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3281 Quality Sheet Specification
Low and intermediate strength, atmospheric corrosion resistant structural steels
Reproducible Letter Symbols --> HRP --> HRPKK --> HRU --> HRUKK --> KRKK --> L --> LKK --> LP --> LPKK --> LR --> LRKK --> R --> RD --> RKK --> RP --> RPD --> RPKK --> THRU --> TR --> TRKK --> TR
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.
Low and intermediate strength, atmospheric corrosion resistant structural steels
Chemical Composition (%)
| Standard Equivalent | Erdemir Grade No | Cmax. | Mnmax. | Pmax. | Smax. | Simin. | Simax. | Nmax. | Cumax. | CEmax. | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | ||||||||||
| EN 10025-2:2019 | S235JR+AR CTB (Cu) | 3281 | 0.17 | 1.40 | 0.035 | 0.035 | 0.14 | 0.25 | 120.00 | 0.55 | 0.35 |
- Titanium may be added depending on the results of production.
- If Cu %: 0.25-0.40, max carbon equivalent (CEV) is increased 0.02 % within the framework of agreements with customers.
- The maximum value for nitrogen does not apply if the chemical composition shows a minimum total aluminium content of 0.020%.
- Category A contains Si ≤ 0.030% ve Si+2.5P ≤ 0.090%, Category B contains Si 0.14≤ Si ≤0.25%, Category D contains Si 0.25< Si ≤0.35%.
- Carbon equivalent, CEV (IIW) % = C + Mn / 6 + (Cr + Mo + V) / 5 + (Ni + Cu) / 15
- Suitable for galvanizing as "Category B". Category B contains Si 0.14≤ Si ≤0.25%.
Mechanical Properties
| Standard Equivalent | Erdemir Grade No | Re [N/mm2] t(thickness, mm) | Rm [N/mm2] | A(%) min. t(thickness, mm) | Impact | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | |||||||||||||||
| 1.5≤t≤16 | 16.01≤t≤25 | A801.5≤t≤1.5 | A801.51≤t≤2 | A802.01≤t≤2.5 | A802.51≤t≤2.99 | A53≤t≤25 | 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≤25 | KVC J min.10≤t≤25 | ||||
| EN 10025-2:2019 | S235JR+AR CTB (Cu) | 3281 | 235 min. | 225 min. | 360-510 | 16 | 17 | 18 | 19 | 24 | 20 | 14 | 20 | 21 | 20 | 27 |
- Tensile test values apply to "transverse" test pieces
- The impact test is carried out only when specified at the time of enquiry and order and is not carried out for thickness thinner than 6 mm.