DIN 17155 HII Steel plate for Boiler Pressure Vessel
HII steel plate,DIN 17155 HII steel plates is a kind of material for boiler and pressure vessel steel. DIN 17155 HII steel plates is characterised by a minimum yield strength of 185 - 265 MPa and by good weldability,so HII steel is mainly used to for manufacturing boilers, pressure vessels and pipes transporting hot liquids.the following are DIN 17155 HII steel plate's Chemical composition and mechanical properties.
| Grade | C. % | Mn.% | S. | N | Cu | Nb | Ti. | Si. | P. | AL | Cr. | Mo. | Ni | Vi |
| HII | 0.20 | 0.80-1.40 | 0.015 | 0.012 | 0.30 | 0.020 | 0.03 | 0.40 | 0.025 | 0.020 | 0.30 | 0.08 | 0.30 | 0.02 |
HII Steel Mechanical properties
| Grade | Type | Thickness mm | Yield strength Mpa(min) | Tensile Strength MPa | Elongation % (min) | Impact Energy (KVJ) (min) | ||
| -20° | 0° | +20 | ||||||
| HII | Normalized | ≤16 16>to≤40 40>to≤60 60>to≤100 100>to≤150 150>to≤250 | 265 | 410-530 | 22 | 27 | 34 | 40 |
| 255 | 410-530 | 22 | 27 | 34 | 40 | |||
| 245 | 410-530 | 22 | 27 | 34 | 40 | |||
| 215 | 410-530 | 22 | 27 | 34 | 40 | |||
| 200 | 400-530 | 22 | 27 | 34 | 40 | |||
| 185 | 390-530 | 22 | 27 | 34 | 40 | |||
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