ERW STEEL TUBES
E.R.W. Black tubes are available in the following size range.
Round : 15 mm N.B. to 150 mm N.B.
Square : 20 x 20 mm to 132 x 132 mm
Rectangle: 25 x 15 mm to 200 x 60 mm
Erw steel tubes for ordinary uses in water, gas and air lines conforming to is 1239 (part-1) : 2004
N.B AND SERIES OUTSIDE DIAMETER WALL THICKNESS  NORMAL WEIGHT BLACK TUBES NORMAL WEIGHT GALVANIZED TUBES  SOCKETS
PLAIN END   SCREWED & SOCKETED PLAIN END   SCREWED & SOCKETED MIN. OD. MIN LENGTH
MM   MINIMUM MAXIMUM MM SWG KG/M M/ TONE KG/M M/TONE KG/M M/TONE KG/M M/TONE MM MM
15 L 21.0 21.4 2.00 14 0.947 1056 0.956 1046 0.947 1056 0.956 1046 27.0 37.0
M 21.0 21.8 2.60 12 1.21 826 1.22 819 1.21 826 1.22 819
H 21.0 21.8 3.20 10 1.44 694 1.45 689 1.44 694 1.45 689
20 L 26.4 26.9 2.30 13 1.38 724 1.39 719 1.38 724 1.39 719 32.5 39.0
M 26.5 27.3 2.60 12 1.56 641 1.57 637 1.56 641 1.57 637
H 26.5 27.3 3.20 10 1.87 534 1.88 532 1.87 534 1.88 532
25 L 33.2 33.8 2.60 12 1.98 505 2.0 500 1.98 505 2.0 500 39.5 46.0
M 33.3 34.2 3.20 10 2.41 415 2.43 411 2.41 415 2.43 411
H 33.3 34.2 4.00 8 2.93 341 2.95 339 2.93 341 2.95 339
32 L 41.9 42.5 2.60 12 2.54 393 2.57 389 2.54 393 2.57 389 49.0 51.0
M 42.0 42.9 3.20 10 3.10 322 3.13 319 3.10 322 3.13 319
H 42.0 42.9 4.00 8 3.79 264 3.82 261 3.79 264 3.82 261
40 L 47.8 48.4 2.90 11 3.23 309 3.27 306 3.23 309 3.27 306 56.0 51.0
M 47.9 48.8 3.20 10 3.56 281 3.60 277 3.56 281 3.60 277
H 47.9 48.8 4.00 8 4.37 229 4.41 226 4.37 229 4.41 226
50 L 59.6 60.2 2.90 11 4.08 245 4.15 241 4.08 245 4.15 241 68.0 60.0
M 59.7 60.8 3.60 9 5.03 199 5.10 196 5.03 199 5.10 196
H 59.7 60.8 4.50 7 6.19 161 6.26 159 6.19 161 6.26 159
65 L 75.2 76.0 3.20 10 5.71 175 5.83 171 5.71 175 5.83 171 84.0 69.0
M 75.3 76.6 3.60 9 6.42 155 6.54 153 6.42 155 6.54 153
H 75.3 76.6 4.50 7 7.93 126 8.05 124 7.93 126 8.05 124
80 L 87.9 88.7 3.20 10 6.72 149 6.89 145 6.72 149 6.89 145 98.0 75.0
M 88.0 89.5 4.00 8 8.36 119 8.53 117 8.36 119 8.53 117
H 88.0 89.5 4.80 6 9.90 101 10.10 99 9.90 101 10.10 99
100 L 113.0 113.9 3.60 9 9.75 102 10.0 100 9.75 102 10.0 100 124.0 87.0
M 113.1 115.0 4.50 7 12.20 82 12.50 80 12.20 82 12.50 80
H 113.1 115.0 5.40 5 14.50 69 14.80 67 14.50 69 14.80 67
125 M 138.5 140.8 4.80 6 15.90 63 16.40 61 15.90 63 16.40 61 151.0 96.0
H 138.5 140.8 5.40 5 17.9 56 18.40 54 17.9 56 18.40 54
150 M 163.9 166.5 4.80 6 18.90 53 19.50 51 18.90 53 19.50 51 178.0 96.0
H 163.9 166.5 5.40 5 21.3 47 21.90 45 21.3 47 21.9 45
 
TOLERANCES
A. Thickness
1.  Light Tubes + not limited
  -  8%
2.  Medium and  + not limited
Heavy Tubes -  10%
B. weight
1. Single Tube +  10%
(Light Series) -  8%
   
2. Single Tubes +  10%
(Medium and Heavy Series) -   10%
   
3. For quantities per  +  7.5%
Load of 10 Tonnes minimum   -   5%
(Light series)     
   
4.For quantities per load  +  7.5%
 Of 10 tonnes minimum -   7.5%
(Medium and Heavy Series)  
C. Length
 Unless otherwise specified  4 to 7 meters.
 
