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4250 Quality Sheet Specification
High-strength structural steels for manufacture of any kind of machines and machine parts, general construction, road and railway vehicles
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 structural steels for manufacture of any kind of machines and machine parts, general construction, road and railway vehicles
Chemical Composition (%)
| Standard Equivalent | Erdemir Grade No | Cmax. | Mnmax. | Pmax. | Smax. | Simax. | Nmax. | Cumax. | CEmax. | |
|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | |||||||||
| EN 10025-2:2019 | S355JR+AR CTA | 4250 | 0.24 | 1.60 | 0.035 | 0.035 | 0.03 | 120.00 | 0.55 | 0.45 |
- Suitable for galvanizing as "Category A". Category A contains Si ≤ 0.030% and Si+2.5P ≤ 0.090%.
- Max carbon equivalent (CE) is increased by 0.01 % for Si ≤ 0.25%, and 0.02 % for Si ≤ 0.04 %
- The maximum value for nitrogen does not apply if the chemical composition shows a minimum total aluminium content of 0.020%.
- Carbon equivalent, CEV (IIW) % = C + Mn / 6 + (Cr + Mo + V) / 5 + (Ni + Cu) / 15
Mechanical Properties
| Standard Equivalent | Erdemir Grade No | Re [N/mm2] | Rm [N/mm2] t(thickness, mm) | A(%) min. t(thickness, mm) | Impact | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | ||||||||||||||
| 1.8≤t≤2.99 | 3≤t≤20 | A801.8≤t≤2 | A802.01≤t≤2.5 | A802.51≤t≤2.99 | A53≤t≤20 | 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≤20 | KVC J min.10≤t≤20 | ||||
| EN 10025-2:2019 | S355JR+AR CTA | 4250 | 355 min. | 510-680 | 470-630 | 14 | 15 | 16 | 20 | 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.