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IACS UR W25

Aluminium alloys for hull construction and marine structure

Chemical composition, mechanical properties (3–50 mm) and corrosion testing of rolled and extruded 5xxx and 6xxx alloys for ships; the H116 and H321 tempers for hulls. Adopted by every IACS classification society.

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InternationalIACS UR W25

5083-H116

Marine plate for hulls: 215 MPa proof, 305 MPa tensile from 3 to 50 mm, tested against exfoliation corrosion.

ReH
≥ 215 MPa
Rm
≥ 305 MPa
From the standard
4
InternationalIACS UR W25

5083-H321

Marine plate with a strength window: proof 215–295 MPa, tensile 305–385 MPa from 3 to 50 mm.

ReH
215–295 MPa
Rm
305–385 MPa
From the standard
4
Trade sources only
2
Disagreements explained
2