Corrosion-resisting Alloy Steel Plate 

Corrosion Resistant Steel is a type of steel that is endowed with excellent corrosion resistance through alloy design, surface treatment, or special processes. It is widely used in chemical, marine, energy, construction, and other fields.

Normal Steel Grade

Grade: Cor-ten A, Cor-ten B, S355J0WP, S355J2WP, S355J0W, S355J2W, 08Cu, 16MnCu, A588M, 10CrMoAL, 16CuCr, 12MnCuCr, SMA400, SMA490, SMA570W, Fe235W, Fe355W, WR50B, WR50C and so on.

Product Feature of Corrosion-resisting Alloy Steel Plate

1. Manufactured by steel plant like: Bao Steel, Wuyang Steel, Xingcheng Steel and so on.

2. Normal specification: 2-16*1500*6000/c.

3. Commodity description: It's kind of low alloy steel which between normal steel and stainless steel. It's manufactured with the corrosion resistance element like copper, nickel based on the nomal carbon steel. It has the character of  tough, extensibility, moulding, welding and cutting, ablation, high temperature, antifatigue and so on. Its weather-proof capacity is 2-8times and coating is 1.5-10times compare to normal carbon steel. It also characters with antirust, lifetime extension, low consumption, labour saving and energy conservation. It was mainly used in the industry of railway, vehicle, bridge, tower which are exposed in the air in long time. It can be also used to manufacture container, railway vechical, oil derrick, seaport building, oil production platform which contains the corrosive medium called sulfuretted hydrogen.

Selection and Processing Points

Four elements of selection

1. Corrosive medium

-Acidic environment: Choose Mo containing stainless steel (316L) or duplex steel

-Ocean atmosphere: weathering steel/duplex steel (avoid 304)

-High temperature sulfur corrosion: 15CrMoR alloy steel

2. Mechanical requirements

-High pressure vessel: duplex steel (yield strength ≥ 450 MPa)

-Seismic structure: weather resistant steel (elongation rate>22%)

3. Cost control

-Large storage tank: Composite plate (coating thickness 2-3mm) saves 40% of cost compared to all stainless steel

-Non load bearing decoration: 430 stainless steel (low Cr, no Ni) replaces 304

4. Compliance with standards

-Food grade: GB 4806.9-2016 (migration limits for lead/cadmium)

-Nuclear power: ASME BPVC III (anti irradiation embrittlement)

Processing taboos

-Welding :

-Dual phase steel requires controlled heat input (to prevent embrittlement of the σ phase)

-The composite board is first welded to the base layer, and the cladding is transitioned using ER309L welding wire

-Surface treatment:

-Weathering steel is prohibited from being coated with ordinary anti rust paint (to prevent the rust layer from self-healing)

-Stainless steel needs to be passivated after pickling (to increase the density of the passivation film)

Frontier development trends

-High entropy alloy coating: FeCoCrNiAl laser cladding, with a 5-fold increase in seawater corrosion resistance

-Super austenitic steel: 904L (00Cr20Ni25Mo4.5Cu) resistant to concentrated sulfuric acid corrosion

-Digital Corrosion Monitoring: Steel plate embedded with IoT sensors, real-time warning of pitting depth

How to Select the corrosion-resistant steel plates

The selection of corrosion-resistant steel plates should follow the four-dimensional matching principle of "medium strength cost process":

- Universal rust prevention  → Economical weather resistant steel (for buildings/vehicles)

-Strong acid/marine  → 316L stainless steel or dual phase steel (chemical/marine)

-Extreme Environment  → Composite Steel Plate or Superalloy (Nuclear Power/Deep Sea)

Strictly adhere to welding/surface treatment specifications during processing to avoid protection failure. With breakthroughs in coating technology and alloy design, corrosion-resistant steel plates are developing towards longer lifespan and lower maintenance costs.