Pre-Galvanised Steel Tube | GS300

Pre-Galvanised Steel Tube | GS300 Specifications

Manufactured using New Zealand made, continuously hot-dipped galvanised G250 steel coil.

GS300 features a Z275 (ZB135/135) coating with external weld seam zinc repair, ensuring coating continuity.
The product features a smooth and consistent surface finish, is highly formable and is particularly suitable for outdoor and corrosion prone environments where long term durability is essential.
Typical applications include outdoor structures, furniture, fencing and conveyors.

Base Material	Continuously hot-dip galvanised (Galvsteel® G250)
Yield Strength	250MPa (BM)
Tensile Strength	320 MPa (BM)
Base Material Standard	(GS): AS/NZS 1365:1996 (R2016), AS 1397:2021
Product standard	AS 1450
Surface Finish	Z275 coating (both sides). Medium Spangle
Coating Suitability	Excellent for Powder Coating and Paint
Standard stocked lengths	5.5m. Custom lengths available.
Tube Profile	Round, Square, Rectangle, Flat-Sided Oval
Tube Thickness	From 1.2mm to 2.5mm
Size Range - Round	From 12.7mm – 76.2mm
Size Range - Square	From 15.9mm to 65.0mm
Size Range - Rectangle	From 25.4x12.7 to 65.5 x 38.1mm
Size Range - FSO	31.8x15.9 to 97.0x42.0
Size Range - Oval	31.8mm x 17.1mm
Typical Applications:	Outdoor structures, furniture, fencing, conveyors

Yield strength	Tensile strength	EI % on Lo=50mm
250 MPa	320 MPa	27

Size (mm)	Product Type & Gauge (mm)	Finish	Nom Linear mass (kg/m)					Length per pack
Size (mm)	GS300	Finish	1.2	1.4	1.6	2.0	2.5	Length per pack
9.5			0.25	0.28	0.31			100
12.7	1.2, 1.6		0.32	0.39	0.44	0.52		100
15.9	1.2, 1.6		0.43	0.50	0.57	0.67		100
19.1	1.2, 1.6, 2.0		0.51	0.61	0.68	0.83	1.02	100
22.2	1.2, 1.6, 2.0		0.61	0.72	0.81	0.98	1.21	100
25.4	1.2, 1.6, 2.0		0.71	0.83	0.93	1.15	1.41	100
28.6	1.2, 1.6		0.78	0.94	1.07	1.32	1.69	48
31.8	1.2, 1.6, 2.0		0.87	1.04	1.17	1.43	1.80	48
34.9	1.2, 1.6		0.99	1.15	1.30	1.60	2.00	48
38.1	1.2, 1.6		0.87	1.04	1.17	1.43	1.80	48
41.3	1.6, 2.0		1.15	1.38	1.52	1.89	2.42	48
44.5	1.6		1.06	1.49	1.65	2.03	2.52	48
47.6			1.35	1.57	1.78	2.19	2.78	48
50.8	1.2, 1.6, 2.0		1.42	1.67	1.88	2.35	3.02	48
54.0			1.56	1.82	2.03	2.53	3.14	48
57.2	1.6		1.61	1.89	2.14	2.66	3.33	24
60.3	2.0		1.72	2.00	2.28	2.80	3.60	24
63.5	1.6		1.71	2.09	2.39	2.99	3.79	24
69.9	2.0			2.35	2.67	3.23	4.16	24
76.2	1.6, 2.0			2.56	2.89	3.59	5.47	24
88.9					3.44	4.28	5.33	10
101.6					3.95	4.91	6.11	10
127.0					4.87	6.04	7.68	8
152.4					5.87	7.57	9.24	8

Size (mm)	Product Type & Gauge (mm)	Finish	Nom Linear mass (kg/m)					Length per pack
Size (mm)	GS300	Finish	1.2	1.4	1.6	2.0	2.5	Length per pack
12.7x12.7			0.41	0.48	0.53			100
15.9x15.9	1.6		0.51	0.60	0.66	0.83		100
19.1x19.1	1.2, 1.6		0.64	0.75	0.83	1.00		100
22.2x22.2	1.6		0.78	0.89	1.03	1.25		100
25.4x25.4	1.2, 1.4, 1.6, 2.0		0.89	1.03	1.17	1.42	1.75	100
31.8x31.8	1.2, 1.4, 1.6, 2.0		1.11	1.31	1.48	1.79	2.24	50
34.9x34.9	1.2, 1.4, 1.6, 2.0		1.22	1.42	1.63	2.01	2.51	49
38.1x38.1	1.6, 2.0		1.32	1.57	1.78	2.13	2.75	49
40.0x40.0	2.0		1.43	1.67	1.89	2.26	3.06	49
50.8x50.8	1.6, 2.0		1.81	2.10	2.40	3.94	3.69	49
65.0x65.0	1.6, 2.0			2.78	3.08	3.58	4.78	30

Size (mm)	Product Type & Gauge (mm)	Finish	Nom Linear mass (kg/m)					Length per pack
Size (mm)	GS300	Finish	1.2	1.4	1.6	2.0	2.5	Length per pack
25.4x12.7	1.6		0.65	0.76	0.84	1.06		50
31.8x15.9			0.82	1.00	1.13	1.42		50
34.9x19.1	1.2, 1.6		0.95	1.00	1.13	1.42		50
38.1x25.4			1.13	1.50	1.76	1.79	2.24	49
46.5x21.2			1.06	1.49	1.65	2.03	2.52	50
50.8x24.5	1.2, 1.6, 2.0		1.35	1.62	1.82	2.25	2.78	50
50.8x31.8			1.49	1.74	1.95	2.45	2.94	50
57.2x34.9			1.61	1.89	2.14	2.66	3.33	50
60.0x30.0			1.61	1.89	2.14	2.66	3.33	50
63.5x38.1	1.6		1.84	2.09	2.39	2.99	3.26	50
68.0x14.0			1.43	1.67	1.91	2.39		100
68.0x43.0			1.97	2.35	2.67	3.23	4.16	50
70.0x11.0			1.43	1.67	1.91	2.39		100

Size (mm)	Product Type & Gauge (mm)	Finish	Nom Linear mass (kg/m)					Length per pack
Size (mm)	GS300	Finish	1.2	1.4	1.6	2.0	2.5	Length per pack
19.0x12.0		OV	0.43	0.50	0.56	0.67		50
25.4x15.9		FSO	0.65	0.75	0.83	1.00		50
31.8x15.9	1.6	FSO	0.71	0.83	0.93	1.15		50
31.8x17.1		OV	0.71	0.83	0.93	1.15		50
32.0x22.0		OV	0.74	0.89	1.01	1.26		50
34.9x15.9		FSO	0.78	0.94	1.07	1.32		50
50.8x15.9		FSO	1.07	1.26	1.36	1.78		50
54.0x35.0		FSO	1.35	1.57	1.79	2.19	2.78	49
59.0x30.0		OV	1.35	1.57	1.79	2.19	2.78	49
72.0x45.0	1.2	FSO	1.81	2.14	2.42	3.02	3.85	42
97.0x42.0	2.0	FSO			2.89	3.59	4.54	24