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3942 Quality Sheet Specification
High, medium strength steels for automotive industry, mostly for discs
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, medium strength steels for automotive industry, mostly for discs
Chemical Composition (%)
| Standard Equivalent | Erdemir Grade No | Cmin. | Cmax. | Mnmin. | Mnmax. | Pmax. | Smax. | Simax. | Almin. | Almax. | Nmax. | Cumax. | CEmax. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | |||||||||||||
| EN 10025-2:2019 | S275JR (Mod) | 3942 | 0.10 | 0.20 | 0.50 | 1.30 | 0.025 | 0.012 | 0.15 | 0.015 | 0.07 | 120.00 | 0.55 | 0.40 |
- 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%. Minimum aluminium to nitrogen ratio is 2:1.
- Carbon equivalent, CEV (IIW) % = C + Mn / 6 + (Cr + Mo + V) / 5 + (Ni + Cu) / 15
- If Cu %: 0.25-0.40, max carbon equivalent (CEV) is increased 0.02 % within the framework of agreements with customers.
- Could be normalized or equivalent to normalized rolling.
Mechanical Properties
| Standard Equivalent | Erdemir Grade No | Re [N/mm2] | Rm [N/mm2] | A(%) min. | Impact | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | ||||||||||
| A5 | 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 | S275JR (Mod) | 3942 | 275 min. | 430-560 | 21 | 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.
- This grade is produced according to reference mechanical values above in line with agreements with customers.