ISA Weight Chart

Q: What are hot rolled unequal angles?

Hot rolled unequal angles are steel sections with a 90 degree angle, but the two sides (legs) have different widths, forming an L-shaped profile. These sections are commonly used in structural applications like frameworks, bridges, and support structures where unequal load distribution is needed.

Q: What is the difference between equal and unequal ISA angles?

Equal angles have two legs of the same length and are used where load is distributed evenly. Unequal angles have two legs of different lengths and are used where one face needs more material for strength or connection purposes than the other.

ISA angle weight (kg/m) = 0.00785 × (A + B − T) × T, where A and B are the two leg lengths (mm) and T is the thickness (mm). Example: for an ISA 50×50×6 angle, weight = 0.00785 × (50 + 50 − 6) × 6 = 4.4 kg/m (matches the MS Angle table below).

What is ISA?

ISA (Indian Standard Angle) is a hot-rolled structural steel section with an L-shaped cross-section, standardised under IS 808. ISA angles are manufactured as equal angles (both legs the same length) or unequal angles (legs of different lengths), and are widely used in structural framing, construction, bridges, towers, and general fabrication where a rigid corner or edge section is needed.

ISA, or Indian Standard Angle, refers to rolled steel angle sections. These sections are classified by their thickness and length and are widely used in construction and engineering due to their strength and durability.

An ISA weight chart helps manufacturers determine the exact weight of the angles, which is crucial for understanding the load capacity in structural applications. By knowing the weight, manufacturers can better estimate the amount of material needed for a project, helping to reduce waste and lower overall costs.

Need channel section weights instead of angles? Try our Channel Weight Calculator.

Indian Standard Angle Specification

ISA Size	75 mm to 250 mm
Types	Equal angle Unequal angle Bulb angle
Equal angle size	130 x 130 x 8 mm
Unequal angle size	200 x 100 x 10 mm
Lenght	11 to 13m
Applications	Structural application Construction Frames Bridges Warehouse shelves
Materials and grades	Mild steel : SS400,S235JR, q235, SS490, ST37 HSLA carbon steel angle : A588 and A572
Shape	V shaped L shape

HS Code for ISA Angle

Product Classification	HS Code	Notes
Angles, shapes and sections of iron or non-alloy steel	7216.10	Covers equal angle sections under 80mm leg width
Other angles, shapes and sections	7216.99	Applies to larger or non-standard angle profiles

ISA MS Angle Sizes and Dimensions

Knowing the sizes and dimensions of ISA MS angles is essential for ensuring the structural strength of a project. Accurate measurements help engineers in precise project planning, ensuring all components fit together as per the required specifications. This attention to detail improves overall project integrity and helps maintain safety standards.

Looking to source ISA angle sections? See our Carbon Steel Products range, or contact our team with your required sizes and quantity.

Isa - Hot - Rolled Steel Equal Angles

Hot rolled steel equal angles ISA weight as per IS : 808, 1976 and Part V
Designation	Thickness (mm)	Size (mm X mm)	ISA Weight per meter (in Kg)
ISA 2020	4	20 x 20	1.1
ISA 2020	3	20 x 20	0.9
ISA 3030	3	30 x 30	1.4
	4		1.8
	5		2.2
ISA 5555	5	55 x 55	4.1
	6		4.9
	8		6.4
	10		7.9
ISA 2525	3	25 x 25	1.1
	4		1.4
	5		1.8
ISA 3535	3	35 x 35	1.6
	4		2.1
	5		2.6
	6		3
ISA 4545	3	45 x 45	2.1
	4		2.7
	5		3.4
	6		4
IS4040	3	40 x 40	1.8
	4		2.4
	5		3
	6		3.5
ISA 5050	3	50 x 50	2.3
	4		3
	5		3.8
	6		4.5
	7		5.15
	8		5.82
ISA 6565	5	65 x 65	4.9
	6		5.8
	8		7.7
	10		9.4
ISA 6060	4	60 x 60	3.7
	5		4.5
	6		5.4
	8		7
	10		8.6
ISA 7575	5	75 x 75	5.7
	6		6.8
	8		8.9
	10		11
ISA 100100	6	100 x 100	9.2
	6.5		9.99
	8		12.1
	10		14.9
	12		17.7
	15		21.9


