I. Material performance iteration

The performance optimization of 904L stainless steel angle steel has shifted from single corrosion resistance improvement to the technical path of comprehensive performance synergistic enhancement.

• Density is 8.24g/cm³

• Melting point is 1300-1390℃

• Tensile strength σb≥520Mpa

• Elongation δ≥35%

• Thermal conductivity is about 15.2 W/(m・K)

• Yield strength σ0.2≥215Mpa

• Specific heat capacity is optimized to 460 J/(kg・K)

• Brinell hardness is 200HB

This performance improvement enables 904L stainless steel angle steel to withstand high loads while still resisting the erosion of complex corrosive environments.

II. Application scenario expansion

1. Green energy field

904L stainless steel angle steel shows strong application potential. In the salt lake lithium extraction project of the photovoltaic industry, this material is used to make the support structure of the brine evaporation equipment. Under the dual effects of high-concentration lithium chloride solution (concentration up to 15%) and strong ultraviolet radiation, it has been running continuously for two years without obvious signs of corrosion, and its service life is more than 2 times longer than that of traditional 316L stainless steel materials.

2. Wind power equipment field

Its excellent atmospheric corrosion resistance makes it the preferred material for coastal wind power infrastructure.

3. High-end manufacturing industry

It has become a new growth pole for the application of 904L stainless steel angle steel. In semiconductor equipment manufacturing, this material is used to make the support frame of the etching cavity with its characteristics of no metal ion pollution and strong acid and alkali corrosion resistance.

III. Precautions

1. Processing and welding

• Cutting: Due to the high hardness of 904L stainless steel, it is recommended to use ceramic or cubic boron nitride (CBN) tools, control the cutting speed at 80-120m/min, and the feed rate not exceeding 0.2mm/r. At the same time, water-soluble cutting fluid should be used to reduce the processing temperature to avoid surface hardening of the material.

• Welding process: Before welding, the surface of the workpiece should be thoroughly cleaned of oil, rust and other impurities. It is recommended to use tungsten inert gas welding (TIG) or metal arc welding (MIG), and use special welding wire with a molybdenum content of ≥5% (such as ER385). During the welding process, the interlayer temperature should be controlled not to exceed 150℃. After welding, solid solution treatment can be performed to eliminate stress.

2. Surface treatment and protection

• Passivation treatment: After processing, pickling and passivation treatment should be carried out. The acid ratio is recommended to use a mixed solution of 10% nitric acid + 2% hydrofluoric acid. The treatment time is 15-30 minutes, and then rinsed with deionized water to neutral to avoid residual corrosive media on the surface.

• Coating protection: In extreme environments such as marine atmosphere and industrial acid rain, fluorocarbon coating or zinc-nickel alloy plating can be sprayed to form a double protection system to improve the corrosion resistance of the material.

3. Storage and transportation management

• Environmental control: The storage site should be dry and ventilated to avoid coexistence with corrosive substances such as salts and acid mist. It is recommended to use overhead stacking and lay moisture-proof mats at the bottom to prevent ground moisture erosion.

• Transport protection: Long-distance transportation requires wrapping with waterproof canvas to avoid direct contact between rain and seawater. For precision machined parts, they should be packed in sealed wooden boxes and filled with shockproof materials to prevent bumps and damage to the surface protective layer.

IV. Conclusion

Through the integration and innovation of nano-strengthening technology and surface coating technology, the comprehensive performance of 904L stainless steel angle steel is expected to be improved by more than 30%, and its penetration rate in high-end equipment manufacturing will continue to expand. It is expected that the global market size will exceed the 10 billion US dollar mark in the next five years.

V. About Bolaibao Metal

Bolaibao Metal keeps up with market demand and continuously promotes technological innovation. In the processing stage, it relies on advanced cutting and welding technology to accurately control the production process and retain material properties to the maximum extent; in the surface treatment stage, it uses passivation and coating technology to significantly enhance the corrosion resistance of products in complex environments. In addition, the company strictly regulates the storage and transportation process to ensure that the product quality is consistent from factory to delivery.

• Contact us for detailed information and tailored solutions!

Tel: +86 15366282159

Email: sale@bolaibao1.com

Website: www.blbszmetal.com