MAXIMUM PROTECTION
AGAINST CORROSION

Product Specification
 
 
Grade And Symbol   Unit: mm
  Classified Symbol   Nominal Thickness (mm)   Application
  SGCC (Soft)   0.19 ≥ 1.55   Commercial Quality
  SGC440 (Semi Hard)   0.23 ≥ 1.55   Structural Quality
  SGCH (Full Hard)   0.156 ≥ 1.55   Commercial Quality, Hard Class
 
Standard Coating Mass   Unit: mm
  Nominal Thickness   Symbol Indicating Weight of Zinc Coating   Equivalent Coating Thickness
  0.156 to 0.176   Z08   0.017
  0.19 to 0.45   Z12   0.026
  0.48 to 0.60   Z18   0.034
  0.70 to 1.55   Z22   0.043
* Other coating masses are available upon request.
 
Minimum Coating Mass
  Classification /Coating Symbol for coating mass on both surfaces Average coating mass in triple-spot test on both surfaces Minimum coating mass at a single spot on both surfaces
  Non Alloyed (GI)   Z08   80   68
  Z10   100   85
  Z12   120   102
  Z15   150   124
  Z18   180   153
  Z20   200   170
  Z22   220   187
  Z25   250   213
  Z27   275   234
Remarks:
1. The average coating mass in the triple-spot test on both surfaces shall be the average of measured coating masses of three test pieces cut from the test specimen.
2. The minimum coating mass at a single spot on both surfaces shall be the smallest of the measured coating masses of three test pieces cut from the test specimen.
 
Standard Nominal Thickness & Width
  Width (mm)   Thickness (mm)
  1219   (BMT) 0.30, 0.35, 0.40, 0.45, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.20, 1.55
  (TCT) 0.50, 0.70, 0.80, 1.00, 1.20, 1.50
  914   (BMT) 0.156, 0.176, 0.19, 0.22, 0.25, 0.28, 0.30, 0.34, 0.40, 0.42, 0.48, 0.50
  762 (for Corrugated Sheet)   (TCT) 0.18, 0.20, 0.23, 0.33
Remarks: Other thicknesses and widths are available upon request.
 
Standard Width & Length For Cut Sheets
  Standard Width (mm)   Standard Length (mm)
  1219 (Plain Sheet)   2438
  914 (Plain Sheet)   2438
  762 (for Corrugated Sheet)   1829, 2134, 2438, 2743, 3048, 3353, 3658
Remarks: Other lengths are available upon request.
 
Thickness Tolerance Unit (mm)
  Nominal Thickness (mm) Width (mm)
  630 and above up to 1000   1000 and above up to 1250
  Up to 0.25   ±0.04   ±0.04
  0.25 and above up to 0.40   ±0.05   ±0.05
  0.40 and above up to 0.60   ±0.06   ±0.06
  0.60 and above up to 0.80   ±0.07   ±0.07
  0.80 and above up to 1.00   ±0.07   ±0.08
  1.00 and above up to 1.25   ±0.08   ±0.09
  1.25 and above up to 1.55   ±0.10   ±0.11
 
Coil Size & Weight
  Inner Diameter   508mm (20")
  Outer Diameter   1300mm Max for 1219mm width
  1450mm Max for 941mm width
  1600mm Max for 762mm width
  Minimum Coil Weight   2,000kgs~ for 0.30mm and below
  2,500kgs~ for 0.34mm to 1.00mm
  3,500kgs~ for 1.20mm and above
  Maximum Coil Weight   10,000kgs
 
Mechanical Properties
Mechanical Properties
Steel Base
SGCH SGC440 SGCC
Guaranteed Typical Guaranteed Typical Guaranteed Typical
Longitudinal Tensile
Yield Strength, Mpa
550 min 600-750 440 min 440-550 270 min 340-400
Tensile Strength, Mpa 550 min 600-750 335 min 380-550 205 min 320-400
Elongation % - 2-7 - 11-20 - 24-29
Above are the typical mechanical properties. They are intended solely to provide purchaser with as much information as possible to make an informed decision on the steel grade to be specified.
 
Types of Surface Finishes Available
  Types of Spangle   Minimised Spangle, Skin-Passed (Extra Smooth)
  Coating Mass (Standard)   Z08, Z12, Z18, Z22
  Type of Surface Treatment   Cr6+ Passivated (GalMaxx®) – Suitable for general application
  Chrome Free (GalMaxx® Eco) - Suitable for Electrical Appliances & Automotive Accessories
  Resin Coating (GalMaxx® Premium) – Suitable for Steel Roof Truss, Batten & Purlin
* Other coating masses are available upon request.
 
Chemical Composition
  ELEMENT SGCH SGCC
Guaranteed Typical Guaranteed Typical
  Carbon (c)   0.14 Max   0.03-0.06   0.15 Max   0.11-0.13
  Manganese (M)   0.60 Max   0.12-0.34   0.60 Max   0.45-0.51
  Phosphorus (P)   0.10 Max   0.009-0.019   0.10 Max   0.012-0.025
  Sulphur (S)   0.05 Max   0.003-0.014   0.05 Max   0.003-0.006