Acid Resistant 904L Stainless Steel Tubing High Molybdenum
Product Details
Acid Resistant 904L Stainless Steel Tubing
,904L Stainless Steel Tubing High Molybdenum
The Acid-Resistant Stainless Steel Tubing is specifically engineered to withstand highly aggressive acidic environments, including sulfuric, hydrochloric, nitric, phosphoric, and organic acids. Manufactured from high-performance austenitic and duplex stainless steel grades with elevated chromium, nickel, and molybdenum content, this tubing provides exceptional resistance to general corrosion, pitting, and intergranular attack. Its seamless construction ensures uniform wall thickness and eliminates weld-related vulnerabilities, making it the reliable choice for acid handling systems in chemical processing, mining, and industrial applications.
| Parameter | Details |
|---|---|
| Standards | ASTM A269, A213, A312; EN 10216-5; ASME SA213 |
| Available Grades | 316L, 317L, 904L, 254SMO, Alloy 20, Duplex 2205, Super Duplex 2507 |
| Outer Diameter | 3 mm – 219 mm |
| Wall Thickness | 0.5 mm – 12 mm |
| Length | Fixed lengths 3m / 6m, or custom lengths upon request |
| Manufacturing Process | Seamless – Cold drawn / Cold rolled |
| Surface Finish | Annealed, pickled, passivated, polished |
| End Finish | Plain ends, beveled ends, or threaded |
| Grade | Cr | Ni | Mo | Cu | N | PREN* |
|---|---|---|---|---|---|---|
| 316L | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – | – | 24-26 |
| 317L | 18.0-20.0 | 11.0-15.0 | 3.0-4.0 | – | – | 29-33 |
| 904L | 19.0-23.0 | 23.0-28.0 | 4.0-5.0 | 1.0-2.0 | – | 34-38 |
| 254SMO | 19.5-20.5 | 17.5-18.5 | 6.0-6.5 | 0.5-1.0 | 0.18-0.22 | 42-45 |
| Alloy 20 | 19.0-21.0 | 32.0-38.0 | 2.0-3.0 | 3.0-4.0 | – | 28-32 |
| Duplex 2205 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | – | 0.14-0.20 | 35-38 |
PREN = Pitting Resistance Equivalent Number (Cr% + 3.3×Mo% + 16×N%). Higher PREN indicates better acid corrosion resistance.
| Grade | Condition | Tensile Strength (MPa) min | Yield Strength (MPa) min | Elongation (%) min | Hardness (HB) max |
|---|---|---|---|---|---|
| 316L | Annealed | 485 | 170 | 40 | 217 |
| 317L | Annealed | 515 | 205 | 40 | 217 |
| 904L | Annealed | 490 | 215 | 35 | 220 |
| 254SMO | Annealed | 650 | 300 | 35 | 250 |
| Alloy 20 | Annealed | 550 | 240 | 35 | 220 |
| Duplex 2205 | Annealed | 620 | 450 | 25 | 290 |
Tested in accordance with ASTM E8 / E8M.
| Grade | Sulfuric Acid (H₂SO₄) | Hydrochloric Acid (HCl) | Nitric Acid (HNO₃) | Phosphoric Acid (H₃PO₄) | Acetic Acid |
|---|---|---|---|---|---|
| 316L | Good (dilute) | Limited | Excellent | Good | Excellent |
| 317L | Very Good | Fair | Excellent | Very Good | Excellent |
| 904L | Excellent (up to 50%) | Good (dilute) | Excellent | Excellent | Excellent |
| 254SMO | Excellent | Good | Excellent | Excellent | Excellent |
| Alloy 20 | Excellent (all conc.) | Good to Very Good | Excellent | Excellent | Excellent |
| Duplex 2205 | Very Good | Fair | Excellent | Very Good | Excellent |
Always verify compatibility based on specific temperature and concentration.
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Superior Acid Corrosion Resistance – Formulated to withstand aggressive acidic media
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High Molybdenum Content – Critical for reducing acid attack in reducing environments
-
Copper Addition (904L / Alloy 20) – Enhances resistance to sulfuric acid
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High Nickel Content – Provides excellent resistance to chloride-induced stress corrosion cracking
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Passivated Surface – Optimized oxide layer for maximum acid protection
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Seamless Construction – No weld seams to initiate corrosion
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Wide Temperature Range – Maintains integrity from cryogenic to elevated temperatures
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Sulfuric Acid Plants – Acid transfer lines, heat exchangers, storage tank piping
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Phosphoric Acid Production – Reactor feed lines, evaporator tubes
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Nitric Acid Service – Concentrator columns, absorption tower piping
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Hydrochloric Acid Handling – Dilute acid transfer and storage (Alloy 20 / 904L)
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Pickling Lines – Steel mill acid recovery systems
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Chemical Tankers – Cargo piping for bulk liquid acids
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Mining & Metallurgy – Leaching circuits, acid drainage systems
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Pharmaceutical Synthesis – Organic acid process lines
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Food Processing – Citric and lactic acid handling
For inquiries, technical datasheets, or custom sizes, please contact our sales team.
Mrs. Zhongcheng Metal
Manager
- Email: zhongcheng@metalsstainlesssteel.com
- Tel: 13309216881
- WhatsApp: 13309216881
-
WeChat:
13363905196
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