C28 · Chemical Fiber
Select 316L/904L for chemical fiber manufacturing: Type and four parts list
We compiled four stainless steel parts used in the chemical fiber industry: commonly used 316L / 904L / 304, thickness from 2-30 mm.
Four Parts and Material List
| Part / Component | Recommended Grade | Specification / Thickness | Surface | Main Failure Modes | Reference Standards |
|---|---|---|---|---|---|
| Casting Bath/ Pipelines | 316L/904L | 2–8mm | 2B/Acid Pickling | Sulfuric Acid/Sodium Thiocyanate + High Temperature + Chloride → Erosion Corrosion; 904L PREN ≈ 34, 316L ≈ 25 | ASTM A240；GB/T 3280 |
| Spinner Beam/Pumps | 316L | Forged/Plate 5–30mm | Processing Surface/Laparoscopic | High-Temperature Polymer Degradation Corrosion + Wear | GB/T 3280；GB/T 1220 |
| Drawing Rolls/Heated Rolls | 316L/304 | Roll Surface 5–20mm | Mirror/Laminate Chrome | High Temperature + Fiber Wear + Solvent Corrosion | GB/T 3280 |
| Chemical Fiber Filter Core/Filters | 316L | By Filtration Precision | Pickling/Electrolysis | Pressure Drop + Clogging + Corrosion | GB/T 3280 |
Table showsStandard Configuration.For the same part, different media, temperatures, and welding methods may require 304, 316L, or 2205 —— Explain usage conditions clearly, it's easier than specifying grades.
Material Selection Tips
- Common Grades: 316L (4), 904L (1), 304 (1)
- For High Temperatures, Consider Hot Fatigue and Oxidation. Use 310S / Heat-Resistant Castings (3/4).
- Consider Hardness for Wear Parts (Cutting Edges, Liners, Conveying Components) Beyond Corrosion Resistance (2/4).
- Thickness range 2–30 mm: Thin plates are mostly formed parts (considering bend rebound and deep drawing cracking), thick plates are mostly welded structural components (considering heat input and sensitization).
Common Issues
Which stainless steel is used most in chemical fiber manufacturing?
Total pages statistics show that 316L appears the most (4 items), followed by 904L (1 item) and 304 (1 item). Specific to a part still depends on the medium and temperature, for example, a stainless steel countertop would switch from 304 to 316L if it contacts saltwater.
Which parts are most prone to problems?
Based on failure descriptions, typical examples include "boiling bath/piping": sulfuric acid/NaSCN + high temperature + Cl⁻ → pitting/groove corrosion; PREN of 904L ≈ 34, 316L ≈ 25; recommended grades are 316L/904L with specifications of 2–8 mm. For this type of condition, it's recommended to clarify medium concentration, temperature, and cleaning methods during the design phase.
What thickness should I choose?
The listed thickness range is 2–30 mm. Thin plates consider forming and surface quality, thick plates consider welding and structural strength; different manufacturers may have different values for the same part based on your drawings or operating conditions, review them accordingly.
Related Materials and Adjacent Industries
Applications4
Thickness2–30mm