Dura 410/4006
EN 1.4006, ASTM TYPE 410 / UNS S41000

General characteristics

Low hardness martensitic grade. Corrosion resistant in water and steam. Mainly supplied as plate or long product for mechanical engineering applications (e.g. valves, axles, pump parts).

Typical applications

  • Valves, axles, pump parts and nozzles
  • Shears and surgical instruments
  • Wear resistant surfaces

 

Product forms, available sizes and finishes

Long

Product typeFinishesThicknessWidth
Cast billet127,00-180,00127-180
Cast billet127,00-180,00127-180
Cast slab195,00-305,001000-1580
Cast slab165,00-175,001000-1500
Cold drawn bar hex8,00-25,408-25
Cold drawn bar hex8,00-25,408-25
Cold drawn bar round6,00-25,406-25
Cold drawn bar round6,00-25,406-25
Cold drawn bar square8,00-22,008-22
Cold drawn bar square8,00-22,008-22
Forged billet round160,00-200,00160-200
Forged billet round160,00-200,00160-200
Forged billet square160,00-200,00160-200
Forged billet square160,00-200,00160-200
Hot rolled / Black bar round75,00-180,0075-180
Hot rolled / Black bar round75,00-180,0075-180
Peeled / turned bar round70,00-170,0070-170
Peeled / turned bar round70,00-170,0070-170
Rolled billet round75,00-160,0075-160
Rolled billet round75,00-160,0075-160
Rolled billet square75,00-160,0075-160
Rolled billet square75,00-160,0075-160
Wire rod (Rod coil) hex9,00-27,009-27
Wire rod (Rod coil) hex9,00-27,009-27
Wire rod (Rod coil) round5,00-27,005-27
Wire rod (Rod coil) round5,00-27,005-27
Wire rod (Rod coil) square9,00-24,009-24
Wire rod (Rod coil) square9,00-24,009-24
Chemical composition

The chemical composition is shown in the table below.

The chemical composition is given as % by weight.

CMnCrNiMoNOther
Typical 0.1212.0
ASME II A SA-240 0.08-0.15≤1.0011.5-13.5≤0.75
ASTM A240 0.08-0.15≤1.0011.5-13.5≤0.75
EN 10088-2 0.08-0.15≤1.511.5-13.5≤0.75
EN 10088-3 0.08-0.15≤1.511.5-13.5≤0.75
EN 10088-4 0.08-0.15≤1.511.5-13.5≤0.75
EN 10088-4 -5MEK 0.08-0.15≤1.511.5-13.5≤0.75
Mechanical properties

The mechanical properties of the available products are given in the table below.

 

StandardRp0.2Rp1.0RmElongationImpact strengthRockwellHBHV
 MPaMPaMPa%J
Product type: Cold rolled coil and sheet
Typical (thickness 1 mm)
ASME II A SA-240 ≥ 205 ≥ 450 ≤ 217
ASTM A240 ≥ 205 ≥ 450 ≤ 96HRB ≤ 217
EN 10088-2 ≤ 600 ≥ 20
Product type: Hot rolled coil and sheet
Typical (thickness 4 mm)
ASME II A SA-240 ≥ 205 ≥ 450 ≤ 217
ASTM A240 ≥ 205 ≥ 450 ≤ 217
EN 10088-2 ≤ 600 ≥ 20
Product type: Hot rolled quarto plate
Typical (thickness 15 mm)30036056030
ASME II A SA-240 ≥ 205 ≥ 450 ≤ 217
ASTM A240 ≥ 205 ≥ 450 ≤ 217
Product type: Wire rod
Typical34043058030

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

For more information, see Outokumpu Corrosion Handbook.

Pitting corrosion resistanceCrevice corrosion resistance
PRECPTCCT
12<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

Data according to EN 10088, EN 10095 or typical values.

 

DensityModulus of elasticityThermal exp. at 100 °CThermal conductivityThermal capacityElectrical resistanceMagnetizable
kg/dm3GPa10-6/°CW/m°CJ/kg°CµΩm
7,721510,5304600,60Yes
Fabrication

Welding
The microstructure of 4006 comprises tempered martensite and some carbide.The steel is normally not considered to be weldable, but if thinner gauges are occasionally welded, the use of low-hydrogen methods (MAG or TIG) is to be preferred to avoid cold cracking. Any electrodes used must be of the basic type. The martensitic steels must be preheated to temperatures above MS (typically 250-400ºC). The interpass temperature should be in the same range. The heat input should not be too high or too low (0.5-1.5 kJ/mm).
 Austenitic fillers are most commonly used. This avoids the post weld heat treatment that is necessary when compositionally matched filler is used.Much depends on the composition of the steel and the degree of restraint used. When there is no preheating, post weld heat treatment is necessary. However, it may be possible to weld very thin gauges without preheating.

 

Standards & approvals

The most commonly used international product standards are given in the table below.

 

StandardDesignation
ASME SA-240M Code Sect. II. Part ATYPE 410 / UNS S41000
ASTM A240/A240MTYPE 410 / UNS S41000
EN 10088-21.4006
EN 10088-31.4006
EN 10088-41.4006