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Galvanized steel sheet

SSSC’s galvanized steel sheet in coil (GI) is produced by the advanced NOF hot-dip continuous galvanizing line. The product has a very good corrosion resistance in the natural surroundings.

SSSC’s GI coil has the glossy surfaces, its machinability is suitable for applications of fabrication, forming, etc.

The SSSC’s GI is manufactured in accordance with the standards: JIS G3302, ASTM A653/A653M, SSSC’s standard: TCTMK.

Specifications of product

Thickness (mm) 0.16 to 2.00
Width (mm) 1250
Unit coil weight (ton) 25
Average coating mass in triple-spot on both sides 300
Coil inner diameter (mm) 508 or 610

Coating treatment

  • Regular spangle
  • Mini spangle
  • Zero spangle

Finishing

  • Chromated treatment
  • Oiling
  • Or Anti-finger (color, no color)

Production process chart

QUALITY STANDARDS (SSSC’s standard – TCTMK)

T-BEND: ≤ 3T

Coating thickness

Coating standard  

Minimum average coating mass on both sides at triple-spot (g/m2)

 

Minimum coating mass on both sides at single-spot (g/m2)

Z05 50 43
Z06 60 51
Z08 80 68
Z10 100 85
Z12 120 102
Z18 180 153
Z20 200 170
Z22 220 187
Z25 250 213
Z27 275 234

* Remarks: The standards of other coating thickness shall be agreed by the manufacturer and the purchaser.

Appearance: The product must be free from defects that are detrimental to its practical use.

Thickness tolerances

Nominal thickness Width < 1000 mm Width ≥ 1000 mm
< 0,25 ± 0,04 ± 0,04
0,25 ÷ < 0,40 ± 0,05 ± 0,05
0,40 ÷ < 0,60 ± 0,06 ± 0,06
0,60 ÷ < 0,80 ± 0,07 ± 0,07
0,80 ÷ < 1,00 ± 0,07 ± 0,08
1,00 ÷ < 1,25 ± 0,08 ± 0,08
1,00 ÷ < 1,25 ± 0,08 ± 0,09
1,25 ÷ < 1,50 ± 0,10 ± 0,11

Width tolerances: 0 ÷ + 7mm

Flatness

Unit: mm

Width Type
  Wavy-edge (max) Center buckling (max)
< 1000 mm 8 6
≥ 1000 mm 9 8

Physical properties

  Thickness (t) mm H1 S1 S2
Tensile Strength (Mpa) 0.30 ≤ t 550 - 800 270 - 400 401 - 549
Yield Point(Mpa) 0.30 ≤ t - ≥ 205 ≥ 295
Elongation (%)(%) 0.30 ≤ t <0.40 - ≥ 31 ≥ 10
0.40 ≤ t <0.60 - ≥ 34 ≥ 10
0.60 ≤ t <1.0 - ≥ 36 ≥ 10
1.0 ≤ t <1.6 - ≥ 37 ≥ 10

MARKING, PACKING AND MAINTENANCE

Packing

The product is packed either in accordance with the SSSC’s regulation or the customer’s requirement.

Transport and maintenance:

Transport: Transporting the product must avoid a big impact, which may be detrimental to quality, shape and appearance of the product.
Maintenance: It complies with the guide on maintenance attached on the product.

APPLICATIONS