ISA 7070	5	70 x 70	5.3
	6		6.3
	7		7.38
	8		8.3
	10		10.2
ISA 9090	6	90 x 90	8.2
	8		10.8
	10		13.4
	12		15.8
ISA 200200	12	200 x 200	36.9
	16		48.5
	20		60
	24		71.1
	25		73.9
ISA 110110	8	110 x 110	13.4
	10		16.6
	12		19.7
	16		25.7
ISA 8080	6	80 x 80	7.3
	8		9.6
	10		11.8
	12		14
ISA 130130	8	130 x 130	15.9
	10		19.7
	12		23.5
	16		30.7
ISA 120120	8	120 x 120	14.7
	10		18.2
	12		21.6
	15		26.6
ISA 180180	15	180 x 180	40.9
	18		48.6
	20		53.7
ISA 150150	10	150 x 150	22.9
	12		27.3
	15		33
	16		35.8
	18		40.1
	20		44.1

Ms Angle

MS Angle
Size	ISA 50 x 50 x 6	ISA 65 x 65 x 6	ISA 65 x 65 x 8	ISA 65 x 65 x10	ISA 75 x 75 x 6	ISA 75 x 75 x 8	ISA 75 x 75 x 10	ISA 90 x 90 x 6	ISA 90 x 90 x 8	ISA 90 x 90 x 10	ISA 100 x 100 x 8
Weight (Kgs. Per Feet)	1.371	1.768	2.347	2.865	2.073	2.713	3.353	2.5	3.292	4.085	3.689
Size	ISA 100 x 100 x 10	ISA 100 x 100 x 12	ISA 110 x 110 x 10	ISA 110 x 110 x 12	ISA 130 x 130 x 10	ISA 130 x 130 x 12	ISA 150 x 150 x 16	ISA 150 x 150 x 20	ISA 200 x 200 x 16	ISA 200 x 200 x 20
Weight (Kgs. Per Feet)	4.542	5.396	5.06	6.006	6.006	7.134	10.914	13.445	14.786	18.292

Isa - Hot - Rolled Steel Unequal Angles

Designation	Size (mm x mm)	Thickness (mm)	Weight per meter (kg)
ISA 3020	30 x 20	3	1.4
ISA 4020	40 x 20	3	1.5
ISA 4025	40 x 25	3	1.7
ISA 4530	45 x 30	3	2.3
ISA 5030	50 x 30	3	2.5
ISA 5030	50 x 30	5	3.9
ISA 5636	56 x 36	5	4.4
ISA 6040	60 x 40	5	4.8
ISA 6545	65 x 45	5	5.2
ISA 7045	70 x 45	5	5.5
ISA 7550	75 x 50	5	6.3
ISA 7550	75 x 50	6	7.4
ISA 8050	80 x 50	5	6.7
ISA 8050	80 x 50	6	7.7
ISA 9060	90 x 60	6	8.5
ISA 9060	90 x 60	8	11.0
ISA 10065	100 x 65	8	12.3
ISA 10065	100 x 65	12	17.0
ISA 10075	100 x 75	8	13.8
ISA 12575	125 x 75	8	15.4
ISA 12575	125 x 75	10	19.0
ISA 12590	125 x 90	12	23.3
ISA 15075	150 x 75	10	23.0
ISA 15090	150 x 90	12	28.3
ISA 150115	150 x 115	12	30.0
ISA 200100	200 x 100	10	29.8
ISA 200100	200 x 100	12	35.6
ISA 200150	200 x 150	12	41.2
ISA 200150	200 x 150	16	42.3

Ismc - Hot-rolled Steel Sections - Medium Channels (Sloping Flanges)

