904L stainless steel plate

Product Overview

904L stainless steel plate is a high-alloy, austenitic stainless steel known for its exceptional resistance to strong reducing acids, such as sulfuric acid, and chloride-induced corrosion. With high levels of chromium, nickel, molybdenum, and the addition of copper, 904L provides outstanding performance in aggressive chemical environments. This material is especially suitable for use in chemical processing, oil and gas refining, and high-end equipment requiring superior corrosion resistance and durability.

Material Properties

• Excellent corrosion resistance in sulfuric, phosphoric, and acetic acids
• High resistance to pitting and crevice corrosion in chloride environments
• Good weldability and formability despite high alloy content
• Non-magnetic in all conditions
• High purity with low carbon content to avoid intergranular corrosion

Surface Finishing Options

Finish	Description	Typical Applications
No.1	Hot rolled, annealed and pickled	Pressure vessels, acid tanks
2B	Cold rolled, smooth matte finish	Process equipment, chemical components
No.4	Brushed finish	High-end architecture, design panels
BA	Bright annealed	Pharmaceutical, food equipment

Available Dimensions and Customization

Thickness	Width	Length	Remarks
3mm - 50mm	1000mm / 1219mm / 1500mm / 2000mm	2000mm / 2438mm / 3000mm / 6000mm	Custom sizes available

Chemical Composition (Typical Values)

Element	Content (%)
C	≤ 0.02
Si	≤ 1.00
Mn	≤ 2.00
P	≤ 0.035
S	≤ 0.035
Cr	19.0 - 23.0
Ni	23.0 - 28.0
Mo	4.0 - 5.0
Cu	1.0 - 2.0

Mechanical Properties

Property	Typical Value
Tensile Strength	490 - 710 MPa
Yield Strength (0.2% offset)	≥ 220 MPa
Elongation	≥ 35%
Hardness (HRB)	≤ 90

Typical Applications

• Sulfuric acid handling and storage equipment
• Phosphoric and acetic acid process systems
• Oil and gas industry piping and heat exchangers
• Desalination plant components
• Pollution control scrubbers and stack liners
• High-end architectural and industrial designs

Processing Services Available

• Plasma and waterjet cutting
• Polishing: No.4, mirror, and custom
• Heavy plate rolling and forming
• Welding preparation and machining
• Export-grade packaging and documentation

Why Choose Our Stainless Steel Plate

• Expert in rare high-alloy stainless steel supply
• Stable inventory of 904L plates in popular sizes
• Guaranteed material traceability and certifications
• Technical support for special corrosion-resistant projects

FAQs

Q: What makes 904L different from 316L?

A: 904L contains higher nickel and molybdenum content along with copper, giving it superior resistance to strong acids and aggressive environments compared to 316L.

Q: Is 904L stainless steel weldable?

A: Yes, 904L can be welded using standard methods. Due to its high alloy content, special care should be taken to avoid hot cracking.

Q: Do you provide material certificates?

A: Yes, EN 10204 3.1 Mill Test Certificates and other required documents are provided with each shipment.

Q: What is the maximum plate thickness available?

A: We offer 904L stainless steel plates up to 50mm thick. Custom sizes are available upon request.

Q: What are the packaging standards?

A: Plates are packed using waterproof wrapping, edge protection, and solid wooden/steel pallets to ensure safe international delivery.