STEEL TUBES FOR STRUCTURAL PURPOSES CONFORMING TO IS 1161 :1998
Grade Yst 210 , Yst 240, Yst 310
N.B. and  series OUT SIDE DIAMETER THICKNESS NORMAL WEIGHT BLACK TUBES PLAIN END CALCUATED NORMAL WEIGHT GALVANIZED TUBES PLAIN END
MM   MM MM KG/M M/TONE KG/M M/TONE
15 L 21.3 2.0 0.947 1056 1.00 1003
M 2.6 1.21 826 1.26 794
H 3.2 1.44 694 1.49 671
20 L 26.9 2.3 1.38 725 1.43 699
M 2.6 1.56 641 1.61 621
H 3.2 1.87 535 1.92 521
25 L 33.7 2.6 1.98 505 2.03 493
M 3.2 2.41 415 2.46 407
H 4.0 2.93 341 2.98 336
32 L 42.4 2.6 2.54 394 2.62 382
M 3.2 3.10 323 3.18 314
H 4.0 3.79 264 3.87 258
40 L 48.3 2.9 3.23 310 3.34 299
M 3.2 3.56 281 3.67 272
H 4.0 4.37 229 4.48 236
50 L 60.3 2.9 4.08 245 4.20 238
M 3.6 5.03 199 5.15 194
H 4.5 6.19 162 6.31 158
65 L 76.1 3.2 5.71 175 5.86 171
M 3.6 6.42 156 6.57 152
H 4.5 7.93 126 8.10 123
80 L 88.9 3.2 6.72 149 6.90 145
M 4.0 8.36 120 8.54 117
H 4.8 9.90 101 10.08 99
90 L 101.6 3.6 8.70 115 8.97 111
M 4.0 9.63 144 7.20 139
H 4.8 11.50 87 11.77 85
100 L 114.3 3.6 9.75 103 9.97 100
M 4.5 12.20 82 12.42 81
H 5.4 14.50 69 14.72 68
110 L 127.0 4.5 13.60 74 13.90 72
M 4.8 14.50 69 14.80 68
H 5.4 16.20 62 14.80 61
125 L 139.7 4.5 15.00 67 15.25 66
M 4.8 15.90 63 16.15 62
H 5.4 17.90 56 18.15 55
135 L 152.4 4.5 16.40 61 16.78 60
M 4.8 17.50 57 17.88 56
H 5.4 19.60 51 19.98 55
150 L 165.1 4.5 17.80 56 18.20 55
M 4.8 18.90 53 19.30 52
H 5.4 21.30 47 21.70 46
150 L 168.3 4.5 18.2 55 18.66 54
M 4.8 19.4 52 19.88 50
H 5.4 21.7 46 22.24 45
  6.3 25.2 40 41.00 24
 
TOLERANCES
SECTION TYPE  GRADE OUT SIDE DIMENSION THICKNESS SQUARE NESS CORNER RADIUS WEIGHT INDIVIDUAL LENGTHS WEIGHT ON LOT OF 10 MT CUSTOMIZED OFFER
RHS/SHS IS 4923 Yst- 210  +-1%with a minimum of +-0.50 mm +-10% 90 deg  3t max -8%,+10% +-7.5% Length-4 M to12 M Thickness-1.4 MM to 8.0 MM
Yst- 240           
Yst- 310    +-2 deg.      
CHS       IS-1161 Yst- 210  OD upto and incl48.3+0.4/- 0.8 mm;over 48.3+-1% +no limited NA NA L+10% -8%   L+-5%
Yst- 240  -10%    
Yst- 310       M & H+-10%  M & H +-7.5%
       
