Forta 316L/4404
EN 1.4404, ASTM TYPE 316L / UNS S31603

General characteristics

A low-carbon, molybdenum-alloyed alternative to Supra 316/4401 that is widely used for various applications with higher than average corrosion resistance requirements. Forta 316L/4404 is strengthened with temper rolling for applications that require specific strength as well as improved weldability and intergranular corrosion resistance.

Typical applications

  • Chemical tanks and tubing
  • Pulp and paper process equipment

 

Product forms, available sizes and finishes

Flat

Product typeFinishesThicknessWidth
Cold rolled coil2H0,05-6,003-1530
Cold rolled sheet2H0,25-6,0018-1530
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 0.0217.210.12.1
ASME II A SA-240 ≤0.030≤2.0016.0-18.010.0-14.02.00-3.00≤0.10
ASTM A240 ≤0.030≤2.0016.0-18.010.0-14.02.00-3.00≤0.10
ASTM A666 ≤0.030≤2.0016.0-18.010.0-14.02.00-3.00≤0.10
EN 10028-7 ≤0.030≤2.0016.5-18.510.0-13.02.00-2.50≤0.10
EN 10088-2 ≤0.030≤2.016.5-18.510.0-13.02.0-2.5≤0.10
EN 10088-3 ≤0.030≤2.0016.5-18.510.0-13.02.0-2.5≤0.10
EN 10088-4 ≤0.030≤2.016.5-18.510.0-13.02.0-2.5≤0.10
IS 6911 ≤0.030≤2.0016.0-18.010.0-14.02.00-3.00≤0.10
TECHNETICS M118 Rev A (Z2 CND  ≤0.030≤2.016-1910.0-14.02.0-2.5≤0.11
Mechanical properties

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

StandardRp0.2Rp1.0RmImpact strengthRockwellHBHV
 MPaMPaMPaJ
Product type: Cold rolled coil and sheet
Typical (thickness 1 mm)300325625
ASME II A SA-240 ≥ 170 ≥ 485 ≤ 217
ASTM A240 ≥ 170 ≥ 485 ≤ 95HRB ≤ 217
EN 10028-7 ≥ 240 ≥ 270530-680
EN 10088-2 ≥ 240 ≥ 270530-680
EN 10088-4 ≥ 240 ≥ 270530-680
IS 6911 ≥ 170 ≥ 485 ≤ 95HRB ≤ 217
TECHNETICS M118 Rev A (Z2 CND ≥ 240 ≥ 270530-680
Product type: Hot rolled coil and sheet
Typical (thickness 4 mm)300350600170
ASME II A SA-240 ≥ 170 ≥ 485 ≤ 217
ASTM A240 ≥ 170 ≥ 485 ≤ 217
EN 10028-7 ≥ 240 ≥ 270530-680
EN 10088-2 ≥ 240 ≥ 270530-680
EN 10088-4 ≥ 240 ≥ 270530-680
IS 6911 ≥ 170 ≥ 485 ≤ 95HRB ≤ 217
TECHNETICS M118 Rev A (Z2 CND ≥ 240 ≥ 270530-680
Product type: Hot rolled quarto plate
Typical (thickness 15 mm)260300570
ASME II A SA-240 ≥ 170 ≥ 485 ≤ 95HRB ≤ 217
ASTM A240 ≥ 170 ≥ 485 ≤ 95HRB ≤ 217
EN 10028-7 ≥ 220 ≥ 260520-670
EN 10088-2 ≥ 220 ≥ 260520-670
EN 10088-4 ≥ 220 ≥ 260520-670
IS 6911 ≥ 170 ≥ 485 ≤ 95HRB ≤ 217
TECHNETICS M118 Rev A (Z2 CND ≥ 220 ≥ 260520-670
Product type: Wire rod
Typical220260530

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
2420±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
8.020016,0155000.75No
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 316L / UNS S31603
ASTM A240/A240MTYPE 316L / UNS S31603
ASTM A666TYPE 316L / UNS S31603
EN 10028-7, PED 2014/68/EU1.4404
EN 10088-21.4404
EN 10088-31.4404
EN 10088-41.4404
IS 6911, AMENDMENT NO. 2ISS 316 L
TECHNETICS M118 Rev A (Z2 CND 17-12 acc RCCM M3307) + JN 14-20161.4404