Forta 304L/4307
EN 1.4307, ASTM TYPE 304L / UNS S30403

General characteristics

Forta 304L/4307 is a low-carbon alternative to Core 304/4301. Forta 304L/4307 is an all- purpose product with good resistance to atmospheric and intergranular corrosion.

Typical applications

  • Steel constructions
  • Containers
  • Vehicle chassis

 

Product forms, available sizes and finishes

Flat

Product typeFinishesThicknessWidth
Cold rolled coil2H0,05-6,003-1530
Cold rolled sheet2H0,30-6,0018-1530
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 0.0218.18.1
ASME II A SA-240 ≤0.030≤2.0017.5-19.58.0-12.0≤0.10
ASTM A240 ≤0.030≤2.0017.5-19.58.0-12.0≤0.10
ASTM A666 ≤0.030≤2.0018.0-20.08.0-12.0≤0.10
EN 10028-7 ≤0.030≤2.0017.5-19.58.0-10.5≤0.10
EN 10088-2 ≤0.030≤2.017.5-19.58.0-10.5≤0.10
EN 10088-3 ≤0.030≤2.0017.5-19.58.0-10.5≤0.10
EN 10088-4 ≤0.030≤2.017.5-19.58.0-10.5≤0.10
IS 6911 ≤0.030≤2.0017.5-19.58.0-12.0≤0.70≤0.10
IS 6911 ≤0.030≤2.0017.5-19.58.0-12.0≤0.70≤0.10
Mechanical properties

StandardRp0.2Rp1.0RmImpact strengthRockwellHBHV
 MPaMPaMPaJ
Product type: Cold rolled coil and sheet
Typical (thickness 1 mm)295325650
ASME II A SA-240 ≥ 170 ≥ 485 ≤ 201
ASTM A240 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
EN 10028-7 ≥ 220 ≥ 250520-700
EN 10088-2 ≥ 220 ≥ 250520-700
EN 10088-4 ≥ 220 ≥ 250520-700
IS 6911 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
IS 6911 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
Product type: Hot rolled coil and sheet
Typical (thickness 4 mm)290345620175
ASME II A SA-240 ≥ 170 ≥ 485 ≤ 201
ASTM A240 ≥ 170 ≥ 485 ≤ 201
EN 10028-7 ≥ 220 ≥ 250520-700
EN 10088-2 ≥ 220 ≥ 250520-700
EN 10088-4 ≥ 220 ≥ 250520-700
IS 6911 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
IS 6911 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
Product type: Hot rolled quarto plate
Typical (thickness 15 mm)260300580
ASME II A SA-240 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
ASTM A240 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
EN 10028-7 ≥ 200 ≥ 240500-700
EN 10088-2 ≥ 200 ≥ 240500-700
EN 10088-4 ≥ 200 ≥ 240500-700
IS 6911 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
IS 6911 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
Product type: Wire rod
Typical280320580

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
18<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

 

For information on corrosion resistance properties in different environments, use the online corrosion tables.


For more detailed information, please refer to the Outokumpu Corrosion Handbook.

Physical properties

Values according to EN 10088

 

DensityModulus of elasticityThermal exp. at 100 °CThermal conductivityThermal capacityElectrical resistanceMagnetizable
kg/dm3GPa10-6/°CW/m°CJ/kg°CµΩm
7.920016.0155000.73No
Fabrication

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

Standards & approvals

This grade is often double certified as EN 1.4301/1.4307, ASTM Type 304/304L.

StandardDesignation
ASME SA-240M Code Sect. II. Part ATYPE 304L / UNS S30403
ASTM A240/A240MTYPE 304L / UNS S30403
ASTM A666TYPE 304L / UNS S30403
EN 10028-7, PED 2014/68/EU1.4307
EN 10088-21.4307
EN 10088-31.4307
EN 10088-41.4307
IS 6911, AMENDMENT NO. 2ISS 304 S2; ISS 304L

 

Download Outokumpu manufacturing site certificates and approvals.