Dura 420/4034
EN 1.4034

General characteristics

High-hardness martensitic grade. Corrosion resistant in water and steam. For e.g. professional kitchen knives, top-quality knives, surgical instruments, press plates, brake disks.

Typical applications

  • Professional kitchen knives
  • Top-quality knives
  • Surgical instruments
  • Press plates
  • Brake disks


Product forms, available sizes and finishes


Product typeFinishesThicknessWidth
Cold rolled coil and sheet2B, Work hardened0,80-4,50≤ 1250
Hot rolled coil and plateHot rolled white5,00-7,00≤ 1250
Chemical composition


The chemical composition is given as % by weight.

TypicalDura 420/40340.4513.7
EN 10088-21.40340.43-0.50<112.5-14.5Si:<1 P:<0.040 S:<0.015
Mechanical properties



StandardGradeRp0.2Rp1.0RmElongationImpact strengthRockwellHBHV
Product type: Cold rolled coil and sheet
Typical (thickness 1 mm)Dura 420/403437543066089HRB
Product type: Hot rolled coil and sheet
Typical (thickness 4 mm)Dura 420/40344004806402488

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


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



Physical properties



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




Standards & approvals



EN 10088-21.4034