Prepainted Galvanised Steel Coil/PPGI/Corrugated Roofing Sheets
Coil
What are the Characteristics of the Galvalume steel coil?
Because it is produced through applying Al-Zn coat on both faces by
hot dip process. It enjoys both the physical protective feature and
durability of Al and the electrochemical protective property of Zn.
>>Machinability: It can satisfy the processing requirements
of rolling, coiling and others processes alike.
>>Thermal resistance: Common HDG steel plate normally works
under 230℃, and has its color changed at 250℃, however, Galvalume
steel plate can sustain the environment at 315℃ for long time.
>>High reflectivity: Reflection ability of heat and light is
twice as much as those of hot-dip zinc steel sheet, and its
reflectivity is more than 0.70, which is an ideal construction
materials of saving energy.
Specifications
ASTM A240, A666
Typical Applications
Typical applications for Types 201 are cookware, hose clamps,
piston rings, transit car structural member, transit car
roofing/siding, thermal window spacers, air bag containers, and
truck trailer posts and door frames.
Chemical Composition
Products | Gi coil |
Grade | SGCH,SGCC,DX51D,DC51D,ASTM A653 |
Standard | JIS G3302,JIS G3312,EN10142,ASTM A653M |
Thickness | 0.12mm-1.2mm |
Width | 600mm-1250mm |
Zinc coating | 30-275g/m2 |
Delivery time | 20 days after receiving LC or deposit. |
Payment terms | L/C,D/A,D/P,T/T,Western Union |
Supply ablitity | 10000 Metric Ton/Metric Tons per Month |
MOQ | 1 Metric Ton/Metric Tons |
Application | Mechanical&manufacture,Steel structure,Shipbuilding,Bridging |
Mechanical Properties
Type | Yield Strength 0.2% offset (KSI) | Tensile Strength (KSI) | % Elongation(2" Gauge length) | Hardness Rockwell |
201 Ann | 38 min. | 75 min. | 40% min. | HRB 95 max. |
201 ¼ Hard | 75 min. | 125 min. | 25.0 min. | 25 – 32 HRC (typical) |
201 ½ Hard | 110 min. | 150 min. | 18.0 min. | 32 - 37 HRC (typical) |
201 ¾ Hard | 135 min. | 175 min. | 12.0 min. | 37 – 41 HRC (typical) |
201 Full Hard | 145 min. | 185 min. | 9.0 min. | 41 – 46 HRC (typical) |
Physical Properties
Density (lb./ in^2) @ RT | | 0.283 |
Modulus of Elasticity in Tension (psi x 10^6) | | 28.6 |
Specific Heat (BTU/°F/lb.) | 32 to 212 °F | 0.12 |
Thermal Conductivity (BTU/hr/ft^2/ft) | 212°F | 9.4 |
Mean Coefficient of Thermal Expansion (in. x 10^-6 per °F) | 32 to 212°F | 8.7 |
| 32 to 600°F | 9.7 |
| 32 to 1,000°F | 10.2 |
Electrical Resistivity (micro ohms - cm) | at 70°F | 69 |
Melting Point Range (°F) | | 2550/2650 |
Oxidation Resistance - Continuous Service(°F) | | 1550 |
Oxidation Resistance - Intermittent Service(°F) | | 1500 |
Processing
The annealing temperature for Type 201 is between 1850-2000°F.
Rapid cooling through the carbide precipitation range (1500 – 800
°F) is necessary to keep the carbides in solution and prevent
sensitization. Type 201 is not hardenable by thermal treatment; it
is only hardenable by cold working.
Forming
Type 201 has similar bending, forming and drawing characteristics
to Type 301 stainless steel
Welding
Type 201 can be welded by all conventional methods applied to 18
percent chromium, 8 percent nickel steels. Filler metal of the
conventional chromium-nickel analyses can be used. Like other
austenitic stainless steels where carbon is not controlled below
0.03%, Type 201 is susceptible to intergranular corrosion in the
weld heat affected zone.
Corrosion
Type 201 is resistant to a wide variety of mild to moderately
corrosive environments. It has corrosion resistance approaching
that of Types 301and has been successfully substituted for 304 in
many mild environments.
