NPI Beams (IPN)
NPI (IPN) profiles are classic European I beams with 14% tapered flanges. Their narrower, thicker flanges make them the choice for machinery building, crane rails, track applications and traditional structural details. We supply from stock per DIN 1025-1 dimensions and EN 10024 tolerances.
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NPI (IPN) Dimensions and Section Properties
| Section | h (mm) | b (mm) | tw (mm) | tf (mm) | Area A (cm²) | Weight (kg/m) | Iy (cm⁴) | Wy (cm³) | Iz (cm⁴) | Wz (cm³) |
|---|---|---|---|---|---|---|---|---|---|---|
| NPI 80 | 80 | 42 | 3,9 | 5,9 | 7,6 | 5,9 | 77,80 | 19,50 | 6,290 | 3,000 |
| NPI 100 | 100 | 50 | 4,5 | 6,8 | 10,6 | 8,3 | 171,0 | 34,20 | 12,20 | 4,880 |
| NPI 120 | 120 | 58 | 5,1 | 7,7 | 14,2 | 11,1 | 328,0 | 54,70 | 21,50 | 7,410 |
| NPI 140 | 140 | 66 | 5,7 | 8,6 | 18,2 | 14,3 | 573,0 | 81,90 | 35,20 | 10,70 |
| NPI 160 | 160 | 74 | 6,3 | 9,5 | 22,8 | 17,9 | 935,0 | 117,0 | 54,70 | 14,80 |
| NPI 180 | 180 | 82 | 6,9 | 10,4 | 27,9 | 21,9 | 1.450 | 161,0 | 81,30 | 19,80 |
| NPI 200 | 200 | 90 | 7,5 | 11,3 | 33,4 | 26,2 | 2.140 | 214,0 | 117,0 | 26,00 |
| NPI 220 | 220 | 98 | 8,1 | 12,2 | 39,5 | 31,1 | 3.060 | 278,0 | 162,0 | 33,10 |
| NPI 240 | 240 | 106 | 8,7 | 13,1 | 46,1 | 36,2 | 4.250 | 354,0 | 221,0 | 41,70 |
| NPI 260 | 260 | 113 | 9,4 | 14,1 | 53,3 | 41,9 | 5.740 | 442,0 | 288,0 | 51,00 |
| NPI 280 | 280 | 119 | 10,1 | 15,2 | 61 | 47,9 | 7.590 | 542,0 | 364,0 | 61,20 |
| NPI 300 | 300 | 125 | 10,8 | 16,2 | 69 | 54,2 | 9.800 | 653,0 | 451,0 | 72,20 |
| NPI 320 | 320 | 131 | 11,5 | 17,3 | 77,7 | 61 | 12.510 | 782,0 | 555,0 | 84,70 |
| NPI 340 | 340 | 137 | 12,2 | 18,3 | 86,7 | 68 | 15.700 | 923,0 | 674,0 | 98,40 |
| NPI 360 | 360 | 143 | 13,0 | 19,5 | 97 | 76,1 | 19.610 | 1.090 | 818,0 | 114,0 |
| NPI 380 | 380 | 149 | 13,7 | 20,5 | 107 | 84 | 24.010 | 1.260 | 975,0 | 131,0 |
| NPI 400 | 400 | 155 | 14,4 | 21,6 | 117,7 | 92,4 | 29.210 | 1.460 | 1.160 | 149,0 |
| NPI 450 | 450 | 170 | 16,2 | 24,3 | 146,9 | 115 | 45.850 | 2.040 | 1.730 | 203,0 |
| NPI 500 | 500 | 185 | 18,0 | 27,0 | 179,4 | 141 | 68.740 | 2.750 | 2.480 | 268,0 |
| NPI 550 | 550 | 200 | 19,0 | 30,0 | 212 | 166 | 99.180 | 3.610 | 3.490 | 349,0 |
| NPI 600 | 600 | 215 | 21,6 | 32,4 | 253,7 | 199 | 139.000 | 4.630 | 4.670 | 434,0 |
Dimensions and section properties from the EN 10365 standard tables (ArcelorMittal sales programme). Iy/Wy are strong-axis, Iz/Wz weak-axis values. NPI is the classic tapered-flange I section (DIN 1025-1). Values are for guidance; request a quote for exact dimensions and tolerances.
Applications
Machine framesCrane and monorail runwaysTraditional structural detailsRail and platform applications
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