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
Cold rolled coil and sheet2B0,50-4,50≤ 1250
Hot rolled coil and plateHot rolled white5,00-6,00≤ 1250
Chemical composition


The chemical composition is given as % by weight.

TypicalDura 41220.4116.11.0
EN 10088-21.41220.33-0.45<1.5015.5-17.5<10.80-1.30Si:<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 412246049072093HRB

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