Core 4513
EN 1.4513

General characteristics

Core 4513 is a 1% molybdenum-alloyed ferritic stainless steel with medium chromium content. It is suitable for use in many corrosive environments, like for instance in the cold end of automotive exhaust systems. Because of its titanium alloying, Core 4513 can be welded in all dimensions without becoming susceptible to intergranular corrosion.

Typical applications

  • Automotive exhaust systems & mufflers
  • Decorative trim in automotive applications


Product forms, available sizes and finishes


Product typeFinishesThicknessWidth
Black hot band1U3,50-8,001000-1550
Cold rolled coil2B, 2BB, 2C, 2D, 2E, 2G, 2J, 2R0,05-3,003-1550
Cold rolled sheet2B, 2BB, 2D, 2E, 2G, 2J, 2R0,30-3,00350-1530
Hot rolled coil, pickled1C, 1D, 1G, 1U2,00-8,0050-1550
Precision strip2R0,05-1,503-649
Chemical composition


The typical chemical composition for this grade is given in the table below, together with composition limits given for the product according to different standards. The required standard will be fully met as specified on the order.

The chemical composition is given as % by mass.

Typical 0.0217.01.0Ti
EN 10088-2 ≤0.025≤1.016.0-18.00.80-1.40≤0.020Ti
Mechanical properties



StandardRp0.2Rp1.0RmElongationImpact strengthRockwellHBHV
Product type: Cold rolled coil and sheet
Typical (thickness 1 mm)310325470
Product type: Hot rolled coil and sheet
Typical (thickness 4 mm)3553804903478

1)Elongation according to EN standard:
A80 for thickness below 3 mm.
A for thickness = 3 mm.
Elongation according to ASTM standard A2” or A50.

Corrosion resistance

Core 4513 has good corrosion resistance in solutions of many halogen-free organic and inorganic compounds over a wide temperature and concentration range. It can withstand many sufficiently diluted organic and mineral acids depending on the temperature and concentration of the solution. Core 4513 may suffer from uniform corrosion in strong organic and mineral acids, as well as in hot concentrated alkaline solutions.

In aqueous solutions containing halogenides, e.g. chlorides or bromides, pitting and crevice corrosion may occur depending on the halogenide concentration, temperature, pH-value, concentration of oxidizing compounds, or crevice geometry, if applicable. The presence of corrosion-inhibiting or accelerating compounds like e.g. transition metal ions or organic compounds may influence the corrosion behavior of Core 4513. Due to its ferritic crystal structure, Core 4513 is not prone to chloride-induced stress corrosion cracking.

Core 4513 can be used for indoor and outdoor applications in rural areas and urban environments where chloride contamination is low. The best material performance is usually reached with the help of adequate design, correct post-weld treatment, and regular cleaning during use (if applicable).

Due to its titanium and niobium content, the risk of senzitisation to intergranular corrosion is strongly reduced when compared to non-stabilized ferritic grades. Core 4513 can be used in the temperature range in which chromium carbides would precipitate in non-stabilized ferritic grades. Its maximum service temperature in dry air is 850 °C. The presence of other corrosive compounds in the hot environment, like water or sulfur compounds may reduce the maximum service temperature significantly.

Pitting corrosion resistanceCrevice corrosion resistance

PRE Pitting Resistant Equivalent calculated using the formula: PRE = %Cr + 3.3 x %Mo + 16 x %N
CPT Corrosion Pitting Temperature as measured in the Avesta Cell (ASTM G 150), in a 1M NaCl solution (35,000 ppm or mg/l chloride ions).
CCT Critical Crevice Corrosion Temperature is the critical crevice corrosion temperature which is obtained by laboratory tests according to ASTM G 48 Method F


For more information on corrosion resistance, please refer to the Outokumpu Corrosion Handbook or contact the our corrosion experts.

Physical properties



DensityModulus of elasticityThermal exp. at 100 °CThermal conductivityThermal capacityElectrical resistanceMagnetizable


More detailed information concerning welding procedures can be obtained from the Outokumpu Welding Handbook, available from our sales offices.

Standards & approvals



EN 10088-21.4513