EN 1.4724 Stainless Steel Properties

EN 1.4724 Stainless Steel Properties

EN 1.4724 Stainless Steel Properties Chemical Composition The chemical composition is given in the table below. The chemical composition is given as % by weight. Mechanical Properties Mechanical properties at room temperature are shown in the table below. Physical Properties Data according to EN...
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EN 1.4724 Stainless Steel Properties

Chemical Composition

The chemical composition is given in the table below.

The chemical composition is given as % by weight.


CMnCrOther

Typical

0.07


12.5

Si:1.0 Al:0.9

EN 10095

≤0.12

≤1.00

12.00-14.00

Si:0.70-1.40


Mechanical Properties

Mechanical properties at room temperature are shown in the table below.

StandardRp0.2Rp1.0RmElongation

MPa

MPa

MPa

%

Product type: Cold rolled coil and sheet

Typical (thickness 1 mm)

480

510

600


Product type: Hot rolled quarto plate

Typical (thickness 15 mm)

340

370

515

30

EN 10095

≥ 250


450-650



Physical Properties

Data according to EN 10095.

Density

Thermal exp. at 100 °CThermal conductivity

kg/dm3

10-6/°C

W/m°C

7,7

10,5

21


Fabrication

Hot forming

Hot working should be carried out within the temperature ranges given under the headline Characteristic temperatures earlier in this datasheet.


Formability/Machining

Generally, ferrites are difficult to form in the cold condition. They are formable at room temperature when sheets are no thicker than 3 mm; 1.4713 even 6 mm. Thicker 1.4713 and 1.4724 plates must be preheated and formed within the temperature range 250 - 300°C. 1.4742 and 1.4762 should even be heated up to 800 - 900°C to avoid formation of any brittle phases. Generally, the minimum radius for bending deformation can be taken as “double thickness”. Machining is considered to be less problematic due to their low strain hardening rates.


Welding

The same precautions as for carbon steels are normally required. Preheating of the joints to 200-300°C is necessary for plates thicker than 3 mm. Due to grain growth in the heat affected zone, the heat input should be minimised. Gas shielded welding methods such as GTA (TIG), plasma arc and GMA (MIG) are preferred. Pure argon should be used as the shielding gas. Matching filler material has detrimental effect on the ductility why austenitic welding consumables, e.g. 307, 309 or 310 are recommended. If the weld will be exposed to a sulphurous environment, overlay welding with the matching ferritic filler will be necessary.


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