Weather Resistant Steel Plate

Weather Resistant Steel Plate Description

Weather resistant steel is a low alloy steel. Different from ordinary steel, weather resistant variant steel forms a protective oxide film called ‘patina’ in a appropriate environment. This oxide layer seals the surface and reduces corrosion loss. Weather resistant steel is also referred as weathering steel in market. This type of steel is widely used in construction of bridges and other iconic and architectural structures. The famous bridges like New River Gorge bridge is made of weathering steel.

Weathering steel plate’s weather ability is common carbon steel plate’s twice to 8 times, coating performance is common carbon steel plate’s 1.5 to 10 times. Meanwhile, weather resistant steel plate owns anti- rusty ability, which can expand the service life for steels.

Available grades:

Standard	Steel Grade
CORTEN	Corten A	Corten B
ASTM A588/A588M	A588Grade A	A588Grade B	A588Grade C	A588Grade K
ASME SA588/SA588M	SA588Grade A	SA588Grade B	SA588Grade C	SA588Grade K
EN 10025-5	S235J0W	S235J2W	S355J0WP	S355J2WP
	S355J0W	S355J2W	S355K2W
EN 10155	S235J0W	S235J2W	S355J0WP	S355J2WP
	S355J0W	S355J2G1W	S355J2G2W	S355K2G1W
	S355K2G2W
TB/T 1979	08CuPVRE	09CuPTiRE-A	09CuPTiRE-B	09CuPCrNi-A
	09CuPCrNi-B	05CuPCrNi
GB/T 4171	Q295GNH	Q355GNH	Q265GNH	Q235NH
	Q310GNH	Q295NH	Q355NH	Q415NH
	Q460NH	Q500NH	Q550NH
JIS G 3114	SMA400AW	SMA400BW	SMA400CW	SMA400AP
	SMA400BP	SMA400CP	SMA490AW	SMA490BW
	SMA490CW	SMA490AP	SMA490BP	SMA490CP
	SMA570W	SMA570P
JIS G3125	SPA-H	SPA-C
A242/A242M	A242 Type 1	A242 Type 2	A242 Type 3	A242 Type 4
	A242 Type 5

Restrictions on Use:

Weather resistant steel is not suitable for the following environments:

where there is an atmosphere of concentrated corrosive/industrial fumes or with pollution classification above P3 to ISO 9223 (SO2 > 250 μg/m3 or 200 mg/m2 per day). where steel-work is continuously wet or damp the protective layer does not form causing steel rusts in the same way as ordinary carbon steel.

where steel is exposed to high concentrations of chloride ions or salt spray like environment having a salinity classification greater than S2 to ISO 9223 (Cl > 300 mg/m2 per day) therefore caution is needed when considering use within 2 km of coastal line.

where the use of de-icing salt is likely to lead to substantial deposits of chloride on steel surfaces. Where salt laden water would flow directly over the steel or where salt spray from roads would settle under wide bridges when ‘tunnel-like’ conditions are created.

if steel is buried in soil or under soil.

where the headroom to steel over water is less than 2.5 m. Weather resistant steel is suitable for over bridges at standard minimum headroom of 5.3 m.