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4842 Quality Sheet Specification
Thermomechanically hot rolled weldable fine-grained structural steels
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.
Thermomechanically hot rolled weldable fine-grained structural steels
Chemical Composition (%)
| Standard Equivalent | Erdemir Grade No | Thickness (mm) | Cmax. | Mnmax. | Pmax. | Smax. | Simax. | Almin. | Nmax. | Crmax. | Momax. | Nimax. | Vmax. | Nbmax. | Timax. | Cumax. | CEmax. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | |||||||||||||||||
| EN 10025-4:2019 | S420M | 4842 | 1≤t≤16 | 0.16 | 1.70 | 0.03 | 0.025 | 0.50 | 0.02 | 250.00 | 0.30 | 0.20 | 0.80 | 0.12 | 0.05 | 0.05 | 0.55 | 0.43 |
| EN 10025-4:2019 | S420M | 4842 | 16.01≤t≤22 | 0.16 | 1.70 | 0.03 | 0.025 | 0.50 | 0.02 | 250.00 | 0.30 | 0.20 | 0.80 | 0.12 | 0.05 | 0.05 | 0.55 | 0.45 |
- The products are supplied in "thermomechanically rolled" condition
- This grade is in development progress and orders are subjected to negotiation.
- Max carbon equivalent (CE) is increased by 0.01 % for Si ≤ 0.25%, and 0.02 % for Si ≤ 0.04 %
- If sufficient nitrogen-binding elements are present, the minimum total aluminium content does not apply.
- Carbon equivalent, CEV (IIW) % = C + Mn / 6 + (Cr + Mo + V) / 5 + (Ni + Cu) / 15
Mechanical Properties
| Standard Equivalent | Erdemir Grade No | Re [N/mm2] t(thickness, mm) | Rm [N/mm2] | A(%) min. t(thickness, mm) | Impact | Bend (Transverse , BMD) t: thickness | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | |||||||||||||
| 2≤t≤16 | 16.01≤t≤22 | A802≤t≤2.99 | A53≤t≤22 | 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≤22 | KVC J min.10≤t≤22 | 180° | ||||
| EN 10025-4:2019 | S420M | 4842 | 420 min. | 400 min. | 520-680 | 19 | 19 | -20 | 20 | -20 | 30 | -20 | 40 | Ø 4d |
- The bending test is carried out only when specified at the time of enquiry and order.
- Tensile test values apply to "transverse" test pieces
- Impact test is not carried out for thickness thinner than 6 mm.
- Bending test is not carried out for thickness greater than 12 mm.