flattened expanded metal sheet, cold rolled expanded metal

FLATTENED EXPANDED METAL

AMICO Flattened Expanded Metal is made by passing standard (raised) expanded metal through a cold roll press, which flattens the strands and bonds into a smooth, even surface. This process reduces the overall thickness, creates a more uniform appearance, and improves ease of handling and fabrication.

Flattened expanded metal is commonly used in architectural panels, guards, screens, and enclosures where a sleek look and smooth finish are preferred, while still maintaining strength, durability, and good airflow or visibility.

Metals commonly expanded include but are not limited to…

Steel-Cold Rolled (CRS)
Hot Rolled (HRS)
Electro Galvanized Steel
Stainless Steel
Aluminum
Titanium
Brass
Copper

Products

Drawings

Flattened expanded metal is defined by Type, Class and Grade per ASTM F1267. Type and Class are required when specifying and ordering.

Type I—Expanded

Type II—Expanded and flattened

Class 1—Uncoated.

Class 2—Hot-dip zinc-coated (galvanized).

Class 3—Corrosion-resisting steel.

Grade A—0.0025 in. (0.06 mm) minimum coating thickness.

Grade B—0.0012 in. (0.03 mm) minimum coating thickness.

The illustration to the right shows that the strands and bonds form a sharp angle to the original plane of the solid sheet.

Sheets are expanded in the regular form and then passed through a cold rolled reducing mill. This process elongates the length of the sheet about 5%. The width of the sheet remains the same. The sheet is then sent through a leveler to maintain its flatness.

Tables

Style and Listing	Min. Thickness in -inches (A)	Nominal weight in lbs. Per 100-Sq Ft (B)	Design Size - Inches (C) SWD	Design Size - Inches (C) LWD	Design Size - Inches (C) SWO	Design Size - Inches (C) LWO	Strand Size - Inches (C) Width	Strand Size - Inches (C) Thickness	Overall Thickness (Inches)	Number of Diamonds per ft SWD	Number of Diamonds per ft LWD	% Open Area
FLATTENED CARBON STEEL - ASTM A1011
1/4" - #20	.026	74	.250	1.05	.092	.715	.079	.029	.029	48	11.4	37
1/4" - #18	.034	100	.250	1.05	.090	.715	.080	.038	.038	48	11.4	36
1/2" - #20	.026	37	.500	1.26	.342	1.000	.079	.029	.029	24	9.5	68
1/2" - #18	.034	61	.500	1.26	.306	1.000	.097	.038	.038	24	9.6	61
1/2" - #16	.043	77	.500	1.26	.304	1.000	.098	.048	.048	24	9.5	61
1/2" - #13	.066	126	.500	1.26	.286	1.000	.107	.072	.072	24	9.5	57
3/4" - #16	.043	47	.923	2.10	.701	1.750	.111	.048	.048	13	5.7	76
3/4" - #14	.054	56	.923	2.10	.713	1.760	.105	.060	.060	13	5.7	77
3/4" - #13	.066	67	.923	2.10	.711	1.781	.106	.072	.072	13	5.7	77
3/4" - #10	.066	102	.923	2.10	.603	1.755	.160	.072	.072	13	5.7	65
3/4" - # 9	.101	157	.923	2.10	.593	1.688	.165	.108	.108	13	5.7	64
1" - #16	.043	38	1.00	2.52	.804	2.250	.098	.048	.048	12	4.8	80
1-1/2" - #16	.043	35	1.33	3.15	1.092	2.750	.119	.048	.048	9	3.8	82
1-1/2" - #14	.054	43	1.33	3.15	1.098	2.750	.116	.060	.060	9	3.8	83
1-1/2" - #13	.066	51	1.33	3.15	1.098	2.750	.116	.072	.072	9	3.8	83
1-1/2" - # 9	.101	105	1.33	3.15	1.014	2.563	.158	.108	.108	9	3.8	76

Patterns

1/4″ 20R

3/4″ 9R

1/2″ 13R

1-1/2″ 9R

Edge Condition

Closed diamonds all four sides. No open diamonds.

Random shear 1 side and 1 end causing open diamonds on 1 side and 1 end.

Random shear 2 sides causing open diamonds on both LWD’s

Random shear 2 LWD sides causing open diamonds on LWD.

Random shear 4 edges causing open diamonds on all 4 sides.

Orientation

When describing or ordering expanded metal the SWD (Short Way of Diamond) is referenced first and the LWD (Long Way of Diamond) is listed second. The illustration on the left is standard orientation with the SWD running the short length of the panel.

The illustration on the right shows reverse diamond with the SWD running the long length of the panel.