ERW STEEL TUBES FOR MECHANICAL &GENERAL ENGINEERING PURPOSE IS 3601 :2006
Dimensions and design properties of steel tubes Grade WT 160 &210 &WT 240
OUTSIDE DIAMETER MM 1 Thick mm2 Mass kg/m 3 Area of cross section  m 4 Moment of inertia cm 5 MODAL OF SECTION CM 6 REDIUS OF GYRATION CM 7
21.3 1.8 0.866 1.10 0.53 0.50 0.69
2.0 0.952 1.21 0.57 0.54 0.69
2.6 1.20 1.53 0.68 0.64 0.67
3.2 1.43 1.82 0.77 0.72 0.65
26.9 1.8 1.11 1.42 1.12 0.83 0.89
2.0 1.23 1.56 1.22 0.91 0.88
2.3 1.40 1.78 1.36 1.01 0.87
2.6 1.56 1.98 1.48 1.10 0.86
3.2 1.87 2.38 1.70 1.27 0.85
33.7 2.0 1.56 1.99 2.51 1.49 1.12
2.3 1.78 2.27 2.81 1.67 1.11
2.6 1.99 2.54 3.09 1.84 1.10
3.2 2.41 3.07 3.60 2.14 1.08
4.0 2.93 3.73 4.19 2.49 1.06
42.4 2.3 2.27 2.90 5.85 2.76 1.42
2.6 2.55 3.25 6.46 3.05 1.41
3.2 3.09 3.94 7.62 3.59 1.39
3.6 3.44 4.39 8.33 3.93 1.38
4.0 3.79 4.83 8.90 4.24 1.36
48.3 2.3 2.61 3.32 8.80 3.64 1.63
2.6 2.93 3.73 9.77 4.05 1.62
2.9 3.25 4.14 10.70 4.43 1.61
3.2 3.56 4.53 11.59 4.80 1.60
3.6 3.97 5.05 12.69 5.25 1.59
4.0 4.37 5.57 13.77 5.70 1.57
60.3 2.3 3.29 4.19 17.65 5.85 2.05
2.6 3.70 4.71 19.64 6.51 2.04
2.9 4.11 5.23 21.59 7.16 2.03
3.2 4.51 5.74 23.47 7.78 2.02
3.6 5.03 6.41 25.87 8.58 2.01
4.0 5.55 7.07 28.15 9.34 2.00
4.5 6.19 7.89 30.90 10.20 1.98
76.1 2.6 5.24 6.00 40.57 10.66 2.60
2.9 5.75 6.67 44.74 11.76 2.59
3.2 6.44 7.33 48.78 12.80 2.58
3.6 7.11 8.20 54.01 14.20 2.57
4.5 7.95 10.10 65.12 17.10 2.54
5.0 8.77 11.16 70.87 18.63 2.52
88.9 2.9 6.15 7.83 72.47 16.30 3.04
3.2 6.76 8.62 79.21 17.80 3.03
4.0 8.38 10.70 96.34 21.70 3.00
5.0 10.30 13.20 116.40 26.20 2.97
5.4 11.10 14.00 123.80 27.80 2.97
5.6 11.50 14.65 127.64 28.72 2.95
101.6 3.6 8.70 11.10 133.20 26.20 3.47
4.0 9.63 12.30 146.20 28.80 3.45
5.0 11.90 15.20 177.50 34.90 3.42
114.3 3.2 8.77 11.16 172.33 30.15 3.93
3.6 9.83 12.50 192.00 33.60 3.92
4.5 12.20 15.50 234.30 41.00 3.89
5.4 14.50 18.50 274.50 48.00 3.86
6.3 16.80 21.20 315.00 55.10 3.83
139.7 3.60 12.10 15.38 356.36 51.02 4.81
4.00 13.40 17.04 392.57 56.20 4.80
4.50 15.00 19.10 437.20 62.60 4.78
5.00 16.60 21.20 480.50 68.80 4.77
5.40 17.90 22.80 514.50 73.70 4.75
6.30 20.70 26.30 591.00 84.70 4.73
152.4 4.50 16.40 20.90 572.20 75.10 5.23
5.00 18.20 23.20 629.50 82.60 5.21
5.40 19.60 24.90 674.50 88.50 5.20
165.1 4.50 17.80 22.70 732.60 88.70 5.68
5.00 19.70 25.10 806.60 97.70 5.66
5.40 21.20 27.10 864.70 105.00 5.65
6.30 24.80 31.40 992.00 120.00 5.63
168.3 4.00 16.20 20.64 696.87 82.81 5.81
4.50 18.20 23.20 777.20 98.40 5.79
5.00 20.10 25.70 855.80 102.00 5.78
5.40 21.70 27.60 917.70 109.00 5.76
6.30 25.20 32.10 1053.00 125.00 5.73
7.10 28.20 35.94 1169.66 139.00 5.70
8.00 31.60 39.70 1288.00 153.00 5.69
 
