Forta 304/4301
EN 1.4301, ASTM TYPE 304 / UNS S30400

General characteristics

Forta 304/4301 is a classic 18% chromium, 8% nickel austenitic stainless steel. Forta 304/4301 is an all-purpose product with good resistance to atmospheric corrosion and to many organic and inorganic chemicals.

Typical applications

  • Vehicle chassis
  • Containers
  • Constructions

 

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 this 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 0.0418.18.1
ASME II A SA-240 ≤0.07≤2.0017.5-19.58.0-10.5≤0.10
ASTM A240 ≤0.07≤2.0017.5-19.58.0-10.5≤0.10
ASTM A666 ≤0.08≤2.0018.0-20.08.0-10.5≤0.10
EN 10028-7 ≤0.07≤2.0017.5-19.58.0-10.5≤0.10
EN 10088-2 ≤0.07≤2.017.5-19.58.0-10.5≤0.10
EN 10088-3 ≤0.07≤2.0017.5-19.58.0-10.5≤0.10
EN 10088-4 ≤0.07≤2.017.5-19.58.0-10.5≤0.10
GOST 5632-72 ≤0.12≤2.017.0-19.08.0-10.0≤0.35≤0.10
GOST 5632-72 Chemical analysis ≤0.12≤2.017.0-19.08.0-10.0≤0.35≤0.10
IS 6911 ≤0.07≤2.0017.5-19.58.0-10.5≤0.70≤0.10
IS 6911 ≤0.07≤2.0017.5-19.58.0-10.5≤0.70≤0.10
MSP4002 ≤0.07≤2.0017.5-19.58.0-10.5≤0.10
Mechanical properties

StandardRp0.2Rp1.0RmImpact strengthRockwellHBHV
 MPaMPaMPaJ
Product type: Cold rolled coil and sheet
Typical (thickness 1 mm)285315640
ASME II A SA-240 ≥ 205 ≥ 515 ≤ 201
ASTM A240 ≥ 205 ≥ 515 ≤ 92HRB ≤ 201
EN 10028-7 ≥ 230 ≥ 260540-750
EN 10088-2 ≥ 230 ≥ 260540-750
EN 10088-4 ≥ 230 ≥ 260540-750
GOST 5632-72 ≥ 230 ≥ 260540-670
IS 6911 ≥ 205 ≥ 515 ≤ 92HRB ≤ 201
IS 6911 ≥ 205 ≥ 515 ≤ 92HRB ≤ 201
Product type: Hot rolled coil and sheet
Typical (thickness 4 mm)285340625175
ASME II A SA-240 ≥ 205 ≥ 515 ≤ 201
ASTM A240 ≥ 205 ≥ 515 ≤ 201
EN 10028-7 ≥ 230 ≥ 260520-720
EN 10088-2 ≥ 230 ≥ 260520-720
EN 10088-4 ≥ 230 ≥ 260520-720
GOST 5632-72 ≥ 230 ≥ 260540-670
IS 6911 ≥ 205 ≥ 515 ≤ 92HRB ≤ 201
IS 6911 ≥ 205 ≥ 515 ≤ 92HRB ≤ 201
Product type: Hot rolled quarto plate
Typical (thickness 15 mm)270300600
ASME II A SA-240 ≥ 205 ≥ 515 ≤ 92HRB ≤ 201
ASTM A240 ≥ 205 ≥ 515 ≤ 92HRB ≤ 201
EN 10028-7 ≥ 210 ≥ 250520-720
EN 10088-2 ≥ 210 ≥ 250520-720
EN 10088-4 ≥ 210 ≥ 250520-720
IS 6911 ≥ 205 ≥ 515 ≤ 92HRB ≤ 201
IS 6911 ≥ 205 ≥ 515 ≤ 92HRB ≤ 201
MSP4002 ≥ 210 ≥ 250520-720
Product type: Wire rod
Typical290330600

1)Elongation according to EN standard:
A80 for thickness < 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

 

 

Physical properties

Physical properties according to EN 10088-1 are given in the table below.

 

DensityModulus of elasticityThermal exp. at 100 °CThermal conductivityThermal capacityElectrical resistanceMagnetizable
kg/dm3GPa10-6/°CW/m°CJ/kg°CµΩm
7.920016155000.73No
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 304 / UNS S30400
ASTM A240/A240MTYPE 304 / UNS S30400
ASTM A666TYPE 304 / UNS S30400
EN 10028-7, PED 2014/68/EU1.4301
EN 10088-21.4301
EN 10088-31.4301
EN 10088-41.4301
GOST 5632-7212X18H9
GOST 5632-72 Chemical analysis only12X18H9
IS 6911, AMENDMENT NO. 2ISS 304; ISS 304 S1
MAN Cryo MSP4002-M-600310370 Rev.011.4301