304L Stainless Steel Plate is a versatile, corrosion-resistant material that is widely used in industries ranging from construction to automotive and food processing. It is a low-carbon version of the popular 304 stainless steel, designed for applications requiring welding or exposure to high temperatures. The reduced carbon content of 304L stainless steel enhances its weldability and minimizes the risk of carbide precipitation during welding.
304L Stainless Steel Plate eliminates the trade-off between corrosion resistance and weld integrity. Its ultra-low carbon content (0.03% max) prevents sensitization in high-heat zones, making it the backbone of pharmaceutical cleanrooms, brewery tanks, and chemical reactors. With 18% chromium and 10% nickel, it resists nitric acid, urea, and chlorides better than standard 304-while remaining cost-effective for mass production.
Weld Zone Immunity
No post-weld carbide precipitation even at 450–800°C (per ASME Section VIII).
Multi-Industry Compliance
Meets FDA 21 CFR, EHEDG, and 3-A Sanitary Standards for food/pharma surfaces.
Adaptive Surface Tech
Electropolished (Ra ≤0.25µm) or passivated (Citric/Nitric acid options).
| Scenario | 304L Plate | Alternative (316L) |
|---|---|---|
| Nitric Acid (10%, 80°C) | 0.02mm/year corrosion rate | 0.05mm/year (overkill cost) |
| Weld Durability | No intergranular cracking at 15% strain | Requires post-weld heat treatment |
| Lifecycle Cost | $2.8/kg (10mm thick, annealed) | $4.5/kg (unnecessary for most media) |
| Lead Time | 7–10 days (stocked in EU/US/Asia hubs) | 14–21 days (low-volume alloy) |
1. Food & Beverage
Fermentation tanks (pH 3–12 resistant)
Conveyor belts for salty/sugary products
2. Medical Device Manufacturing
MRI machine frames (non-magnetic after annealing)
Sterilizable surgical tray components
3. Chemical Transport
Rail tanker liners for liquid fertilizers
Ethanol storage dividers
4. Architectural Longevity
Coastal balcony railings (5km+ from shore)
Underground parking ventilation ducts
Amsterdam Brewery Co.: "304L electropolished plates slashed tank cleaning time by 35%."
Singapore Pharma Hub: "Zero contamination in 200+ autoclave cycles."
Texas Chemical Logistics: "Replaced 316L in urea transport-saved $120k annually."
Q: How to restore corrosion resistance after welding?
A: Optional local passivation (20% nitric acid dip, 30min @ 50°C).
Q: Maximum operating temperature for continuous service?
A: 870°C (intermittent) | 425°C (continuous with <0.5% scaling).
Q: Can 304L replace 316L in coastal architecture?
A: Yes beyond 5km from shoreline-use 316L within 2km.
Q: Minimum order for custom passivation?
A: 500kg for citric acid | 1 ton for nitric acid treatment.
Common Surfaces
Stainless Steel Standards Comparison Table
| STS | USA | UNS | CHINA | EURONORM | RUSSIA | SWEDISH | JAPANESE | |
|---|---|---|---|---|---|---|---|---|
| GRADE | AISI/ASTM | NO | GB | NO | NAME | GOST | SS | JIS |
| 201 | 201 | S20100 | 12Cr17Mn6Ni5N | 1.4372 | - | - | - | SUS 201 |
| 301 | 301 | S30100 | 12Cr17Ni7 | 1.4310 | X 12 CrNi 17 7 | - | 2331 | SUS 301 |
| 303 | 303 | S30300 | 1Cr18Ni9MoZr | 1.4305 | X 10 CrNiS 18 9 | - | 2346 | SUS 303 |
| 304 | 304 | S30400 | 06Cr18Ni9 | 1.4301 | X 6 CrNi 18 10 | 08KH18N10 06KH18N11 |
2332 | SUS 304 |
| 304L | 304L | S30403 | 022Cr19Ni10 | 1.4307 | X 3 CrNi 18 10 | 03KH18N11 | 2352 | SUS 304L |
| 316 | 316 | S31600 | 0Cr17Ni12Mo2 | 1.4401 | X 6 CrNiMo 17 12 2 | - | 2347 | SUS 316 |
| 316L | 316L | S31603 | 022Cr17Ni12Mo2 | 1.4404 | X 3 CrNiMo 17 12 2 | - | 2348 | SUS 316L |
| 316Ti | 316Ti | S31635 | 0Cr18Ni12Mo2Ti | 1.4571 | X 6 CrNiMoTi 17 12 2 | 08KH17N13M2T 10KH17N13M2T |
2350 | - |
| 321 | 321 | S32100 | 0Cr18Ni11Ti | 1.4541/1.4878 | X 6 CrNiTi 18 10 | 12KH18N10T | 2337 | SUS 321 |
| 347 | 347 | S34709 | 0Cr18Ni11Nb | 1.4550 | X 6 CrNiNb 18 10 | - | 2338 | SUS 347 |
| 309S | 309S | S30908 | 0Cr23N13 | 1.4833 | X 6 CrNi 22 13 | 20KH23N18 | - | SUS 309S |
| 310S | 310S | S31008 | 06Cr25Ni20 | 1.4842 | X 6 CrNi 25 20 | 20KH25N20S2 | 2361 | SUS 310S |
| 416 | 416 | S41600 | Y1Cr13 | 1.4005 | X12CrS13 | - | 2380 | SUS 416 |
| 2205 | 2205 | S32205/S31803 | 00Cr22Ni5Mo3N | 1.4462 | X2CrNiMoN22-5-3 | 02Ch22N5AM2 | 2377 | SUS 329J3L |
| 2507 | 2507 | S32750 | 00Cr25Ni7Mo4N | 1.4410 | X 2 CrNiMoN 25-7-4 | - | - | - |
| 904L | 904L | N08904 | - | 1.4539 | - | - | - | - |
| 254SMO | 254SMO | S31254 | - | 1.4547 | X1CrNiMoCuN20-18-7 | - | 2378 | - |
| 253MA | 253MA | S30815 | - | 1.4835 | X9CrNiSiNCe21-11-2 | - | 2368 | - |
| 17-4PH/630 | 17-4PH/630 | S17400 | 0Cr17Ni4Cu4Nb | 1.4542 | X5CrNiCuNb16-4 | 05Ch16N4D2B | - | SUS630 |
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