JSFastool's 1.4529 super duplex steel cap nut is forged from ASTM A182 F55 special alloy, with a yield strength of ≥550 MPa, offering a lifespan three times longer than 304/316 stainless steel. The innovative micro-pore sealing technology (Patent No. ZL2023 8 056789X) achieves IP68-rated permanent waterproofing, providing a lifetime maintenance-free thread protection solution for extreme environments such as subsea valves, chemical plant reactors, and LNG storage tanks.

Addressing Four Major Industrial Pain Points

✅ Corrosion failure of bolts on offshore platforms

Chloride ion resistance exceeds national standard GB/T 17848 by 50 times

7 years of zero replacement records on the Bohai oil and gas platform 115

✅ Chemical medium penetration into threads

Nano-level microporous filling layer (permeability <0.001%)

Resistant to 98% concentrated sulfuric acid/40% hydrofluoric acid (verified by NACE TM0169)

✅ High-temperature and high-pressure seal failure

Self-compensating thermal expansion design (maintains clamping force at ΔT=300°C)

Passed ASME B16.34 2500LB seal test

✅ High maintenance costs

Lifetime lubrication-free (embedded PTFE solid lubrication film)

Magnetic identification for quick location (maintenance efficiency ↑70%)

Ideal Application Scenarios

Marine Engineering

Seawater desalination plant bolt sealing in high boric acid environments

Case Study: Replacement of 316L nuts at a 20,000-ton seawater desalination plant in the Middle East, saving $460,000 in annual maintenance costs

⚗️ Chemical Equipment

PTA reactor flange connection system

Features: Resistant to acetic acid bromide ion corrosion (GB/T 21433 certified)

⛽ Energy Facilities

LNG tank BOG compressor flanges

Performance: Ultra-low temperature impact toughness ≥100J at -162°C

Shipbuilding

Ballast tank valve fasteners

Advantages: Resistance to seawater microbial corrosion (MIC)

Incoloy 926 alloy similar brand

Incoloy 926 Chemical composition

Incoloy 926 Physical properties

Minimum value of mechanical properties of Incoloy 926 alloy at room temperature

Grade 1.4529 – The “king” of Nickel alloy in the stainless steel segment

Material 1.4529, also known as Alloy 926, is an austenitic special steel with a higher corrosion resistance than conventional chrome-nickel steel. Alloy 926 represents an enhancement

Compared to Alloy 904L (1.4539) stainless steel, with a raised molybdenum content and additional nitrogen. For this reason, the material is classified in the highest corrosion resistance class.

It is thereason why we called it the “king” of special materials in stainless steel, which is often referred to as 1.4529 HCR. Our customers particularly like to take advantage of our

Fast delivery of 1.4529 threaded rods,hex nut,flat washer.

The key properties of material 1.4529

Stainless steel 1.4529 HCR is characterized by its high resistance to local corrosion phenomena, such as crevice corrosion, pitting, or chlorine-induced stress corrosion cracking. It also demonstrates excellent mechanical properties and can be used in a wide temperature range. In contact with sulphuric or phosphoric acid, or chlorides and salts, it offers excellent resilience and resistance to wear.

Applications for 1.4529

The applications for 1.4529 in connection technology are very diverse. It is approved for use in pressure vessels at temperatures of –196° C

to 400° C and has been granted building inspectorate certification by DIBt, the technical authority for construction engineering in Germany.

It is particularly suitable for use in areas where work is carried out in which chlorides, salts and diluted sulfuric or phosphoric acids or seawater are used. For example, in the construction of swimming pools, its use is obligatory for attaching structural components.

Tragic accidents that occurred in the past due to chloride-induced stress corrosion cracking have certainly contributed to its obligatory use.