EN 1.4521, ASTM TYPE 444 / UNS S44400 Stainless Steel

EN 1.4521, ASTM TYPE 444 / UNS S44400 Stainless Steel

EN 1.4521, ASTM TYPE 444 / UNS S44400 Stainless Steel General Characteristics 444/1.4521 is a nickel-free, molybdenum alloyed ferritic stainless steel with very good corrosion resistance, good cold formability, and high strength. 444/1.4521 allows for thinner walls in tanks and is not prone to...
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EN 1.4521, ASTM TYPE 444 / UNS S44400 Stainless Steel

General Characteristics

444/1.4521 is a nickel-free, molybdenum alloyed ferritic stainless steel with very good corrosion resistance, good cold formability, and high strength. 444/1.4521 allows for thinner walls in tanks and is not prone to stress-corrosion cracking.


444/1.4521 is a 2% molybdenum-alloyed ferritic stainless steel with medium chromium that can be used in many corrosive environments. As a ferritic stainless steel, it has high resistance to chloride-induced stress corrosion cracking. Because of its titanium alloying, 444/1.4521 can be welded in all dimensions without becoming susceptible to intergranular corrosion.


Typical Applications

  • Hot water tanks

  • Drinking water pipes


Chemical Composition

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


18.0


2.0


ASTM A240

≤0.025

≤1.00

17.5-19.5

≤1.00

1.75-2.50

≤0.035

EN 10028-7

≤0.025

≤1.00

17.00-20.00


1.80-2.50

≤0.030

EN 10088-2

≤0.025

≤1.0

17.0-20.0


1.8-2.5

≤0.030

EN 10088-4

≤0.025

≤1.0

17.0-20.0


1.8-2.5

≤0.030

IS 6911

≤0.025

≤1.00

17.5-19.5

≤1.00

1.75-2.50

≤0.035


Mechanical Properties

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

StandardRp0.2Rp1.0RmElongationRockwellHB

MPa

MPa

MPa

%



Product type: Cold rolled coil and sheet

Typical (thickness 1 mm)

350

370

525

50



ASTM A240

≥ 275


≥ 415


≤ 96HRB

≤ 217

EN 10028-7

≥ 320


420-640

≥ 20



EN 10088-2

≥ 300


420-640

≥ 20



EN 10088-4

≥ 300


420-640




IS 6911

≥ 275


≥ 415


≤ 96HRB

≤ 217

Product type: Hot rolled coil and sheet

Typical (thickness 4 mm)

380

420

450

32


85

ASTM A240

≥ 275


≥ 415



≤ 217

EN 10088-2

≥ 280


400-600

≥ 20



EN 10088-4

≥ 280


400-600




IS 6911

≥ 275


≥ 415


≤ 96HRB

≤ 217

Product type: Hot rolled quarto plate

Typical (thickness 15 mm)

360

400

540

26



ASTM A240

≥ 275


≥ 415



≤ 217

EN 10028-7

≥ 300


420-620




EN 10088-2

≥ 280


420-620

≥ 20



EN 10088-4

≥ 300


420-620




IS 6911

≥ 275


≥ 415


≤ 96HRB

≤ 217

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.


Physical Properties

Data according to EN 10088

DensityModulus of elasticity

Thermal exp. at 100 °C

Thermal conductivityThermal capacityElectrical resistanceMagnetizable

kg/dm3

GPa

10-6/°C

W/m°C

J/kg°C

µΩm


7.7

220

10,4

23

430

0.80

Yes


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