Material Properties

Technical specifications for hot-rolled structural steels with enhanced atmospheric corrosion resistance

Category: Structural steel

Document reference: EN 10025-5:2019

Document title: Hot rolled products of structural steels - Part 5: Technical delivery conditions for structural steels with improved atmospheric corrosion resistance

This specification outlines the technical delivery conditions for hot-rolled structural steels alloyed with specific mass fractions of elements such as copper, chromium, nickel, and phosphorus. These alloying additions promote the formation of a stable, self-protecting oxide layer (patina) upon cyclical exposure to wet and dry ambient conditions. The standard details required yield strength, ultimate tensile strength, and low-temperature impact energy limits. By reducing the base metal corrosion rate, these weathering steels frequently eliminate the requirement for applied surface coatings. They are specified for exposed bridges, facades, and transmission towers where maintenance access is restricted or for aestetics and local environmental conditions support stable patina development.

Atmospheric corrosion resistant steels providing more resistance to atmospheric degradation in unpainted applications.

Mechanical properties of weathering structural steels with improved atmospheric corrosion resistance

Steel Grade	t ≤ 3 mm		3 < t ≤ 16 mm		16 < t ≤ 40 mm		40 < t ≤ 63 mm		63 < t ≤ 80 mm		80 < t ≤ 100 mm		100 < t ≤ 150 mm
Steel Grade	fy (MPa)	fu (MPa)	fy (MPa)	fu (MPa)	fy (MPa)	fu (MPa)	fy (MPa)	fu (MPa)	fy (MPa)	fu (MPa)	fy (MPa)	fu (MPa)	fy (MPa)	fu (MPa)
S235J0W	235	360	235	360	225	360	215	360	215	360	215	360	195	350
S235J2W	235	360	235	360	225	360	215	360	215	360	215	360	195	350
S355J0WP	355	510	355	470	345	470	-	-	-	-	-	-	-	-
S355J2WP	355	510	355	470	345	470	-	-	-	-	-	-	-	-
S355J0W	355	510	355	470	345	470	335	470	325	470	315	470	295	450
S355J2W	355	510	355	470	345	470	335	470	325	470	315	470	295	450
S355K2W	355	510	355	470	345	470	335	470	325	470	315	470	295	450
S355J4W	355	510	355	470	345	470	335	470	325	470	315	470	295	450
S355J5W	355	510	355	470	345	470	335	470	325	470	315	470	295	450
S420J0W	420	520	420	500	400	500	390	500	380	500	370	500	365	460
S420J2W	420	520	420	500	400	500	390	500	380	500	370	500	365	460
S420K2W	420	520	420	500	400	500	390	500	380	500	370	500	365	460
S420J4W	420	520	420	500	400	500	390	500	380	500	370	500	365	460
S420J5W	420	520	420	500	400	500	390	500	380	500	370	500	365	460
S460J0W	460	540	460	530	440	530	430	530	410	530	400	530	385	490
S460J2W	460	540	460	530	440	530	430	530	410	530	400	530	385	490
S460K2W	460	540	460	530	440	530	430	530	410	530	400	530	385	490
S460J4W	460	540	460	530	440	530	430	530	410	530	400	530	385	490
S460J5W	460	540	460	530	440	530	430	530	410	530	400	530	385	490

Note: The properties presented on this page are based on standard specifications, which should be consulted for compliance. The information presented here is for reference purposes only.

Technical specifications for hot-rolled structural steels with enhanced atmospheric corrosion resistance

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