Dura 420/4031
EN 1.4031

General characteristics

Martensitic grade with medium-high hardness . Corrosion resistant in water and steam. Applied for cutting utensils, surgical instruments, measuring tools, mechanical parts subject to wear.

Typical applications

  • Cutting utensils
  • Surgical instruments
  • Measuring tools
  • Mechanical parts subject to wear

 

Product forms, available sizes and finishes

Flat

Product typeFinishesThicknessWidth
Black hot band1U4,50-8,001000-1599
Cold rolled coil2B, 2BB, 2C, 2D, 2E, 2G, 2H, 2J, 2R0,05-5,003-1350
Cold rolled sheet2B, 2BB, 2D, 2E, 2G, 2H, 2J0,50-3,50350-1350
Hot rolled coil, pickled1C, 1D, 1U5,00-8,0030-1350
Precision strip2R0,05-1,503-649
Chemical composition

 

The chemical composition is given as % by weight.

CMnCrNiMoNOther
Typical 0.3813.5
EN 10088-2 0.36-0.42≤1.012.5-14.5
EN 10088-3 0.36-0.42≤1.012.5-14.5
Mechanical properties

 

 

StandardRp0.2Rp1.0RmElongationImpact strengthRockwellHBHV
 MPaMPaMPa%J
Product type: Cold rolled coil and sheet
EN 10088-2 ≤ 760 ≥ 12
Product type: Hot rolled coil and sheet
EN 10088-2 ≤ 760 ≥ 12

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
PRECPTCCT
14<10<0

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
kg/dm3GPa10-6/°CW/m°CJ/kg°CµΩm
7,721510,5304600,55Yes
Fabrication

 

 

Standards & approvals

 

 

StandardDesignation
EN 10088-21.4031
EN 10088-31.4031