ASTM 317L Stainless Steel Plate
We offer this product and related grades with 100% factory direct pricing and free quotes available within 24 hours.
APPLICATION SCENARIOS
OUR ADVANTAGE
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Our Factory
We at Luokaiwei specialize in manufacturing ASTM 317L stainless steel plates, a molybdenum-enhanced austenitic alloy designed for extreme corrosion resistance. Unlike standard chromium-nickel steels (e.g., 304/316L), our 317L plates contain 3–4% molybdenum and a low-carbon composition (≤0.03% C), which significantly improves resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC) in chloride-rich environments like seawater, chemical processing, and offshore applications. With superior creep strength and oxidation resistance up to 870°C, these plates are engineered for demanding industrial equipment where failure is not an option.
Key Properties and Performance Advantages
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Corrosion Resistance
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Outperforms 316L in acidic, chloride-heavy media (e.g., seawater, sulfuric acid ≤5% at 38°C).
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Resists sensitization during welding due to ultra-low carbon, preventing intergranular corrosion.
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Ideal for flue gas desulfurization (FGD) systems, pulp/paper processing, and marine hardware.
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Mechanical Strength
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Higher tensile/yield strength than 304/316L: ≥480 MPa tensile, ≥176 MPa yield.
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Excellent ductility (≥40% elongation) and hardness (≤200 HV).
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Thermal Stability
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Maintains integrity in cyclic high-temp environments (up to 870°C).
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Avoid prolonged exposure to 417–816°C to prevent δ-phase embrittlement.
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Technical Specifications
Table 1: Chemical Composition (Weight %)
| Element | ASTM 317L | EN 1.4438 | JIS SUS 317L | 316L (Comparison) |
|---|---|---|---|---|
| C | ≤0.030 | ≤0.030 | ≤0.030 | ≤0.030 |
| Cr | 18.0–20.0 | 18.0–20.0 | 18.0–20.0 | 16.0–18.0 |
| Ni | 11.0–15.0 | 13.0–15.0 | 11.0–15.0 | 10.0–14.0 |
| Mo | 3.0–4.0 | 3.0–4.0 | 3.0–4.0 | 2.0–3.0 |
| Mn | ≤2.00 | ≤2.00 | ≤2.00 | ≤2.00 |
| Si | ≤1.00 | ≤1.00 | ≤1.00 | ≤1.00 |
| P | ≤0.045 | ≤0.045 | ≤0.045 | ≤0.045 |
| S | ≤0.030 | ≤0.030 | ≤0.030 | ≤0.030 |
Table 2: Mechanical & Physical Properties
| Property | ASTM 317L | 316L (Comparison) |
|---|---|---|
| Tensile Strength | ≥480 MPa | ≥485 MPa |
| Yield Strength (0.2%) | ≥176 MPa | ≥170 MPa |
| Elongation | ≥40% | ≥40% |
| Hardness (Max) | 200 HV | 217 HV |
| Density | 7.98 g/cm³ | 7.99 g/cm³ |
| Thermal Expansion | 16.0 μm/m·K (20°C) | 16.0 μm/m·K (20°C) |
Standard Dimensions & Forms
We supply 317L plates in the following ranges:
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Thickness: 1.0 mm to 400 mm
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Width: 1000 mm, 1500 mm, 2000 mm (customizable)
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Length: 3000–6000 mm (up to 12,000 mm on request)
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Forms: Hot-rolled, cold-rolled, annealed, or pickled surface finishes
Global Price Comparison (2025)
| Region | Price Range (USD/kg) | Key Influencers |
|---|---|---|
| China | $4.80–$6.20 | Volume discounts (≥100 kg), EXW/FOB terms |
| EU | $6.50–$8.50 | EN 1.4438 certification, VAT, logistics |
| USA | $7.00–$9.00 | ASTM compliance, distributor markup |
| Japan | $8.20–$10.50 | JIS SUS 317L certification |
| Note: Prices fluctuate with nickel/molybdenum raw material costs. Luokaiwei offers fixed-price contracts for bulk orders. |
Industry Applications
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Chemical Processing: Reactors, piping, and heat exchangers exposed to H₂SO₄, HCl.
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Marine Engineering: Ship shafts, valve components, offshore platform fittings.
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Energy: FGD scrubbers, absorber towers, and desalination plants.
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Oil & Gas: Subsea pipelines, wellhead parts, and high-pressure RO systems.
Why Choose Luokaiwei’s 317L Plates?
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Certified Quality: Dual compliance with ASTM A240/ASME SA-240 and EN 1.4438.
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Advanced Processing: Laser precision-cutting, grit-free pickling, and solution annealing (1010–1150°C rapid cooling).
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Global Logistics: 15-day lead time for 20+ metric tons, with DNV-GL certified packaging.
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Technical Support: Welding guidance using 8% Mo filler alloys (e.g., Inconel 625).
5 Essential FAQs
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How does 317L outperform 316L in corrosive environments?
Higher molybdenum (3–4% vs. 2–3%) provides superior resistance to chlorides, acids, and SCC. -
What is the maximum service temperature?
870°C for intermittent use; avoid 417–816°C long-term to prevent embrittlement. -
Do you provide welded fabrication services?
Yes – We use TIG welding with Nb-stabilized fillers to preserve corrosion resistance. -
Can plates be surface-treated for enhanced performance?
Options include #8 mirror polish, brushed finish, or Passivation per ASTM A967. -
What’s the lead time for 50+ metric tons to Europe?
18–22 days with pre-certified material test reports (MTRs) and RoHS compliance.
