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Super Austenitic 904L Castings

2026-05-06

Super austenitic 904L castings: High-alloy austenitic stainless steel castings with ultra-low carbon, excellent resistance to strong acids, chlorides & pitting corrosion, ideal for extreme chemical & marine environments.

Product: Super Austenitic 904L Stainless Steel Castings

MOQ: 1 piece

Model NO: Customized

Size: As customer drawings / OEM

Tolerance: ±0.01mm

Material: 904L (UNS N08904, EN 1.4539, 00Cr20Ni25Mo4.5Cu)

Application: Chemical reactors, sulfuric acid equipment, marine & offshore, FGD systems, pharmaceutical & food processing

Surface Treatment: Solution annealing, pickling & passivation, precision machining

Process: Investment casting, sand casting, solution heat treatment (1100–1150℃ water quenching)

Factory: Direct manufacturer, 20+ years foundry experience

After-sales: 24h online technical support

Warranty: 12 months quality guarantee

Certification: ISO 9001, CE, ASTM

Standard: ASTM A351, ASME, DIN, GB

Inspection: PMI, UT/RT, hardness, pitting corrosion test, metallographic examination

Delivery Time: 20–40 days, negotiable

Packaging: Seaworthy wooden case + anti-rust coating

Advantages: Premium corrosion resistance, non-magnetic, excellent weldability, no post-weld heat treatment needed

Chemical Composition (Weight %)

Element	C	Cr	Ni	Mo	Cu	Mn	Si	P	S	N
904L	≤0.02	19.0–23.0	23.0–28.0	4.0–5.0	1.0–2.0	≤2.0	≤1.0	≤0.045	≤0.035	≤0.10

Key Features

Superior Corrosion Resistance: Excellent resistance to sulfuric/phosphoric/acetic acids, chloride pitting/crevice corrosion, and stress corrosion cracking (PREN ≥34).
Ultra-Low Carbon: ≤0.02% C prevents intergranular corrosion after welding; no post-weld heat treatment required.
High Strength & Toughness: Tensile ≥490 MPa, elongation ≥35%; maintains performance from -196℃ to 400℃.
Non-Magnetic: Fully austenitic, non-magnetic even after welding/forming.
Weldability: Good weldability with matching 904L filler metals; low heat input recommended.

Main Applications

Chemical: Reactors, heat exchangers, valves, pumps, pipes for sulfuric/phosphoric acid production.
Petrochemical: Urea plants, LDPE systems, high-temperature chloride environments.
Marine & Offshore: Seawater pumps, desalination equipment, offshore platform components.
Environmental: Flue gas desulfurization (FGD) scrubbers, wastewater treatment equipment.
Pharmaceutical & Food: High-purity processing equipment, corrosion-resistant tanks & fittings.

FAQ

Q: What makes 904L different from 316L? A: Higher Ni (25% vs 12%), Mo (4.5% vs 2%), plus Cu; 2–3* better corrosion resistance in harsh media.

Q: Can you customize per drawings? A: Yes, fully OEM customized by your drawing, size and working conditions.

Q: What is the heat treatment for 904L castings? A: Solution anneal at 1100–1150℃, water quench to maintain corrosion resistance.

Q: Do you provide PMI testing? A: Yes, 100% PMI to verify alloy composition before shipment.

Our Strengths

Professional 904L casting foundry with 20+ years experience in high-alloy corrosion-resistant parts.
Precision investment casting for complex geometries; strict process control for consistent quality.
Complete inspection lab (PMI, UT, RT, corrosion testing) to meet international standards.
Export to 60+ countries, familiar with chemical/marine project procurement.

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Super Austenitic 904L Castings

2026-05-06

Product: Super Austenitic 904L Stainless Steel Castings

MOQ: 1 piece

Model NO: Customized

Size: As customer drawings / OEM

Tolerance: ±0.01mm

Material: 904L (UNS N08904, EN 1.4539, 00Cr20Ni25Mo4.5Cu)

Application: Chemical reactors, sulfuric acid equipment, marine & offshore, FGD systems, pharmaceutical & food processing

Surface Treatment: Solution annealing, pickling & passivation, precision machining

Process: Investment casting, sand casting, solution heat treatment (1100–1150℃ water quenching)

Factory: Direct manufacturer, 20+ years foundry experience

After-sales: 24h online technical support

Warranty: 12 months quality guarantee

Certification: ISO 9001, CE, ASTM

Standard: ASTM A351, ASME, DIN, GB

Inspection: PMI, UT/RT, hardness, pitting corrosion test, metallographic examination

Delivery Time: 20–40 days, negotiable

Packaging: Seaworthy wooden case + anti-rust coating

Advantages: Premium corrosion resistance, non-magnetic, excellent weldability, no post-weld heat treatment needed

Chemical Composition (Weight %)

Element	C	Cr	Ni	Mo	Cu	Mn	Si	P	S	N
904L	≤0.02	19.0–23.0	23.0–28.0	4.0–5.0	1.0–2.0	≤2.0	≤1.0	≤0.045	≤0.035	≤0.10

Key Features

Superior Corrosion Resistance: Excellent resistance to sulfuric/phosphoric/acetic acids, chloride pitting/crevice corrosion, and stress corrosion cracking (PREN ≥34).
Ultra-Low Carbon: ≤0.02% C prevents intergranular corrosion after welding; no post-weld heat treatment required.
High Strength & Toughness: Tensile ≥490 MPa, elongation ≥35%; maintains performance from -196℃ to 400℃.
Non-Magnetic: Fully austenitic, non-magnetic even after welding/forming.
Weldability: Good weldability with matching 904L filler metals; low heat input recommended.

Main Applications

Chemical: Reactors, heat exchangers, valves, pumps, pipes for sulfuric/phosphoric acid production.
Petrochemical: Urea plants, LDPE systems, high-temperature chloride environments.
Marine & Offshore: Seawater pumps, desalination equipment, offshore platform components.
Environmental: Flue gas desulfurization (FGD) scrubbers, wastewater treatment equipment.
Pharmaceutical & Food: High-purity processing equipment, corrosion-resistant tanks & fittings.

FAQ

Q: What makes 904L different from 316L? A: Higher Ni (25% vs 12%), Mo (4.5% vs 2%), plus Cu; 2–3* better corrosion resistance in harsh media.

Q: Can you customize per drawings? A: Yes, fully OEM customized by your drawing, size and working conditions.

Q: What is the heat treatment for 904L castings? A: Solution anneal at 1100–1150℃, water quench to maintain corrosion resistance.

Q: Do you provide PMI testing? A: Yes, 100% PMI to verify alloy composition before shipment.

Our Strengths

Professional 904L casting foundry with 20+ years experience in high-alloy corrosion-resistant parts.
Precision investment casting for complex geometries; strict process control for consistent quality.
Complete inspection lab (PMI, UT, RT, corrosion testing) to meet international standards.
Export to 60+ countries, familiar with chemical/marine project procurement.

[everest_form id="249"]

[carousel_slide id='765']