A-PHYSICAL PROPERTIES
Grade Y.S.   T.S   % age Elongation (Min.)
As welded (less then Or equal to 33.7 mm OD As welded (more then Or equal to 33.7 mm OD
Mpa (min)  Mpa (min)
WT 160 160 310 15 22
WT 210 210 330 12 20
WT 240 240 410 10 15
WT 310 310 450 6 10
B-MANUFACTURING TOLERANCE
Over mm  Up to & including mm Tolerance on outside Diameter mm
-   25.4 +-0.15
25.4   51.0 +-0.18
51.0   63.5 +-0.25
63.5   76.1 +-0.25
76.1   88.9 +-0.31
88.9   101.6 +-0.36
101.6   114.3 +-0.43
114.3   152.4 +-0.58
152.4   168.3 +-0.65
168.3   - +-0.75
NOTE: The tolerance of thickness excluding the weld shall be +- 10%
STEEL HOLLOW SECTIONS FOR STRUCTURAL USE (SHS)
Dimensions and depth properties of square hollow sections IS 4923:1997 GRADE Yst 210, Yst 240, Yst 310
SHS  DEPTH  WIDTH THICKNESS WEIGHT AREA  MOMENT OF RADIUS OF  ELASTIC  PLASTIC 
DXD  D  D OF SECTION  INERTIA GYRATION MODULUS MODULUS
MM MM MM MM KG/M CM 2 CM 4 CM CM 3 CM 3
1 2 3 4 5 6 7 8 9 10
20.0x20.0 20.0 20.0 2.0 1.15 1.33 0.58 0.68 0.61 0.61
20.0 20.0 2.6 1.46 2.17 0.63 0.66 0.66 0.66
25.0x25.0 25.0 25.0 2.6 1.69 2.16 1.72 0.89 1.38 1.76
25.0 25.0 3.2 1.98 2.53 1.89 0.86 1.51 1.98
32.0x32.0 32.0 32.0 2.6 2.26 2.88 4.02 1.18 2.51 3.11
32.0 32.0 3.2 2.69 3.42 4.54 1.15 2.84 3.59
32.0 32.0 4.0 3.19 4.07 5.02 1.11 3.14 4.11
40.0x40.0 40.0 40.0 2.6 2.92 3.72 8.45 1.51 4.22 5.12
40.0 40.0 3.2 3.49 4.45 9.72 1.48 4.86 6.01
40.0 40.0 3.6 3.85 4.91 10.45 1.46 5.22 6.53
40.0 40.0 4.0 4.20 5.35 11.07 1.44 5.54 7.01
50.0x50.0 50.0 50 2.9 4.07 5.19 18.37 1.88 7.42 8.93
50.0 50 3.6 4.93 6.28 21.42 1.85 8.66 10.60
50.0 50 4.5 5.95 7.58 24.64 1.80 9.96 12.47
60.0x60.0 60.0 60.0 2.6 4.55 5.8 31.33 2.33 10.44 13.35
60.0 60.0 3.6 6.11 7.79 40.37 2.28 13.46 16.22
60.0 60.0 4.5 7.43 9.47 47.20 2.23 15.73 19.32
72.0x72.0 72.0 72.0 3.2 6.71 8.54 66.32 2.79 18.42 21.80
72.0 72.0 4.0 8.22 10.47 79.03 2.75 21.95 26.32
72.0 72.0 4.8 9.66 12.31 90.31 2.71 25.09 30.49
80.0x80.0 80.0 80.0 3.2 7.51 9.57 92.71 3.11 27.29 27.92
80.0 80.0 4.0 9.22 11.75 111.05 3.07 27.76 33.07
80.0 80.0 4.8 11.03 13.85 127.58 3.04 31.90 38.45
91.5x91.5 91.5 91.5 3.6 9.67 12.32 156.49 3.56 34.21 40.24
91.5 91.5 4.5 11.88 15.14 187.57 3.52 41.00 48.79
91.5 91.5 5.4 14.01 17.85 215.68 3.48 47.14 56.77
100.0x100.0 100.0 100.0 4.0 11.73 14.95 226.35 3.89 45.27 53.30
100.0 100.0 5.0 14.41 18.36 271.10 3.84 54.22 64.59
100.0 100.0 6.0 16.98 21.63 311.47 3.79 62.29 75.10
113.5x113.5 113.5 113.5 4.5 14.99 19.10 372.88 4.42 65.71 77.33
113.5 113.5 4.8 15.92 20.28 393.31 4.40 69.30 81.81
