317L Stainless Steel Plate Technical Specification

317L is a low-carbon austenitic stainless steel with enhanced corrosion resistance, especially in chloride environments. It contains higher molybdenum (3.0-4.0%) and nickel (11.0-15.0%) than 316L, offering superior performance in acidic, alkaline, and high-temperature applications. Its “L” designation ensures weldability with minimized carbide precipitation.

Chemical Composition (wt%)

Element	Content (%)
Carbon (C)	≤0.030
Silicon (Si)	≤1.00
Manganese (Mn)	≤2.00
Phosphorus (P)	≤0.045
Sulfur (S)	≤0.030
Chromium (Cr)	18.0–20.0
Nickel (Ni)	11.0–15.0
Molybdenum (Mo)	3.0–4.0
Copper (Cu)	≤0.50
Nitrogen (N)	≤0.10

Technical Parameters

Dimensions: Thickness 0.5–100mm, Width 1000–2000mm, Length 2000–6000mm (customizable).
Hardness: ≤200 HV (annealed)
Density: 7.93 g/cm³
Yield Strength: ≥176 MPa
Tensile Strength: ≥480 MPa
Elongation: ≥40%

The following is a structured description of the performance characteristics and applications of 317L stainless steel plate, divided into three sections:

1. Performance Characteristics

Low-Carbon Design: Carbon content ≤ 0.03%, reducing carbide precipitation during welding and preventing intergranular corrosion.

Corrosion Resistance: This alloy, high in chromium (18-20%), nickel (11-15%), and molybdenum (3-4%), resists pitting and crevice corrosion and is particularly suitable for chloride environments.

Mechanical Properties: Tensile strength ≥ 480 MPa, yield strength ≥ 176 MPa, and elongation ≥ 40%, offering a combination of strength and ductility.

High-Temperature Stability: Stable at temperatures between 871°C and 899°C, with strong oxidation resistance, making it suitable for thermally stressed environments.

2. Main Applications

Chemical Industry: Used in reactors, heat exchangers, pipelines, etc., resistant to sulfuric acid, chlorides, and acidic media.

Marine Engineering: Ship components, desalination equipment, and offshore platform structures, resistant to seawater corrosion and stress corrosion cracking.

Food and Pharmaceutical: Low carbon content (≤0.03% carbon) and an easy-to-clean surface make it suitable for sanitary equipment such as storage tanks and pipelines.

High-Temperature and High-Pressure Environments: Flue gas desulfurization systems and nuclear power condensers maintain stable performance under high temperatures and pressures.

3. Other Advantages

Multi-Form Supply: Can be processed into plates, bars, and tubes, suitable for precision components such as butterfly valve sleeves and printing and dyeing equipment.

Economical: Provides safety and cost-effectiveness in harsh environments, extending equipment life.