Steel Knowledge · Published grades
Understand steel grade designations before you buy.
Learn what common structural and pressure-tube steel grades mean, how their specifications differ and why a grade alone never proves interchangeability or product compliance.
Structural hollow-section grades
Materials encountered in structural CHS, SHS and RHS products.
S355J2H · 1.0576
Structural hollow-section steel grade
S355J2H is a steel grade designation encountered in structural hollow sections. It describes a material, not by itself the manufacturing process or the full product specification.
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S355NH · 1.0539
Normalised or normalising-rolled structural hollow-section steel
S355NH is a structural hollow-section grade associated with a normalised or normalising-rolled delivery condition in applicable product specifications.
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S355NLH · 1.0549
Structural hollow-section steel with specified toughness class
S355NLH belongs to a structural hollow-section material family with a distinct delivery and impact-toughness designation.
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Pressure steels for elevated-temperature service
Grades used in applicable seamless and welded pressure-tube product specifications.
P235GH · 1.0345
Pressure steel for elevated-temperature service
P235GH is a steel grade used in products designed for pressure applications where specified elevated-temperature properties may be required.
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P265GH · 1.0425
Pressure steel grade P265GH
P265GH is commonly specified for pressure-bearing steel products where elevated-temperature properties are important.
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16Mo3 · 1.5415
Molybdenum-alloyed pressure-service steel
16Mo3 is a molybdenum-alloyed steel encountered in elevated-temperature pressure applications, including applicable seamless tube product ranges.
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Pressure-tube grades for room-temperature service
Separate material grades from their TR1 and TR2 quality designations.
P235TR1 · 1.0254
Pressure-tube steel quality TR1
P235TR1 denotes a pressure-tube grade for applications with specified room-temperature properties and TR1 quality requirements.
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P235TR2 · 1.0255
Pressure-tube steel quality TR2
P235TR2 denotes a specified TR2 quality of pressure-tube steel used for room-temperature applications.
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P265TR1 · 1.0258
P265-series pressure-tube steel quality TR1
P265TR1 is a pressure-tube material designation with room-temperature properties and TR1 quality requirements.
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P265TR2 · 1.0259
P265-series pressure-tube steel quality TR2
P265TR2 describes the TR2 quality variant of the P265 pressure-tube steel family, used in relevant room-temperature pressure-tube specifications.
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