Material Overview

Basic properties: 1.4529 (N08926) is a super austenitic stainless steel, a nickel-based alloy containing titanium and aluminum, with excellent corrosion resistance and high temperature stability. Its Cr content is 14.0-18.0%, Ni content is 24.0-26.0%, and it contains elements such as molybdenum and nitrogen. Its mechanical properties are better than traditional stainless steels such as 304 and 904L.

N08926 Chemical Composition (Weight %)

Physical properties

Density: 8.1g/cm³

Melting point: 1320-1390℃

Tensile strength: ≥650 N/mm²

Yield strength: ≥295 RP0.2 N/mm²

Elongation (A5%): ≥35%

Implementation standards:

National standards: ASTM B625, ASTM A240, ASTM B673, ASTM B674, ASTM B677

International names: W.Nr.1.4529, desulfurization and denitrification alloy, UNS N08926, Cronifer1925hMo, Incoloy alloy25-6Mo, NAS 255NM

Corrosion resistance and high temperature resistance: 

Outstanding resistance to pitting/crevice corrosion in halide and H₂S acidic media, and can effectively resist chloride ion stress corrosion; high temperature resistance is better than 304 stainless steel, and the operating temperature can reach 1038℃ (1900°F), and the oxidation resistance is comparable to higher grade alloys

Application fields and typical scenarios

1. Industrial field

Chemical equipment: phosphoric acid evaporator, sulfuric acid condensation system, corrosive medium storage tank

Energy and environmental protection: flue gas desulfurization device, acid gas transmission pipeline, power plant polluted cooling water system

Marine engineering: seawater purification pipeline, hydraulic hose system, offshore oil and gas extraction equipment

Special scenarios

3. Pharmaceutical and food industry: sanitary pipelines, reactors (meet high purity and corrosion resistance requirements)

3. Extreme environment: pressure vessel manufacturing at -196℃ to 400℃ (ASME certified)

Processing and heat treatment specifications

1. Hot processing

Temperature range: 1200-900℃, water quenching or rapid air cooling is required

Heating requirements: The workpiece needs to be clean and avoid contact with impurities such as sulfur and phosphorus. It is recommended to heat in a vacuum furnace or gas protection furnace

Solution treatment: After hot processing, it needs to be solution treated at 1150-1200℃ (optimal 1170℃) to improve performance

2. Cold processing

The work hardening rate is high, and high-power equipment is required; secondary solution treatment is required when the cold processing amount is greater than 15%

3. Precautions: Avoid fluctuations in oxidizing and reducing furnace gases, and the heating flame must not directly contact the workpiece

Material advantages and market information

1. Core advantages

Metallurgical stability: The nickel content is higher than that of the 18% series alloys, and the resistance to intergranular corrosion is enhanced

Certification qualifications: Passed VdTUV (196-400℃) and ASME pressure vessel certification

2. Supply and specifications

Form: bars, plates, pipes, flanges, forgings, etc., support customized processing (such as flattening, stripping)

Upgrade points compared to traditional stainless steel

Corrosion resistance: better than 316L, especially in chloride ion environment, the stress corrosion resistance is improved by more than 50%

High temperature performance: the operating temperature is about 200℃ higher than 904L, suitable for harsh working conditions

Mechanical strength: tensile strength is 15-20% higher than 904L, which can reduce the wall thickness of equipment and reduce costs