EN 1.4828 Stainless Steel

EN 1.4828 Stainless Steel

EN 1.4828 Stainless Steel General Characteristics Austenitic grade with improved oxidation resistance. Commonly used for furnace equipment (esp. supporting parts), annealing and hardening boxes, air heaters. A common feature of GNEE high temperature steels is that they are designed primarily for...
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EN 1.4828 Stainless Steel

General Characteristics

Austenitic grade with improved oxidation resistance. Commonly used for furnace equipment (esp. supporting parts), annealing and hardening boxes, air heaters.


A common feature of GNEE high temperature steels is that they are designed primarily for use at temperatures exceeding ~550 °C, i.e. in the temperature range where creep strength as a rule is the dimensioning factor and where HT corrosion occurs. Optimising steels for high temperatures has meant that their resistance to aqueous corrosion has been limited. All steels are austenitic, resulting in relatively high creep strength values.


Typical Applications

GNEE high temperature steels can be and have been used in a number of applications where the temperature exceeds 550°C, e.g. for equipment and components within:

  • Furnace equipment (esp. supporting parts)

  • Annealing and hardening boxes

  • Air heaters

  • Iron, steel, and non-ferrous industries

  • Engineering industry

  • Energy conversion plants

  • Cement industry


Chemical Composition

Typical chemical composition is given in the table below. The chemical composition is given as % by mass.


CMnCrNiNOther

Typical

0.05


19.3

11.2


Si:1.9

EN 10095

≤0.20

≤2.00

19.00-21.00

11.00-13.00

≤0.11

Si:1.50-2.50


Mechanical Properties

Whilst GNEE high temperature steels are mainly optimised for oxidation and high temperature corrosion resistance, they also have good mechanical properties, partly due to their austenitic structure and partly due to certain alloying elements. 

Design values are usually based on minimum proof strength values for constructions used at temperatures up to around 550°C. For higher temperatures, mean creep strength values are used.


StandardRp0.2Rp1.0RmElongationHB

MPa

MPa

MPa

%


Product type: Cold rolled coil and sheet

Typical (thickness 1 mm)

300

330

650



EN 10095

≥ 230

≥ 270

550-750

≥ 30


Product type: Hot rolled coil and sheet

Typical (thickness 4 mm)

325

370

630

59

82

EN 10095

≥ 230

≥ 270

550-750

≥ 30


Product type: Hot rolled quarto plate

Typical (thickness 15 mm)

270

310

610

55


EN 10095

≥ 230

≥ 270

550-750

≥ 30



Physical Properties

Data according to EN 10088

Density

Modulus of elasticity

Thermal exp. at 100 °C

Thermal conductivity

kg/dm3

GPa

10-6/°C

W/m°C

7.9

196

16,5

15


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