113.5 113.5 5.4 17.74 22.60 432.58 4.38 76.23 90.55
113.5 113.5 6.0 19.53 24.87 469.81 4.35 82.79 98.96
132.0x132.0 132.0 132.0 4.8 18.71 23.83 634.39 5.16 96.12 112.69
132.0 132.0 5.4 20.88 26.59 700.11 5.13 106.08 125.02
132.0 132.0 6.0 23.01 29.31 762.98 5.10 115.60 136.98
Apart from above mentioned size, We also manufacture customized and need based requirement.
STEEL HOLLOW SECTIONS FOR STRUCTURAL USE (RHS)
Dimensions and depth properties of Rectangular Hollow sections IS 4923:1997 GRADE Yst 210,Yst 240,Yst 310
RHS  DEPTH  WIDTH THICKNESS WEIGHT AREA  MOMENT OF  INERTIA RADIUS OF  GYRATION ELASTIC  MODULUS PLASTIC  MODULUS
DXB  D  D OF SECTION ABOUT ABOUT ABOUT ABOUT
            X-X Y-Y X-X Y-Y X-X Y-Y X-X Y-Y
MM MM MM MM KG/M CM2 CM4 CM CM3 CM3
1 2 3 4 5 6 7 8 9 10 11 12 13 14
50.0x25.0 50 25 2.9 2.98 3.80 10.93 3.60 1.70 0.97 4.37 2.88 5.72 3.48
50 25 3.2 3.24 4.13 11.63 3.80 1.68 0.95 4.65 3.04 6.14 3.73
60.0x40.0 60 40 2.9 4.12 5.25 24.74 13.11 2.17 1.58 8.25 6.56 10.25 7.73
66.0x33.0 66 33 2.9 4.07 5.19 27.33 9.12 2.29 1.33 8.26 5.53 10.59 6.49
66 33 3.6 4.93 6.28 31.87 10.52 2.25 1.29 9.66 6.37 12.56 7.66
66 33 4.5 5.95 7.58 36.64 11.93 2.20 1.25 11.10 7.23 14.77 8.94
75.0x25.0 75 25 2.9 4.12 5.25 29.82 7.72 2.38 1.21 8.52 5.14 11.07 6.04
75 25 3.2 4.50 5.73 32.04 8.24 2.37 1.20 9.15 5.49 11.98 6.51
75 25 4.0 5.45 6.95 37.23 9.42 2.31 116 10.64 6.28 14.20 7.66
80.0x40.0 80 40 2.9 5.03 6.41 50.87 17.11 2.82 1.63 12.72 8.56 16.07 9.88
80 40 3.2 5.50 7.01 54.94 18.41 2.80 1.62 13.74 9.21 17.46 10.72
80 40 4.0 6.71 8.55 64.79 21.49 2.75 1.59 16.20 10.74 20.91 12.77
96.0x48.0 96 48 3.2 6.71 8.54 98.61 33.28 3.40 1.97 20.54 13.87 25.85 15.91
96 48 4.0 8.22 10.47 117.54 39.32 3.50 1.94 24.49 16.30 31.21 19.14
96 48 4.8 9.66 12.31 134.35 44.55 3.30 1.90 27.99 18.56 36.13 22.08
100.0x50.0 100 50 3.2 7.01 8.93 112.29 37.95 3.60 2.06 22.46 15.18 28.20 17.37
100 50 4.0 8.59 10.95 134.14 44.95 3.50 2.03 26.83 17.98 34.10 20.93
122.0x61.0 122 61 3.6 9.67 12.32 232.61 78.83 4.34 2.35 38.13 25.84 47.71 29.42
122 61 4.5 11.88 15.14 278.94 93.78 4.29 2.49 45.73 30.75 57.85 35.56
122 61 5.4 14.01 17.85 320.83 107.03 4.24 2.45 52.60 35.09 67.29 41.22
NOTE:- Size other then specified above may be supplied as per customer requirement 
 
  T.S.(MIN) Y.S.(MIN) % ELONGATION 
GRADE  M Pa M Pa 25.4 MM OVER 
          & UNDER  25.4 MM
Yst – 210 330 210 12 20
Yst – 240 410 240 10 15
Yst – 310 450 310 8 10
 
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