Designation	Weight per metre (in kg)	Sectional Area (cm²)	Depth of Channel (mm)	Width of Flange (mm)	Thickness of Flange (mm)	Thickness of Web (mm)
ISMC 75	7.14	9.1	75	40	7.6	4.8
ISMC 100	9.56	12.2	100	50	8.7	5.3
ISMC 125	13.1	17.1	125	65	8.1	6.0
ISMC 125+	13.7	17.5	125	66	8.1	6.0
ISMC 150	16.8	21.3	150	75	9.0	6.7
ISMC 150+	19.7	22.6	150	76	9.0	7.0
ISMC 175	21.7	27.5	175	75	10.2	7.6
ISMC 175+	21.7	27.5	175	76	10.2	7.6
ISMC 200	23.3	28.1	200	75	11.4	6.2
ISMC 200+	24.2	29.2	200	76	11.4	6.2
ISMC 225	26.1	33.3	225	80	12.4	6.5
ISMC 225+	26.1	33.3	225	83	12.4	6.5
ISMC 250	30.6	39.0	250	82	13.0	7.2
ISMC 250+	34.2	41.5	250	83	14.1	7.2
ISMC 250++	36.1	43.8	250	90	14.1	7.8
ISMC 300	36.3	46.3	300	90	13.6	8.5

Ismb - Hot-rolled Steel Sections - Medium Weight Beams

Designation	Weight per metre (in Kg)	Sectional Area (cm²)	Depth of Beam (mm)	Width of Flange (mm)	Thickness of Flange (mm)	Thickness of Web (mm)
SMB 100	11.5	14.6	100	70	7.2	4.0
SMB 125	13.0	16.6	125	70	7.6	4.4
SMB 150	14.3	18.2	150	75	7.6	4.8
SMB 175	19.9	25.40	175	85	8.6	5.5
SMB 200	26.4	32.33	200	100	10.8	6.7
SMB 225	31.2	39.72	225	110	11.8	6.8
SMB 250	37.3	47.55	250	125	12.5	6.9
SMB 300	44.2	56.26	300	140	12.4	7.5
SMB 350	52.4	66.71	350	140	14.2	8.1
SMB 400	61.6	78.48	400	140	16.0	8.9
SMB 450	72.4	92.27	450	150	17.4	9.4
SMB 500	86.9	110.74	500	180	17.2	10.2

M.S.Flat

Size	Weight in Kgs. Per Feet	Weight in Kgs. per Mtr.
12x3	0.086	0.282
12x5	0.143	0.471
16x5	0.192	0.628
18x4	0.172	0.565
20x3	0.143	0.471
20x5	0.239	0.785
20x6	0.287	0.942
25x3	0.179	0.589
25x5	0.299	1.081
25x6	0.359	1.177
25x8	0.472	1.57
25x10	0.598	1.962
25x12	0.718	2.355
32x3	0.229	1.754
32x5	0.383	1.256
32x6	0.459	0.507
32x8	0.812	2.009
32x10	0.765	2.512
32x12	1.918	3.014
32x16	1.225	4.019
40x3	0.287	0.942
40x5	0.478	1.57
40x6	0.574	1.884
40x8	0.765	2.512
40x10	0.957	3.14
40x12	1.148	3.768
40x16	1.531	5.024
40x20	1.914	6.28
40x25	2.392	7.85
40x32	2.062	10.048
50x3	0.358	1.177
50x5	0.98	1.962
50x6	0.718	2.355
50x8	0.457	3.14
50x10	1.196	3.925
50x12	1.435	4.71
50x16	1.914	6.28
50x20	2.392	7.85
50x25	2.990	9.812
50x40	4.785	15.7
63x6	0.904	2.267
63x8	1.205	3.966
63x10	1.207	4.945
63x12	1.808	5.934
63x16	2.411	7.912
63x20	3.014	9.891
63x25	3.768	12.363
63x32	4.823	15.825
63x40	6.029	19.782
75x6	1.176	3.532
75x8	1.435	4.71
75x10	1.794	5.887
75x12	2.153	7.065
75x16	2.871	9.42
75x20	3.589	11.775
75x25	4.486	14.718
75x32	5.742	18.84
75x40	7.178	23.5
100x6	1.435	4.71
100x8	1.914	6.28
100x10	2.392	7.85
100x12	2.871	9.42
100x16	3.828	12.56
100x20	4.785	15.7
100x32	7.656	25.12
100x40	9.57	31.4
125x6	1.794	5.887
125x8	2.392	7.85
125x10	2.990	9.182
125x12	3.589	9.775
125x16	4.785	15.7
125x20	5.981	19.825
125x25	7.477	24.531
125x32	9.57	31.4
150x6	2.153	7.065
150x8	2.871	9.42
150x10	3.589	11.775
150x12	4.366	14.13
150x16	5.742	18.84
150x20	7.178	23.55
150x25	8.972	29.437
150x32	11.484	37.68
150x40	14.356	47.1
200x8	3.828	12.56
200x10	4.785	15.7
200x12	5.742	18.84
200x16	7.656	25.12
200x20	9.57	31.4
200x25	11.963	39.2

