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
Black hot band1U3,00-12,701600-1600
Cold rolled coil2B, 2BB, 2C, 2D, 2E, 2G, 2H, 2J, 2R0,05-5,003-1350
Cold rolled sheet2B, 2BB, 2D, 2E, 2G, 2H, 2J, 2R0,50-5,00350-1350
Hot rolled coil, pickled1C, 1D, 1U5,00-8,0030-1500
Precision strip2R0,05-1,503-649
Chemical composition


The chemical composition is given as % by weight.

Typical 0.4513.7
EN 10088-2 0.43-0.50≤1.012.5-14.5
EN 10088-3 0.43-0.50≤1.012.5-14.5
Mechanical properties



StandardRp0.2Rp1.0RmElongationImpact strengthRockwellHBHV
Product type: Cold rolled coil and sheet
Typical (thickness 1 mm)375430660
EN 10088-2 ≤ 780 ≥ 12
Product type: Hot rolled coil and sheet
Typical (thickness 4 mm)4004806402488
EN 10088-2 ≤ 780 ≥ 15

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
EN 10088-31.4034