Dura 17-4PH

General characteristics

A martensitic precipitation hardening steel with high strength and hardness, good corrosion resistance, and satisfactory formability (depending on heat treatment/condition).

Typical applications

  • Oil field equipment
  • Chemical process equipment
  • Fittings
  • Pump shafts
  • Gears


Product forms, available sizes and finishes


Product typeFinishesThicknessWidth
Cast billet127,00-180,00127-180
Cold drawn bar hex16,00-16,0016-16
Cold drawn bar round16,00-16,0016-16
Cold drawn bar square16,00-16,0016-16
Forged billet round160,00-200,00160-200
Forged billet square160,00-200,00160-200
Hot rolled / Black bar round75,00-200,0075-200
Peeled / turned bar round70,00-170,0070-170
Rolled billet round90,00-160,0090-160
Rolled billet square75,00-160,0075-160
Wire rod (Rod coil) hex9,00-27,009-27
Wire rod (Rod coil) round5,00-27,005-27
Wire rod (Rod coil) square9,00-24,009-24
Chemical composition


The typical chemical composition for this grade is given in the table below, together with composition limits given for the product according to different standards. The required standard will be fully met as specified on the order.

The chemical composition is given as % by mass.

Typical 0.0215.54.8Cu:3.4 Nb
EN 10088-2 ≤0.07≤1.515.0-17.03.0-5.0≤0.60Cu:3.0-5.0
EN 10088-4 ≤0.07≤1.515.0-17.03.0-5.0≤0.60Cu:3.0-5.0
Mechanical properties



StandardRp0.2Rp1.0RmElongationImpact strengthRockwellHBHV
Product type: Cold rolled coil and sheet
EN 10088-2 ≤ 1275 ≥ 5
Product type: Wire rod


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


More detailed information concerning welding procedures can be obtained from the Outokumpu Welding Handbook, available from our sales offices.

Standards & approvals



EN 10088-21.4542
EN 10088-41.4542