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Heat-resistant, weldable structural steel. 1.7335 is mainly used in plant construction. Typical products are pressure vessels, boiling and overheating pipes as well as valves. Due to the high temperature resistance, permanent application temperatures up to max. 530 ° C is possible.

Material no. as per DIN17007


Designation as per DIN17006

13Mo44 Tensile strength 450-660 N/mm²

AISI designation


Commercial name

High-temperature structural steel Temperature range -60 ... +530 °C

Area of application

Pressure vessel and steam vessel construction, collectors, heating and overheating tubes, flanges, welding necks

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