Forta 316Ti/4571
EN 1.4571, ASTM TYPE 316Ti / UNS S31635

General characteristics

Forta 317Ti/4571 is a titanium-stabilized, molybdenum-alloyed austenitic steel for highly corrosive environments, including applications in elevated temperatures.

Typical applications

  • Chimney constructions
  • Flue gas applications

 

Product forms, available sizes and finishes

Flat

Product typeFinishesThicknessWidth
Cold rolled coil2H0,05-6,003-1530
Cold rolled sheet2H0,30-6,00100-1530
Precision strip2H0,05-1,503-630
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.

CMnCrNiMoNOther
Typical 0.0416.810.92.1Ti
ASME II A SA-240 ≤0.08≤2.0016.00-18.0010.00-14.002.00-3.00≤0.10
ASTM A240 ≤0.08≤2.0016.0-18.010.0-14.02.00-3.00≤0.10
EN 10028-7 ≤0.08≤2.0016.5-18.510.5-13.52.00-2.50
EN 10088-2 ≤0.08≤2.016.5-18.510.5-13.52.0-2.5
EN 10088-3 ≤0.08≤2.0016.5-18.510.5-13.52.00-2.50
EN 10088-4 ≤0.08≤2.016.5-18.510.5-13.52.0-2.5
EN 10088-4 -5MEK ≤0.08≤2.016.5-18.510.5-13.52.0-2.5
IS 6911 ≤0.08≤2.016.0-18.010.0-14.02.00-3.00≤0.10
MPS/SF/0005 ≤0.08≤2.0016.00-18.0010.00-14.002.00-3.00≤0.10
Mechanical properties

StandardRp0.2Rp1.0RmImpact strengthRockwellHBHV
 MPaMPaMPaJ
Product type: Cold rolled coil and sheet
Typical (thickness 1 mm)285310615
ASME II A SA-240 ≥ 205 ≥ 515 ≤ 217
ASTM A240 ≥ 205 ≥ 515 ≤ 95HRB ≤ 217
EN 10028-7 ≥ 240 ≥ 270540-690
EN 10088-2 ≥ 240 ≥ 270540-690
EN 10088-4 ≥ 240 ≥ 270540-690
IS 6911 ≥ 205 ≥ 515 ≤ 95HRB ≤ 217
Product type: Hot rolled coil and sheet
Typical (thickness 4 mm)295345595170
ASME II A SA-240 ≥ 205 ≥ 515 ≤ 217
ASTM A240 ≥ 205 ≥ 515 ≤ 217
EN 10028-7 ≥ 240 ≥ 270540-690
EN 10088-2 ≥ 240 ≥ 270540-690
EN 10088-4 ≥ 240 ≥ 270540-690
IS 6911 ≥ 205 ≥ 515 ≤ 95HRB ≤ 217
Product type: Hot rolled quarto plate
Typical (thickness 15 mm)260300570
ASME II A SA-240 ≥ 205 ≥ 515 ≤ 95HRB ≤ 217
ASTM A240 ≥ 205 ≥ 515 ≤ 95HRB ≤ 217
EN 10028-7 ≥ 220 ≥ 260520-670
EN 10088-2 ≥ 220 ≥ 260520-670
EN 10088-4 ≥ 220 ≥ 260520-670
EN 10088-4 -5MEK ≥ 209 ≥ 247494.0-636.5
IS 6911 ≥ 205 ≥ 515 ≤ 95HRB ≤ 217
MPS/SF/0005 ≥ 205 ≥ 515 ≤ 95HRB ≤ 217

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
2415±2<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

Physical properties according to EN 10088 are shown below.

 

DensityModulus of elasticityThermal exp. at 100 °CThermal conductivityThermal capacityElectrical resistanceMagnetizable
kg/dm3GPa10-6/°CW/m°CJ/kg°CµΩm
8.020016,5155000.75No
Fabrication

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

 

Standards & approvals

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

 

StandardDesignation
ASME SA-240M Code Sect. II. Part ATYPE 316Ti / UNS S31635
ASTM A240/A240MTYPE 316Ti / UNS S31635
EN 10028-7, PED 2014/68/EU1.4571
EN 10088-21.4571
EN 10088-31.4571
EN 10088-41.4571
IS 6911, AMENDMENT NO. 2ISS 316 TI
Material Purchase Specification MPS/SF/0005TYPE 316Ti