HRPO (Hot Rolled Pickled and Oiled) and HRSPO (Hot Rolled, Pickled, Skin-passed and Oiled) products are low-carbon steel goods from the hot-rolled flat products category. They are used mainly where flatness and surface finish are not the primary criteria, and offer good strength along with reliable weldability and formability.
Key Characteristics−
- Good surface finish
- Flatness
- Weldability
- High strength-to-weight ratio
- Close dimensional tolerances
Applications−
- Automobiles
- Telecommunications
- Engineering and fabrication
- Aerospace
- Furniture
- Drums and barrels
Specifications & Grades−
| Grades | IS 1079 HR1–HR5 (JIS G 3131 SPHC, SPHD, SPHE); IS 10748 Grade 1–5 (JIS G 3113 SAPH310, 370, 400 & 440); JIS G 3134 SPFH490, 540, 590, 540Y & 590Y; IS 5986 Fe290, 330, 360, 410, 490 & 510 |
|---|---|
| Thickness | 1.60 – 6.00 mm (tolerance: ±0.06 mm for 1.60 – 3.00 mm; ±0.12 mm for 3.01 – 6.00 mm) |
| Width: Cut sheets | 50 – 1600 mm |
| Width: Coils | 40 – 1600 mm |
| Width tolerance | ±0.50 mm for slit edge; +12 mm for mill edge |
| Length | 200 – 4000 mm (tolerance: +1.00 mm for L up to 1000 mm; +2.00 mm for L > 1000 mm) |
| Coil inner diameter | 508 mm |
| Max coil weight | 16 MT (slit edge); 30 MT (mill edge) |
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