EN 1.4509, ASTM UNS S43940 Stainless Steel

EN 1.4509, ASTM UNS S43940 Stainless Steel

EN 1.4509, ASTM UNS S43940 Stainless Steel General Characteristics 441/4509 is a nickel-free 17% chromium ferritic stainless steel originally designed for exhaust systems, with good corrosion resistance and high-temperature strength. 441/4509 is available with a single (niobium) or dual (niobium...
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EN 1.4509, ASTM UNS S43940 Stainless Steel

General Characteristics

441/4509 is a nickel-free 17% chromium ferritic stainless steel originally designed for exhaust systems, with good corrosion resistance and high-temperature strength. 


441/4509 is available with a single (niobium) or dual (niobium and titanium) stabilizer. Due to good formability and weldability, it is often a suitable replacement for 301/4310.


441/4509 can be supplied with a wide range of functional and aesthetic surface finishes.


Typical Applications

Indoor cladding

Restaurant equipment and appliances

Tubes

Heat exchangers


Product forms, available sizes and finishes

Flat

Product typeFinishesThicknessWidth

Black hot band

1U

2,50-8,50

1000-1550

Cold rolled coil

2B, 2BB, 2C, 2D, 2E, 2F, 2G, 2H, 2J, 2K, 2M, 2R

0,05-3,58

3-1550

Cold rolled sheet

2B, 2BB, 2D, 2E, 2F, 2G, 2J, 2K, 2M, 2R

0,30-3,58

18-1550

Hot rolled coil, pickled

1C, 1D, 1E, 1G, 1M, 1U

2,00-8,00

50-1550

Precision strip

2R

0,05-1,50

3-649


Chemical Composition

The chemical composition may vary slightly between different product standards. The required standard will be fully met as specified in 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


CMnCrNiMoNOther

Typical

0.02


17.6


Ti Nb

ASME II A SA-240

≤0.030

≤1.00

17.0-19.0

≤0.50


≤0.030


ASME II A SA-240

≤0.030

≤1.00

17.5-18.5




Ti

ASTM A240

≤0.030

≤1.00

17.0-19.0

≤0.50


≤0.030


ASTM A240

≤0.030

≤1.00

17.5-18.5




Ti

EN 10028-7

≤0.030

≤1.00

17.50-18.50




Ti

EN 10088-2

≤0.030

≤1.0

17.5-18.5




Ti

EN 10088-4

≤0.030

≤1.0

17.5-18.5




Ti

IS 6911

≤0.030

≤1.00

17.0-19.0

≤0.50

≤0.30

≤0.030



Mechanical Properties

StandardRp0.2Rp1.0RmElongationRockwellHB

MPa

MPa

MPa

%



Product type: Cold rolled coil and sheet







Typical (thickness 1 mm)

310

330

480

55



ASTM A240

≥ 205


≥ 415


≤ 89HRB

≤ 183

ASTM A240

≥ 250


≥ 430


≤ 88HRB

≤ 180

EN 10088-2

≥ 230


430-630

≥ 18



EN 10088-4

≥ 230


430-630

≥ 18



IS 6911

≥ 205


≥ 415


≤ 89HRB

≤ 183

Product type: Hot rolled coil and sheet







Typical (thickness 4 mm)

365

395

500

31


78

IS 6911

≥ 205


≥ 415


≤ 89HRB

≤ 183

Product type: Hot rolled quarto plate







IS 6911

≥ 205


≥ 415


≤ 89HRB

≤ 183


Physical Properties

Data according to EN 10088

DensityModulus of elasticityThermal exp. at 100 °CThermal conductivity

kg/dm3

GPa

10-6/°C

W/m°C

7,7

220

10,0

25


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