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N08020 Alloy Plate Technical Manual
- Superior Corrosion Resistance: Excellently withstands sulfuric, phosphoric, and chloride environments, with outstanding resistance to stress corrosion cracking (SCC) and pitting.
- High-Temperature Stability: Maintains mechanical integrity at temperatures up to 550°C.
- Ease of Fabrication: Compatible with welding (TIG/MIG), hot/cold forming, and machining.
- Low Carbon Content: Minimizes carbide precipitation during welding, ensuring corrosion resistance.
Chemical Composition (wt%)
Element | Content Range |
C (Carbon) | ≤0.07% |
Si (Silicon) | ≤1.0% |
Mn (Manganese) | ≤2.0% |
P (Phosphorus) | ≤0.045% |
S (Sulfur) | ≤0.035% |
Cr (Chromium) | 19.0–21.0% |
Ni (Nickel) | 32.0–38.0% |
Cu (Copper) | 3.0–4.0% |
Mo (Molybdenum) | 2.0–3.0% |
Ti (Titanium) | 0.6–1.2% |
Property | Value/Range |
Density | 8.08–8.14 g/cm³ |
Hardness (HB) | 135–220 |
Yield Strength | ≥240 MPa |
Tensile Strength | ≥550 MPa |
Elongation | ≥30% |
Melting Point | 1370–1400°C |
I. Performance Characteristics
Corrosion Resistance: Designed to withstand sulfuric acid, phosphoric acid, nitric acid, and mixed acids, with a corrosion rate of ≤0.05 mm/year (concentrated sulfuric acid).
Mechanical Properties: Tensile strength ≥620 MPa, elongation ≥30%, hardness ≤HB 200, combining lightweight design (density 8.08 g/cm³) with high strength.
Stability: Austenitic structure and niobium inhibit intergranular corrosion. Operating temperature range -50°C to 200°C. Thermal conductivity 12.5 W/(m·K).
II. Core Applications
Chemical Industry: Sulfuric acid concentrators, phosphoric acid reactors, nitric acid purification towers.
Pharmaceutical Industry: Organic synthesis reactors, high-purity chemical liquid transfer pumps (resistant to acetic acid/hydrochloric acid mixtures).
Energy: Desalination pipelines, nuclear power plant heat exchangers (resistant to chloride ion stress corrosion).
III. Expanded Applications
Food processing pickling tanks, offshore platform components, and petrochemical acid storage tanks.
Surface Treatment
- Pickling: Nitric-hydrofluoric acid mixture for oxide removal (similar to SUS 304).
- Passivation: Enhances corrosion resistance in aggressive environments.
Why Choose Us ?
- Certified Standards: ASTM B463, ASME SB463, ISO 9001 compliance.
- Customized Sizes: Thickness 0.5–100mm, width ≤2500mm.
- Quality Control: 100% ultrasonic testing and material traceability.
Applications & Industries
Aerospace:
High-power density actuators.
Electronics:
Precision sensors & MEMS components.
Energy:
Magnetic coupling devices for turbines.
Frequently Asked Questions
Q1: Can N08020 be used in hydrochloric acid?
A: Limited to dilute HCl; concentrated HCl requires alternative alloys.
Q2: Is post-weld heat treatment necessary?
A: Not required due to low carbon content.
Q3: Can N08020 be used in seawater?
A: Suitable for brackish water but not recommended for full marine exposure due to limited pitting resistance.
Q4: What are the temperature limits for N08020 plates?
A: Recommended for ≤50°C in sulfuric acid; mechanical properties remain stable up to 800°C (short-term exposure).
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