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6850 Quality Sheet Specification
High strength steel for manufacture of boilers, pressure vessels and dam penstocks
Reproducible Letter Symbols --> HRUKK --> KRKK --> L --> LKK --> LRKK --> RKK
AlternativesThere is no alternative to this sheet.
Flat / Hot Rolled
Flat steel products are obtained by heating semi-finished products with a rectangular cross-section (slab), which are produced by the continuous casting method, to a specific temperature and then rolling them, with thicknesses ranging from 1.40 to 25.40 mm and widths ranging from 700 to 2025 mm, produceed as coil or by cutting/slit-coiling flat steel products from coils.
High strength steel for manufacture of boilers, pressure vessels and dam penstocks
Chemical Composition (%)
| Standard Equivalent | Erdemir Grade No | Cmax. | Mnmin. | Mnmax. | Pmax. | Smax. | Simin. | Simax. | Almin. | Crmax. | Momax. | Nimax. | Cumax. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | |||||||||||||
| LR-P2-13 | 490 FG | 6850 | 0.20 | 0.90 | 1.60 | 0.035 | 0.035 | 0.10 | 0.50 | 0.018 | 0.25 | 0.10 | 0.30 | 0.30 |
- Cu + Ni + Cr + Mo ≤ 0.70 %
- Niobium, vanadium or other suitable grain refining elements may be used either in place of or in addition to aluminium.
Mechanical Properties
| Standard Equivalent | Erdemir Grade No | Re [N/mm2] | Rm [N/mm2] | A(%) min. | |
|---|---|---|---|---|---|
| Standard | Quality | ||||
| A5 | |||||
| LR-P2-13 | 490 FG | 6850 | 315 min. | 490-610 | 21 |
- Tensile test values apply to "transverse" test pieces
- The tensile test for proof strength at elevated temperature is carried out on request.
Flat / Plate
Heavy plate products are obtained by rolling semi-finished products with a rectangular cross-section (slab) produced by the continuous casting method to a specific temperature, with thicknesses ranging from 6.00 to 200.00 mm and widths ranging from 1000 to 3600 mm.
High strength steel for manufacture of boilers, pressure vessels and dam penstocks
Chemical Composition (%)
| Standard Equivalent | Erdemir Grade No | Thickness (mm) | Cmax. | Mnmin. | Mnmax. | Pmax. | Smax. | Simin. | Simax. | Almin. | Crmax. | Momax. | Nimax. | Cumax. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | ||||||||||||||
| LR-P2-13 | 490 FG | 6850 | 6≤t≤30 | 0.20 | 0.90 | 1.60 | 0.035 | 0.035 | 0.10 | 0.50 | 0.018 | 0.25 | 0.10 | 0.30 | 0.30 |
| LR-P2-13 | 490 FG | 6850 | 30.01≤t≤60 | 0.22 | 0.90 | 1.60 | 0.035 | 0.035 | 0.10 | 0.50 | 0.018 | 0.25 | 0.10 | 0.30 | 0.30 |
- Cu + Ni + Cr + Mo ≤ 0.70 %
- Niobium, vanadium or other suitable grain refining elements may be used either in place of or in addition to aluminium.
- C = 0.22 % max. for thickness greater than 30 mm,
Mechanical Properties
| Standard Equivalent | Erdemir Grade No | Re [N/mm2] t(thickness, mm) | Rm [N/mm2] | A(%) min. | ||
|---|---|---|---|---|---|---|
| Standard | Quality | |||||
| 6≤t≤40 | 40.01≤t≤60 | A5 | ||||
| LR-P2-13 | 490 FG | 6850 | 315 min. | 305 min. | 490-610 | 21 |
- Tensile test values apply to "transverse" test pieces
- The tensile test for proof strength at elevated temperature is carried out on request.