Dura 4122
EN 1.4122

General characteristics

Outokumpu’s most corrosion resistant martensitic grade, good resistance in moderately corrosive, low chloride containing environments. Very good mechanical properties and wear resistance. Medium-high hardness. Applied for e.g. surgical instruments, food processing equipment, mechanical parts, machine and pump construction.

Typical applications

  • Surgical instruments
  • Food processing equipment
  • Mechanical parts
  • Machine and pump construction


Product forms, available sizes and finishes


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, 2J0,50-5,00350-1350
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.

Typical 0.4116.11.0
EN 10088-2 0.33-0.45≤1.515.5-17.5≤1.000.8-1.3
Mechanical properties



StandardRp0.2Rp1.0RmElongationImpact strengthRockwellHBHV
Product type: Cold rolled coil and sheet
Typical (thickness 1 mm)460490720
EN 10088-2 ≤ 900 ≥ 12
Product type: Hot rolled coil and sheet
EN 10088-2 ≤ 900 ≥ 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

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 10088-21.4122