EN
PTUtilizing high-strength G450-G550 base steel, this product is specifically engineered to meet the high load-bearing and long-span requirements of purlin and truss systems. The zinc coating Z120 - Z275, compliant with JIS G 3302/ASTM A653 standards, effectively protects the steel core from corrosion, ensuring durability and longevity for the load-bearing structure.
Zinc coated (Galvanized) steel sheet is coil steel with 2 layers of pure zinc (99%), using continuous hot-dip technology, through NOF furnace temperature to control mechanical properties which are suitable for different applications.
Specification
- GI
- Purlin and grits
- DESCRIPTION
| Specification | Specicfic Document Number | Steel GRADE | Zn% | Al% | Si% | Mg% | YS [N/mm2] [Min] |
TS [N/mm2] [Min] |
E [%] [Min] L0=50mm |
Primary Applications |
|---|---|---|---|---|---|---|---|---|---|---|
| JIS | G 3302 | SGCC | 99% | – | – | – | ≥ 205 | ≥ 270 | ≥30 | HVAC, CAPLE TRAY, ELECTRIC CABINET, PURLIN, ROOFING |
| JIS | G 3302 | SGCD1 | 99% | – | – | – | – | ≥ 270 | ≥32 | Drawing |
| JIS | G 3302 | SGCD2 | 99% | – | – | – | – | ≥ 270 | ≥34 | Deep Drawing |
| JIS | G 3302 | SGCD3 | 99% | – | – | – | – | ≥ 270 | ≥36 | Deep Drawing |
| JIS | G 3302 | SGCH | 99% | – | – | – | – | – | – | Surface rigidity, not intended for bending |
| AS | AS 1397 | G1 | 99% | – | – | – | – | ≥250 | (High)¹ | Bending, basic forming, appliance casings, HVAC ductwork. |
| AS | AS 1397 | G2 | 99% | – | – | – | – | ≥250 | ≥27 | Better formability than G1 (e.g., lock-seam ducting, pressing). |
| AS | AS 1397 | G3 | 99% | – | – | – | – | ≥250 | (Very High)¹ | Deep drawing, complex components. |
| AS | AS 1397 | G250 | 99% | – | – | – | ≥250 | ≥320 | ≥22 | Light structural components, roofing, cladding (good ductility). |
| AS | AS 1397 | G300 | 99% | – | – | – | ≥300 | ≥340 | ≥18 | Structural framing, building structures. |
| AS | AS 1397 | G350 | 99% | – | – | – | ≥350 | ≥420 | ≥14 | Purlins, trusses, moderate-strength structural applications. |
| AS | AS 1397 | G450 | 99% | – | – | – | ≥450 | ≥480 | ≥9 | High-strength C/Z purlins, pre-engineered buildings (PEB). |
| AS | AS 1397 | G500 | 99% | – | – | – | ≥500 | ≥520 | ≥7 | High-strength purlins, steel decking. |
| AS | AS 1397 | G550 | 99% | – | – | – | ≥550 | ≥550 | ≥2 | Highest strength: Steel decking, long-span purlins (requires rigidity, not formability). |
| ASTM | ASTM A653/ A653M | CS | 99% | – | – | – | 205 – 380 | 310 – 450 | ≥24 | Most common: HVAC ductwork, simple bends, casings. |
| ASTM | ASTM A653/ A653M | FS | 99% | – | – | – | 170 – 310 | 275 – 410 | ≥30 | Better forming than CS, shallow drawn parts. |
| ASTM | ASTM A653/ A653M | DDS | 99% | – | – | – | 140 – 240 | 275 – 380 | ≥36 | Complex drawn parts, pressings. |
| ASTM | ASTM A653/ A653M | EDDS | 99% | – | – | – | 105 – 170 | 260 – 340 | ≥42 | Most severe drawing requirements (e.g., auto parts). |
| ASTM | ASTM A653/ A653M | SS Grade 33 | 99% | – | – | – | 33 ksi (230 MPa) | 45 ksi (310 MPa) | ≥20 | Light structural applications, roofing. |
