Forta 301LN/4318
EN 1.4318, ASTM TYPE 301LN / UNS S30153

General characteristics

Forta 301LN/4318 is a low-carbon, nitrogen-alloyed alternative to Forta 301/4310 with elevated strength, making it particularly suitable for lightweight construction applications.

Typical applications

  • Vehicle chassis

 

Product forms, available sizes and finishes

Flat

Product typeFinishesThicknessWidth
Cold rolled coil2H0,05-6,003-1530
Cold rolled sheet2H0,50-6,0035-1530
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 0.0217.76.50.14
ASTM A240 ≤0.03≤2.0016.0-18.06.0-8.00.07-0.20
ASTM A666 ≤0.03≤2.0016.0-18.06.0-8.00.07-0.20
EN 10028-7 ≤0.030≤2.0016.50-18.506.00-8.000.10-0.20
EN 10088-2 ≤0.030≤2.016.5-18.56.0-8.00.10-0.20
EN 10088-4 ≤0.030≤2.016.5-18.56.0-8.00.10-0.20
EN 10088-4 -5MEK ≤0.030≤2.016.5-18.56.0-8.00.10-0.20
IS 6911 ≤0.03≤2.0016.0-18.06.0-8.0≤0.700.07-0.20
Mechanical properties

 

StandardRp0.2Rp1.0RmImpact strengthRockwellHBHV
 MPaMPaMPaJ
Product type: Cold rolled coil and sheet
Typical (thickness 1 mm)360400750
ASTM A240 ≥ 240 ≥ 550 ≤ 100HRB ≤ 241
EN 10028-7 ≥ 350 ≥ 380650-850
EN 10088-2 ≥ 350 ≥ 380650-850
EN 10088-4 ≥ 350 ≥ 380650-850
IS 6911 ≥ 240 ≥ 550 ≤ 100HRB ≤ 241
Product type: Hot rolled coil and sheet
Typical (thickness 4 mm)35040074090
ASTM A240 ≥ 240 ≥ 550
EN 10028-7 ≥ 350 ≥ 380650-850
EN 10088-2 ≥ 350 ≥ 380650-850
EN 10088-4 ≥ 350 ≥ 380650-850
IS 6911 ≥ 240 ≥ 550 ≤ 100HRB ≤ 241
Product type: Hot rolled quarto plate
Typical (thickness 15 mm)345380750
ASTM A240 ≥ 240 ≥ 550
EN 10028-7 ≥ 330 ≥ 370650-850
EN 10088-2 ≥ 330 ≥ 370630-830
EN 10088-4 ≥ 330 ≥ 370630-830
EN 10088-4 -5MEK ≥ 330 ≥ 370630-830
IS 6911 ≥ 240 ≥ 550 ≤ 100HRB ≤ 241

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
20<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

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

 

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

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

Standards & approvals

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

 

StandardDesignation
ASTM A240/A240MTYPE 301LN / UNS S30153
ASTM A666TYPE 301LN / UNS S30153
EN 10028-7, PED 2014/68/EU1.4318
EN 10088-21.4318
EN 10088-41.4318
IS 6911, AMENDMENT NO. 2ISS 301LN