ASTM A792 SS Gr.37 (255) Prepainted Galvalume Coil

Specification of Prepainted Galvalume Coil

Thickness: 0.1-1.0mm

Width: 30-1500mm

Color: As RAL color number or Customized

Painting Thickness: Primer 8μm (Max), Top coat 25μm (Max),Backer coat 5+15μm (Max),

Coating Mass: AZM15-AZM150

Steel Standard: ASTM A792/A792M

Steel Grade: ASTM A792 SS Gr.37

Yield Strength: 255Mpa (Min)

Tensile Strength: 360Mpa (Min)

Elongation: 18% (Min)

Prepainted-Galvalume-Coil(2)482210.jpg

On this photo, you can see a inspector is testing the paint coating by using a paint coating test machine.

Every coil will be tested after finished production, the labor will cut a piece from the mother coil to test the thickness, width, coating mass, paint coating, color accuracy, hardness, yield strength, tensile strength,

elongation, bending test, etc. and keep all the digital and the sample in our labory.

By this way, it not only ensure the quality, but also can be a proof for better after-sale service.

You can see a box in fron of the inspector, this is a light box can be simulated sunlight, put the PPGL sample into this box will help our inspector to check the color.

The specific requirement of ASTM A792 SS Gr.37 (255)

Weight [Mass] of Coating Requirements

Coating Designation	Minimum Requirements
	Triple-Spot Test	Single-Spot Test
	Inch-Pound Units
	Total Both Sides, oz/ft2	Total Both Sides, oz/ft2
AZ30	0.30	0.26
AZ35	0.35	0.30
AZ40	0.40	0.35
AZ50	0.50	0.43
AZ55	0.55	0.50
AZ60	0.60	0.52
AZ70	0.70	0.60

Coating Designation	Minimum Requirements
	Triple-Spot Test	Single-Spot Test
	SI Units
	Total Both Sides, g/m2	Total Both Sides, g/m2
AZM100	100	85
AZM110	110	95
AZM120	120	105
AZM150	150	130
AZM165	165	150
AZM180	180	155
AZM210	210	180

Chemical Requirements of SS Grade 37[255]

Designation	Composition, %—Heat Analysis Element, maximum, Unless Otherwise Shown
Designation	C	Mn	P	S	Cu	Ni	Cr	Mo	V	Cb	Ti	N
SS Grade 37[255]	0.20	1.35	0.10	0.04	0.25	0.20	0.15	0.06	0.008	0.008	0.025	...

Mechanical Property Requirements, Structural Steel Base Metal (Longitudinal)

SI Units
Grade	Yield Strength, min, MPa	Tensile Strength, min, MPa	Elongation in 50 mm, min, %
230	230	310	20
255	255	360	18
275	275	380	16
340 Class1	340	450	12
340 Class2	340	...	12
340 Class3	340	410	12
410	410	480	10
480	480	550	9
550 Class1	550	570	...
550 Class2	550	570	...
550 Class3	550	570	3

Coating Bend Test Requirements—Structural Steel

Grade	Ratio of the Inside Bend Diameter to Thickness of the Specimen (Any Direction)
33 [230]	1 1⁄2
37 [255]	2
40 [275]	2 1⁄2
50 Class 1, Class 2, and Class 4	A
60	A
70	A
[340 Class 1, Class 2, and Class 4]	/
80 Class 1, Class 2, and Class 3	A
[550 Class 1, Class 2, and Class 3]	/

A: Grades not subject to bend test requirements.

Suggested Minimum Inside Radii for Cold Bending

Designation	Grade	Minimum Inside Radius for Cold Bending
Structural Steel	33 [230]	1 1⁄2 t
	37 [255]	2t
	40 [275]	2t
	50 Class 1, Class 2, and Class 4 [340 Class 1, Class 2, and Class 4]	not applicable
	60 [410]	not applicable
	70 [480]	not applicable
	80 class 1, Class 2, and Class 3 [550 Class 1, Class 2, and Class 3]	not applicable

Prepainted-Galvalume-Coil(6).jpg

This photo shows dark green color PPGL coil, it can be produced to dark green roof sheets in buildings.

Pre-painted galvalume coil also called PPGL coil, which is covers steel sheet metallic coated by the hot-dip process and coil-coated with organic films for exterior exposed building products. Sheet of this designation is furnished in coils, cut lengths, and formed cut lengths. Building products include corrugated and various types of roll and brake-formed configurations.

This photo shows the PPGL and galvalume coils were loading in the bottom of cabin.

You can see the packages of some PPGL coils are in different color, they are customized packing by clients, they want to clear the outer package of PPGL coils in different colors.

The coils are loading in bottom of cabin, it because steel coils are heavy cargo and not afraid being pressed, mates usually mamages heavy goods in bottom and light goods piled upper.

We XINO Steel is one of the biggest professional manufacture of coating steel coils in China, our main products include PPGL, PPGI, GI, GL coils. We owns 4 production areas in total, the annual output of one factory is more than 600,000 metric tons.

PPGL

ASTM A792 SS Gr.37 (255) Prepainted Galvalume Coil