| ASTM | ASTM A653/ A653M | SS Grade 37 | 99% | – | – | – | 37 ksi (255 MPa) | 52 ksi (360 MPa) | ≥18 | Purlins, framing (similar to G350/SGC340). |
| ASTM | ASTM A653/ A653M | SS Grade 40 | 99% | – | – | – | 40 ksi (275 MPa) | 55 ksi (380 MPa) | ≥16 | Purlins, PEB framing. |
| ASTM | ASTM A653/ A653M | SS Grade 50 | 99% | – | – | – | 50 ksi (345 MPa) | 65 ksi (450 MPa) | ≥12 | High-strength purlins, structural members. |
| ASTM | ASTM A653/ A653M | SS Grade 60 | 99% | – | – | – | 60 ksi (415 MPa) | 70 ksi (480 MPa) | ≥10 | High-strength PEB framing, purlins. |
| ASTM | ASTM A653/ A653M | SS Grade 70 | 99% | – | – | – | 70 ksi (485 MPa) | 75 ksi (520 MPa) | ≥8 | Steel decking, high-strength structural components. |
| ASTM | ASTM A653/ A653M | SS Grade 80 | 99% | – | – | – | 80 ksi (550 MPa) | 82 ksi (570 MPa) | ≥3 | Highest strength: Steel decking (similar to G550/SGC570). |
| AS | AS 10346 | DX51D | 99% | – | – | – | (Ref. ≥240) | 270 – 500 | ≥22 | Most common: HVAC ductwork, lock-forming, casings, cable trays. |
| AS | AS 10346 | DX52D | 99% | – | – | – | 170 – 300 | 270 – 420 | ≥26 | Forming, shallow drawing. |
| AS | AS 10346 | DX53D | 99% | – | – | – | 150 – 260 | 270 – 380 | ≥30 | Moderate deep drawing parts. |
| AS | AS 10346 | DX54D | 99% | – | – | – | 120 – 220 | 260 – 350 | ≥36 | Complex, deep drawn components. |
| AS | AS 10346 | DX56D | 99% | – | – | – | 120 – 180 | 260 – 320 | ≥40 | Most severe drawing requirements. |
| AS | AS 10346 | S220GD | 99% | – | – | – | ≥220 | ≥300 | ≥20 | Light structural components, partitioning. |
| AS | AS 10346 | S250GD | 99% | – | – | – | ≥250 | ≥330 | ≥19 | Structural members, building frames. |
| AS | AS 10346 | S280GD | 99% | – | – | – | ≥280 | ≥360 | ≥18 | Purlins, trusses. |
| AS | AS 10346 | S320GD | 99% | – | – | – | ≥320 | ≥390 | ≥17 | Load-bearing purlins, PEB structures. |
| AS | AS 10346 | S350GD | 99% | – | – | – | ≥350 | ≥420 | ≥16 | High-strength purlins, heavy-load structures. |
| AS | AS 10346 | S550GD | 99% | – | – | – | ≥550 | ≥560 | ≥1.5 | Highest strength: Steel decking, long-span purlins (requires rigidity). |
MRM Steel specializes in supplying high-quality Galvanzied Steel (GI), ensuring consistent material properties and strict adherence to international standards. For detailed consultation on specific grades and quotations, please contact our Sales Department directly.
Please find the detailed technical specifications below:
Please find the detailed technical specifications below:
Specification
- GI
- Purlin and grits
- ORDERING INFORMATION
| No. | Item | Specification |
| 1 | Standards | JIS G3302, AS 1397, ASTM A653/ A653, EN 10346 |
| 2 | Thickness | 0.25 – 3.75 mm |
| 3 | Coating mass | 60 – 600g / m2 / both side |
| 4 | Width | 860 – 2000 mm |
| 5 | Coil Weight | Up to 30 MT |
| 6 | Surface processing | Skin-pass, Non-Skin-pass |
| 7 | MOQ | 50 MT |
| 8 | Inspection | MTC, SGS / BV / TUV |
Packaging & Delivery
- Export seaworthy packaging
- Delivery time: 20–35 days
- Shipment: bulk vessel or container
