EN 1.4311, ASTM TYPE 304LN / UNS S30453 Stainless Steel

EN 1.4311, ASTM TYPE 304LN / UNS S30453 Stainless Steel

EN 1.4311, ASTM TYPE 304LN / UNS S30453 Stainless Steel General Characteristics 304LN/4311 is a low-carbon, higher nickel and nitrogen alloyed alternative to 304/4301 with improved strength and low-temperature toughness. Suitable for applications that require high tensile strength. is an...
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EN 1.4311, ASTM TYPE 304LN / UNS S30453 Stainless Steel

General Characteristics

304LN/4311 is a low-carbon, higher nickel and nitrogen alloyed alternative to 304/4301 with improved strength and low-temperature toughness. Suitable for applications that require high tensile strength. is an austenitic stainless steel that belongs to the standard CrNi stainless steel family.


The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products. Due to its fully austenitic structure, 304LN/4311 is suitable for applications with low magnetic permeability requirements (µ < 1.005).


Typical Applications

Railroad cars

Pressure vessels

Chemical plant equipment(mild to medium corrosive environments)

Flanges and valves


Product forms, available sizes and finishes

Flat

Product type

Finishes

Thickness

Width
Cold rolled coil

2B, 2BB, 2C, 2D, 2E, 2G, 2H, 2J, 2R

0,05-6,00

3-2050

Cold rolled sheet

2B, 2BB, 2D, 2E, 2G, 2H, 2J, 2R

0,80-6,00

600-2050

Hot rolled coil, pickled

1D, 1G, 1U

2,00-12,70

750-2050

Precision strip

2H, 2R

0,05-1,50

3-649

Quarto plate

1D

5,00-50,00

400-3200


Long

Product typeFinishesThicknessWidth
Cast billet

127,00-180,00

127-180

Cast slab


165,00-205,00

1000-1500

Cold drawn bar hex


8,00-25,40

8-25

Cold drawn bar round


6,00-25,40

6-25

Cold drawn bar square


8,00-22,00

8-22

Rebar coil

LP PI

6,00-25,00

6-25

Wire rod (Rod coil) hex


9,00-27,00

9-27

Wire rod (Rod coil) round


5,00-27,00

5-27

Wire rod (Rod coil) square


9,00-24,00

9-24


Chemical Composition

The chemical composition may vary slightly between different product standards. The required standard will befully met as specified on the order.


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.


CMnCrNiMoN
Typical

0.02


18.5

9.2


0.14

ASME II A SA-240

≤0.030

≤2.00

18.0-20.0

8.0-12.0


0.10-0.16

ASTM A240

≤0.030

≤2.00

18.0-20.0

8.0-12.0


0.10-0.16

ASTM A666

≤0.030

≤2.00

18.0-20.0

8.0-12.0


0.10-0.16

EN 10028-7

≤0.030

≤2.00

17.0-19.5

8.5-11.5


0.12-0.22

EN 10088-2

≤0.030

≤2.0

17.5-19.5

8.5-11.5


0.12-0.22

EN 10088-3

≤0.030

≤2.00

17.5-19.5

8.5-11.5


0.12-0.22

EN 10088-4

≤0.030

≤2.0

17.5-19.5

8.5-11.5


0.12-0.22

IS 6911

≤0.030

≤2.00

18.0-20.0

8.0-12.0

≤0.70

0.10-0.16


Mechanical Properties

The mechanical properties of the available products in the soft annealed condition at room temperature are given in the table below. Moderate strengths can be reached at elevated temperatures (~550 °C / 1022 °F). Temperatures for excessive scaling are close to 850 °C / 1562 °F. 


This grade ,along with other austenitic corrosion-resistant steels, exhibits very high ductility and high elongation to fracture. It is not susceptible to brittle fracture in the solution annealed condition.


StandardRp0.2Rp1.0RmElongationRockwellHB

MPa

MPa

MPa

%



Product type: Cold rolled coil and sheet

Typical (thickness 1 mm)







ASME II A SA-240

≥ 205


≥ 515



≤ 217

ASTM A240

≥ 205


≥ 515


≤ 95HRB

≤ 217

EN 10028-7

≥ 290

≥ 320

550-750

≥ 40



EN 10088-2

≥ 290

≥ 320

550-750

≥ 40



EN 10088-4

≥ 290

≥ 320

550-750

≥ 40



IS 6911

≥ 205


≥ 515


≤ 95HRB

≤ 217

Product type: Hot rolled coil and sheet

Typical (thickness 4 mm)

355

410

665

50



ASME II A SA-240

≥ 205


≥ 515



≤ 217

ASTM A240

≥ 205


≥ 515



≤ 217

EN 10028-7

≥ 290

≥ 320

550-750

≥ 40



EN 10088-2

≥ 290

≥ 320

550-750

≥ 40



EN 10088-4

≥ 290

≥ 320

550-750

≥ 40



IS 6911

≥ 205


≥ 515


≤ 95HRB

≤ 217

Product type: Hot rolled quarto plate

Typical (thickness 15 mm)

310

350

640

55



ASME II A SA-240

≥ 205


≥ 515


≤ 95HRB

≤ 217

ASTM A240

≥ 205


≥ 515


≤ 95HRB

≤ 217

EN 10028-7

≥ 270

≥ 310

550-750

≥ 40



EN 10088-2

≥ 270

≥ 310

550-750

≥ 40



EN 10088-4

≥ 270

≥ 310

550-750

≥ 40



IS 6911

≥ 205


≥ 515


≤ 95HRB

≤ 217

Product type: Wire rod

Typical

320

360

640

55




Physical Properties (Data according to EN 10088)

DensityModulus of elasticityThermal exp. at 100 °CThermal conductivity

kg/dm3

GPa

10-6/°C

W/m°C

7.9

200

16.0

15


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