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

 

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.

StandardGradeCMnCrNiMoNOther
Typical43070.0218.18.1
ASME II A SA-240TYPE 304L≤0.030≤2.0017.5-19.58.0-12.0≤0.10
ASTM A240TYPE 304L≤0.030≤2.0018.0-20.08.0-12.0≤0.10
ASTM A666TYPE 304L≤0.030≤2.0018.0-20.08.0-12.0≤0.10
EN 10028-71.4307≤0.030≤2.0017.5-19.58.0-10.5≤0.10
EN 10088-21.4307≤0.030≤2.017.5-19.58.0-10.5≤0.10
EN 10088-31.4307≤0.030≤2.0017.5-19.58.0-10.5≤0.10
EN 10088-41.4307≤0.030≤2.017.5-19.58.0-10.5≤0.10
HPC-UK6321 R41.4307≤0.030≤2.0017.5-19.58.0-10.5≤0.10
HW-INOX GmbH1.4307≤0.030≤2.0017.5-19.58.0-10.5≤0.10
IS 6911ISS 304 S2≤0.030≤2.0017.5-19.58.0-12.0≤0.70≤0.10
IS 6911ISS 304L≤0.030≤2.0017.5-19.58.0-12.0≤0.70≤0.10
PS640-1101/EBK/01S/371.4307≤0.030≤2.0017.5-19.58.0-10.5≤0.10
Mechanical properties

StandardGradeRp0.2Rp1.0RmImpact strengthRockwellHBHV
  MPaMPaMPaJ
Product type: Cold rolled coil and sheet
Typical (thickness 1 mm)295325650
ASME II A SA-240TYPE 304L ≥ 170 ≥ 485 ≤ 201
ASTM A240TYPE 304L ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
EN 10028-71.4307 ≥ 220 ≥ 250520-700
EN 10088-21.4307 ≥ 220 ≥ 250520-700
EN 10088-41.4307 ≥ 220 ≥ 250520-700
IS 6911ISS 304 S2 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
IS 6911ISS 304L ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
PS640-1101/EBK/01S/371.4307 ≥ 220 ≥ 250520-700
Product type: Hot rolled coil and sheet
Typical (thickness 4 mm)290345620175
ASME II A SA-240TYPE 304L ≥ 170 ≥ 485 ≤ 201
ASTM A240TYPE 304L ≥ 170 ≥ 485 ≤ 201
EN 10028-71.4307 ≥ 220 ≥ 250520-700
EN 10088-21.4307 ≥ 220 ≥ 250520-700
EN 10088-41.4307 ≥ 220 ≥ 250520-700
IS 6911ISS 304 S2 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
IS 6911ISS 304L ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
PS640-1101/EBK/01S/371.4307 ≥ 220 ≥ 250520-700
Product type: Hot rolled quarto plate
Typical (thickness 15 mm)260300580
ASME II A SA-240TYPE 304L ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
ASTM A240TYPE 304L ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
EN 10028-71.4307 ≥ 200 ≥ 240500-700
EN 10088-21.4307 ≥ 200 ≥ 240500-700
EN 10088-41.4307 ≥ 200 ≥ 240500-700
HPC-UK6321 R41.4307 ≥ 200 ≥ 240500-700
HW-INOX GmbH1.4307 ≥ 200 ≥ 240500-700
IS 6911ISS 304 S2 ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
IS 6911ISS 304L ≥ 170 ≥ 485 ≤ 92HRB ≤ 201
PS640-1101/EBK/01S/371.4307 ≥ 200 ≥ 240500-700
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*

*) Austenitic stainless steel grades may be magnetizable to a certain degree after cold deformation, e.g. in temper rolled condition.

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/EU)1.4307
EN 10088-21.4307
EN 10088-31.4307
EN 10088-41.4307
HPC-UK6321-U0-000-SPP-100001 Rev 041.4307
IS 6911, AMENDMENT NO. 2ISS 304 S2; ISS 304L
Siemens PS640-1101-EBK-01S-37 except items 7.2 and 81.4307
Zeugnisanforderungen HW-INOX GmbH Stand: Oktober 20211.4307

 

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