DIN17455 Weld Circular Stainless Steel Tubes With General Quality Requirements

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DIN17455 Weld Circular Stainless Steel Tubes With General Quality Requirements

Scope of DIN17455 standard

This standard specifies technical delivery conditions for general purpose welded circular tubes made of stainless ferritic or austenitic steels. Tubes of this kind may be used in construction or in the food, pharmaceutical and automobile industries, as well as for domestic installations or decorative purposes. Tubes covered by this standard are designed for an 80% utilization of design stress in the weld. Stainless steel tubes under this standard are applicable for electric arc cutting.

Definition of ferrite

Ferrite (abbreviation: ferrite, FN, F) or interstitial carbon in alpha-Fe solid solution, has a body centered cubic lattice. Known as ferrite or alpha solid solution, represented by alpha or F, a commonly used in phase diagram mark. The sub eutectoid composition of austenite by Pro eutectoid ferrite precipitation formation.

Ferritic steel grade number in DIN17455: 1.4512, 1.4016, 1.14510

Definition of austenite

Austenite is a lamellar microstructure of steel, usually ɣ- A nonmagnetic solid solution with a small amount of carbon dissolved in Fe, also known as Vostite iron or ɣ- Fe.The characteristics of austenite are great plasticity, low strength, good toughness and no ferromagnetism. Because austenite has face centered cubic lattice and octahedral interstices is large, it can contain more carbon element than ferrite.

Austenitic steel grade number in DIN17455:1.4301, 1.4306, 1.4311, 1.4541, 1.4550, 1.4401, 1.4404, 1.4571, 1.4429, 1.4435, 1.4436, 1.4439

The stainless steel pipes we offered can meet the following requirements, and you can buy them at ease.

1.The tubes shall be straight, and the both ends shall be at right angles to the tube axis for practical purposes.

2.The internal and external surfaces of the tube shall be finished smoothly and free from defects detrimental to use.

3.The external surface of the part where weld bead was removed shall be smooth along the contour of the tube.

4.The tube may be repaired by grinding, machining or other method, provided that the wall thickness of the product after repair shall be within the specified tolerance on wall thickness. The surface of the repaired part shall be smooth along the contour of the tube.

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