What Does "GAUGE" In Aluminum Plate Mean?

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Ga. is the abbreviation of GAUGE, a length measurement unit of diameter originating in North America, belonging to the Brown & Sharpe measurement system. At the beginning of 1869, J.R. Brown and L. Sharp of the United States sold the outer micrometer developed for commercial sale, and initially established the measurement system. Originally used in medicine and jewelry, the larger the number, the smaller the diameter, and it was later popularized to indicate thickness.

GAUGE Measurement tool

GAUGE Measurement Tool

GAUGE

When the non-ferrous metal plate and the steel plate are of same Ga., the thickness is actually different, and the values of the plates and pipes of the same Ga. are also different.

Example:

16Ga. Corresponding:

Steel thickness is 0.0598 inches;
Aluminum thickness is 0.0508 inches

“GAUGE” Comparison Table Of Aluminium And Steel

1 ga = 1/100 mil = 1/100,000 inch = 25.4/100000 millimetre = 0.254 micrometre

Aluminum Thickness		Gauge (Ga.)	Standard Steel Thickness
(mm)	(inches)	Gauge (Ga.)	(mm)	(inches)
5.82676	0.2294	3	6.07314	0.2391
5.18922	0.2043	4	5.69468	0.2242
4.62026	0.1819	5	5.31368	0.2092
4.1148	0.162	6	4.93522	0.1943
3.66522	0.1443	7	4.55422	0.1793
3.2629	0.1285	8	4.17576	0.1644
2.90576	0.1144	9	3.7973	0.1495
2.58826	0.1019	10	3.4163	0.1345
2.30378	0.0907	11	3.03784	0.1196
2.05232	0.0808	12	2.65684	0.1046
1.8288	0.072	13	2.27838	0.0897
1.62814	0.0641	14	1.89738	0.0747
1.45034	0.0571	15	1.70942	0.0673
1.29032	0.0508	16	1.51892	0.0598
1.15062	0.0453	17	1.36652	0.0538
1.02362	0.0403	18	1.21412	0.0478
0.91186	0.0359	19	1.06172	0.0418
0.8128	0.032	20	0.91186	0.0359
0.7239	0.0258	21	0.83566	0.0329
0.64262	0.0253	22	0.75946	0.0299
0.57404	0.0226	23	0.68326	0.0269
0.51054	0.0201	24	0.60706	0.0239
0.45466	0.0179	25	0.53086	0.0209
0.40386	0.0159	26	0.45466	0.0179
0.36068	0.0142	27	0.41656	0.0164
0.32004	0.0126	28	0.37846	0.0149
0.28702	0.0113	29	0.3429	0.0135
0.254	0.01	30	0.3048	0.012
0.22606	0.0089	31	0.2667	0.0105
0.2032	0.008	32	0.24638	0.0097
0.18034	0.0071	33	0.2286	0.009
0.16002	0.0063	34	0.20828	0.0082
0.14224	0.0056	35	0.1905	0.0075

From: GAUGE

Common Aluminum Plate Specification Thickness:

6 gauge aluminum thickness sheet

8 gauge aluminum thickness sheet

10 gauge aluminum thickness sheet

12 ga aluminum thickness sheet

14 gauge aluminum thickness sheet

16 ga aluminum thickness sheet

18 ga aluminum thickness sheet

22 gauge aluminum thickness sheet

24 ga aluminum thickness sheet

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