SS 904L Alloy Austenitic Stainless Steel Strip
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SS 904L Alloy Austenitic Stainless Steel Strip–Grade 904L (UNS N08904, EN 1.4539,China 00Cr20Ni25Mo4.5Cu,JIS SUS890L) is a highly alloyed, low-carbon austenitic stainless steel that offers excellent corrosion resistance in dilute acids and is specifically designed for environments with harsh corrosive conditions.
【Product Type】: Stainless steel strip
【Specification Range】:
Thickness: 0.03mm–3.0mm
Width: 1.0mm–2000mm
【Tolerance Range】:
Standard: ±0.05mm; Precision: ±0.01mm
【Hardness Range】: 140–620 HV
(ANN, 1/2H, 3/4H, H, EH, SH)
【Surface Finish】:
TR, 2B, BA, 2BB, HL, Polished, 4K, 6K, 8K (Mirror)
【Material Standards】:
GB (China), JIS (Japan), ASTM/AISI (USA), DIN (Germany), etc.
Acidic environment
Seawater corrosive environment
Highly corrosive acidic food environment
in processing equipment for substances such as high-concentration citric acid and acetic acid
Environments requiring durability and a distinctive texture.
Chemical composition of 904L (%):
C ≤ 0.03,
Si ≤ 1.00,
Mn ≤ 2.00,
P ≤ 0.035,
S ≤ 0.03,
Ni: 23.0–25.0,
Cr: 18.0–20.0,
Mo: 3.0–4.0,
Cu: 4.0–5.0
The Rolls-Royce of Stainless Steel—904L Super-Austenitic Stainless Steel
| Comparison Item | 304 Stainless Steel | 316L Stainless Steel | 2205 Duplex Stainless Steel | 904L Super Stainless Steel |
| PREN | ≈18 | ≈24 | ≈34 | ≈35–40 |
| Dilute Sulfuric Acid Resistance | Poor | Good | Moderate | Excellent |
| High-Temperature Saltwater | Poor | Relatively Poor | Good (≤300°C) | Good |
| Machinability | Easy | Easy | Relatively Difficult | Most Difficult |
| Indicative Purchase Price | ~RMB 15,000/t | ~RMB 17,000/t | ~RMB 22,000/t | RMB 25,000–50,000/t |
☑ Dilute Sulfuric Acid / Phosphoric Acid Media
(Concentration <10%, Temperature <80°C)
☑ High-Temperature Concentrated Saltwater
(Chloride Ions + High Temperature)
☑ 316L Shows Frequent Pitting / Crevice Corrosion in Acidic Media
☑ Pulp Bleaching, Pharmaceutical Heat Exchangers, Chemical Pickling
☑ High Strength + Weight Reduction Design
(Choose 2205)
☑ General Atmosphere / Food / Decoration
(Choose 304 or 316L)
☑ Extremely High-Temperature & High-Chloride Environments
(Choose 254 SMO or Nickel-Based Alloys)
Misconception 1：
Incompatible
Misconception 2：
Misconception 3：
Non-Compliant Use in Food & Kitchen Applications，
Copper content is restricted under certain food-contact standards.
Misconception 4：
Costly and potentially non-compliant
Misconception 1：
Overkill for Architectural Decoration
Misconception 2：
Extremely expensive with little cost-effectiveness.
304 or 316L would be more appropriate.
Misconception 3：
Exceeding the Limits in Extreme Service Conditions，
High Chloride + High Temperature + High Pressure
Misconception 4：
904L also has its limits — consider 254 SMO for more severe conditions.
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