Alloy Incoloy 800 Steel Plate: Execution Standards and Specifications

International Standards

ASTM B409

Applicable to plates and strips of nickel-iron-chromium alloys for general purposes.

Specifies chemical composition, mechanical properties, and dimensional tolerances.

ASME SB-409

Specifically for plates used in pressure vessels, with additional requirements for impact resistance and non-destructive testing.

Complies with ASME Boiler and Pressure Vessel Code (BPVC) Section II.

ISO 6208

International standard for hot-rolled and cold-rolled plates of high-temperature alloys, defining surface quality and heat treatment conditions.

Common Specifications

Parameter	Range	Note
Thickness	0.5–100 mm	Cold-rolled (0.5–4 mm) or hot-rolled (4–100 mm)
Width	1000–2500 mm	Customizable up to 3000 mm
Length	2000–6000 mm	Customizable for special projects
Surface Finish	2B, BA, No.1, polished	Depending on application needs

 

 

 

 

 

 

 

 

Comparison with Other Alloys

Alloy Type	Incoloy 800	Incoloy 925	316L Stainless Steel
Nickel Content	30%–35%	42%–44%	10%–14%
Corrosion Resistance	Excellent in oxidation and medium-temperature corrosion	Superior in seawater and chloride SCC	Resistant to general acids/alkalis, poor in high-temperature oxidation
Max Service Temp.	~980°C	~500°C	~425°C
Typical Applications	High-temperature corrosion environments (e.g., furnace components, steam generators)	Marine engineering, salt fog conditions	General chemical and food equipment

Key Differences Explained:

 

Incoloy 800 balances high-temperature strength (due to Ni-Fe-Cr matrix) and oxidation resistance, making it ideal for thermal processing equipment.

Incoloy 925 emphasizes chloride stress corrosion resistance (higher Ni and Mo content), suitable for offshore and brine systems.

316L is cost-effective but unsuitable for temperatures >425°C or severe corrosion (e.g., seawater, high-Cl⁻ media).

 

 

 

 

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