M.S.Round

Size	Weight in Kgs. Per Feet	Weight in Kgs. per Mtr.
12	0.271	0.89
16	0.481	1.58
18	0.609	2.00
20	0.753	2.47
22	0.908	2.98
25	1.173	3.85
27*	1.365	4.48
28	1.472	4.83
30	1.692	5.55
32	1.923	6.31
33.5*	2.109	6.92
36	2.435	7.99
40	3.006	9.86
42*	3.314	10.87
45	3.807	12.49
47*	4.152	13.62
50	4.698	15.41
53*	5.280	17.32
56	5.896	19.34
60*	6.768	22.20
63	7.460	24.47
67*	8.439	27.68

M.S.Square

Size	Weight in Kgs. Per Feet	Weight in Kgs. per Mtr.
5x5	0.059	0.196
6x6	0.085	0.283
8x8	0.153	0.502
10x10	0.239	0.785
12x12	0.344	1.130
16x16	0.612	2.009
20x20	0.957	3.140
25x25	1.495	4.906
32x32	2.449	8.038
40x40	3.828	12.560
50x50	5.981	19.617
65x65	10.109	33.160
75x75	13.458	44.156
90x90	19.380	63.585
100x100	23.926	78.5
125x125	37.385	122.656

ISA Angle Tolerance

Leg Length of Angle	Tolerance on Leg Length	Tolerance on Thickness
Up to 65mm	±1.0mm	±0.4mm
Over 65mm to 130mm	±1.5mm	±0.5mm
Over 130mm	±2.0mm	±0.6mm

Conclusion

The ISA weight chart provides essential information on the weight per meter of structural steel angles, helping manufacturers and engineers plan efficiently. By understanding the load-bearing capacity and material requirements, it minimizes waste and optimizes project costs, ensuring effective and safe structural designs.

Need a different structural section? See our Channel Weight Calculator for ISMC channels, or our Flange Weight Calculator for flange weights.

FAQ

What are hot rolled steel equal angles?

Hot rolled steel equal angles, also called RSA (Rolled Steel Angle), are low-carbon steel products with a 90° angle and a fillet radius to minimize stress at the corner. They are widely used in construction, engineering, and various structural applications.

What is an isa angle?

An ISA (Indian Standard Angle) refers to a type of angle section with equal leg lengths. It is commonly used in structural applications, especially for withstanding compressive loads.

What are hot rolled unequal angles?

Hot rolled unequal angles are steel sections with a 90° angle, but the two legs have different widths, forming an L-shaped profile. These sections are commonly used in structural applications, offering versatility in construction projects like frameworks, bridges, and support structures where unequal load distribution is needed.

What is the difference between equal and unequal ISA angles?

Equal angles have two legs of the same length (e.g. ISA 50×50) and are typically used where load is distributed evenly across both faces. Unequal angles have two legs of different lengths (e.g. ISA 75×50) and are used where one face needs more material for strength or connection purposes than the other, such as in asymmetric bracing or where one leg attaches to a thicker member.

What is the HSN code for ISA angle?

ISA steel angles generally fall under HSN code 7216.10 for equal angles under 80mm leg width, or 7216.99 for larger or non-standard profiles. Confirm the exact classification for your specific size and finish with your GST practitioner or customs broker.