and zinc class, coating type and thickness, colour, mechanical properties. Marking, the protective film, the wrapping and the strapping are checked.
Applications
- roof and wall profiled sheeting
- metal roof tiles and standing-seam roofing
- sandwich panels and facade cassettes
- fences, enclosures, gates
- rainwater systems and roofing trim
- housings for household appliances and retail equipment
Packing and shipment
The surface is covered with protective film to specification; the coil is wrapped in moisture-proof paper and steel sheet, the end faces are closed with rings, strapped with steel band; mill tag with heat number, base grade, zinc class, coating type, RAL colour, thickness, width and weight.
Grade equivalents
| GOST | GB (China) | ASTM | EN | Note |
|---|---|---|---|---|
| St3sp | Q235B | A1011 CS Type B / A36 | S235JR | Correspondence by mechanical properties; the chemical composition and impact toughness requirements differ between the standards — check against the MTC. |
| 09G2S | Q355B (Q345B) | A572 Grade 50 | S355JR | Nearest analogue: yield strength is comparable, but 09G2S carries more manganese and silicon alloying. |
| 08ps | DC01 / SPCC | A1008 CS Type B | DC01 | Cold-rolled low-carbon steel for general use; deep drawing calls for DC03–DC04 or 08Yu. |
| 08ps ZN (GOST 14918) | DX51D+Z | A653 CS Type B | DX51D+Z | Galvanized base for bending and roll forming; the zinc class is specified separately (Z100–Z275). |
| 250 / 350 (GOST 14918) | S250GD+Z / S350GD+Z | A653 SS Grade 37 / 50 | S250GD+Z / S350GD+Z | Structural galvanized grades with a specified yield strength; ASTM SS is the nearest analogue by strength. |
| 08Kh18N10 | 06Cr19Ni10 | 304 | 1.4301 | Austenitic chromium-nickel steel; the GOST grade allows a higher carbon content than 304L. |
| 03Kh17N14M3 | 022Cr17Ni12Mo2 | 316L | 1.4404 | Molybdenum-bearing low-carbon austenitic steel; close correspondence. |
| 12Kh17G9AN4 | 12Cr17Mn6Ni5N | 201 | 1.4372 | Nearest analogue: chromium-manganese steel with nitrogen, nickel partly replaced by manganese; corrosion resistance is lower than that of 304. |
Equivalents are the closest match, not identical: chemistry and tolerances differ between standards. The exact grade and standard are written into the contract.
Related items
St3sp · Q235B · DC01 · 0.5–6 mm · width 20–630 · GOST 6009
Slit strip
Strip slit lengthwise from coil, 20–630 mm wide and 0.5–6 mm thick, for electric-welded tube, profiles and banding
DC01 · 08ps · SPCC · 0.4–3 mm · width 1 000–1 500 · GOST 19904
Cold-rolled coil
Cold-rolled annealed coil in DC01, 08ps and SPCC, 0.4–3 mm thick, for pressing, painting and galvanizing
Buyer questions
How to read a mill test certificate (MTC) for coil
Four blocks in the certificate must agree: the heat number and coil number with the tag on the coil; the grade and standard with the specification; the chemical composition with the limits of the standard for that grade; the mechanical properties (yield strength, tensile strength, elongation) with the values required by the standard. For galvanized coil the zinc coating weight is added, for colour-coated coil the type and thickness of the paint layer. The bureau checks the MTC against the heat at the mill before shipment and hands over the original with the batch.
How hot-rolled coil differs from cold-rolled
Hot-rolled coil is rolled above the recrystallisation temperature: thickness from 1.5 mm, surface with mill scale, wider thickness tolerance. Cold-rolled coil is made from hot-rolled by pickling and cold reduction followed by annealing: thickness from 0.3 mm, smooth surface, tighter tolerance, and the steel is more ductile after annealing. Welded tube, profiles and structures take hot-rolled; pressing, body panels, galvanizing and painting take cold-rolled.
How coil tonnage is calculated
The theoretical weight of one square metre is 7.85 kg per millimetre of thickness; the coil weight is the strip area multiplied by that figure. Shipment and payment go by the actual weight from weighing, recorded in the certificate and on the tag; the difference from the theoretical weight comes from the thickness tolerance. The specification states tonnes, not the number of coils, and separately the maximum weight of one coil and the inside diameter to suit your decoiler.
What the bureau inspector checks at the mill before shipment
Thickness with a micrometer on the outer wrap at several points across the width and on the coil end face; width with a tape; telescoping and tightness of winding; condition of the edge and surface; the heat number on the tag against the MTC; for galvanized coil the uniformity of the coating and absence of bare spots, for stainless coil the grade with a positive material identification (PMI) analyser; packing and strapping. The result is an inspection report with photographs. Rejects recorded in the report are replaced; the replacement is supplied by the mill under its contract with the bureau.
How the batch is sized
The batch is sized to your volume — send your specification: grade and standard, thickness with tolerance, width, surface condition, for coated coil the zinc class and polymer type with the RAL colour, plus the inside diameter and maximum weight of a coil. Mills roll coil to order by width and thickness, so the more precise the specification, the fewer approvals are needed. The bureau selects a mill for that specification and returns confirmed delivery terms.
Price request
Send your specification and we will quote your batch
Steel pricing depends on grade, size, tonnage and delivery terms on the day of contract. A number on the page would be wrong by the time you read it.
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