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6704 Quality Sheet Specification
Medium-strength steels for shipbuilding
Reproducible Letter Symbols --> HRUKK --> KRKK --> L --> LKK --> LRKK --> RKK
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.
Medium-strength steels for shipbuilding
Chemical Composition (%)
| Standard Equivalent | Erdemir Grade No | Cmax. | Mnmin. | Pmax. | Smax. | Simin. | Simax. | Almin. | |
|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | ||||||||
| ABS-P2-2022 | D | 6704 | 0.21 | 0.60 | 0.035 | 0.035 | 0.10 | 0.35 | 0.02 |
- Where the content of soluble aluminum is not less than 0.015%, the minimum required silicon content does not apply.
Mechanical Properties
| Standard Equivalent | Erdemir Grade No | Re [N/mm2] t(thickness, mm) | Rm [N/mm2] | A(%) min. t(thickness, mm) | Impact | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | ||||||||||||||||
| 2.1≤t≤16 | 16.01≤t≤26 | A2002.1≤t≤5 | A2005.01≤t≤10 | A20010.01≤t≤15 | A20015.01≤t≤20 | A20020.01≤t≤25 | A20025.01≤t≤26 | Temperature ( ° C)6≤t≤7.49 | KVC J min.6≤t≤7.49 | Temperature ( ° C)7.5≤t≤9.99 | KVC J min.7.5≤t≤9.99 | Temperature ( ° C)10≤t≤26 | KVC J min.10≤t≤26 | ||||
| ABS-P2-2022 | D | 6704 | 235 min. | 235 min. | 400-520 | 14 | 16 | 17 | 18 | 19 | 20 | -20 | 18 | -20 | 23 | -20 | 27 |
- Tensile test values apply to "transverse" test pieces
- Impact energy values for "full size" (10 X 10 mm) test specimens for thinner products, impact energy values decreases depending on the thickness.
- Impact test is not carried out for thickness thinner than 6 mm.
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.
Medium-strength steels for shipbuilding
Chemical Composition (%)
| Standard Equivalent | Erdemir Grade No | Cmax. | Mnmin. | Pmax. | Smax. | Simin. | Simax. | Almin. | |
|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | ||||||||
| ABS-P2-2022 | D | 6704 | 0.21 | 0.60 | 0.035 | 0.035 | 0.10 | 0.35 | 0.02 |
- Where the content of soluble aluminum is not less than 0.015%, the minimum required silicon content does not apply.
Mechanical Properties
| Standard Equivalent | Erdemir Grade No | Re [N/mm2] t(thickness, mm) | Rm [N/mm2] | A(%) min. t(thickness, mm) | Impact | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | |||||||||||||||||||
| 6≤t≤16 | 16.01≤t≤60 | A2006≤t≤10 | A20010.01≤t≤15 | A20015.01≤t≤20 | A20020.01≤t≤25 | A20025.01≤t≤30 | A20030.01≤t≤40 | A20040.01≤t≤60 | Temperature ( ° C)6≤t≤7.49 | KVC J min.6≤t≤7.49 | Temperature ( ° C)7.5≤t≤9.99 | KVC J min.7.5≤t≤9.99 | Temperature ( ° C)10≤t≤50 | KVC J min.10≤t≤50 | Temperature ( ° C)50.01≤t≤60 | KVC J min.50.01≤t≤60 | ||||
| ABS-P2-2022 | D | 6704 | 235 min. | 235 min. | 400-520 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | -20 | 18 | -20 | 23 | -20 | 27 | -20 | 34 |
- Tensile test values apply to "transverse" test pieces
- Impact energy values for "full size" (10 X 10 mm) test specimens for thinner products, impact energy values decreases depending on the thickness.
- Impact test is not carried out for thickness thinner than 6 mm.