Stainless steel refers to the corrosion resistance of air, steam, water and other weak corrosive medium, and acid, alkali, salt and other chemical etched medium corrosion of steel, also known as stainless acid resistant steel.It was widely used in various areas,including building,tableware,household appliance,industry,etc.According to metallurgical structure,stainless steel was divined into three varieties,including authenticate stainless steel,ferric stainless steel and martensite stainless steel.Based on these three fundamental categories,there are another three stainless steel in order to meet more various needs and requirement.There-into,SUS 340 belongs to the authenticate stainless steel,SUS 430 attaches to ferric stainless steel and SUS 410,420 go with martensite stainless steel.Here are some difference between them.
1.430 vs 304
First of all,the chrome content of SUS 430 is reaching to 16%-18% and basely don’t have nickel.And SUS 304 contains both of them.So,SUS 304 possesses better decay resistance.Due to different structure,the toughness of SUS 304 is higher than SUS 430.
What’s more,SUS 430 is mainly used in the region of building decoration,household appliance ,fuel burner component.And SUS 304 was broadly used in the trade of industry,furniture decoration and foodstuff and health.At first,SUS 304 was invented to resist hostile environment,such as coast area,cold and damp place.SUS 430 was more inclined to use in high temperature environment,like boiler,hot-water cylinder,hot supplying system,etc.
1.410 vs 420 vs 430
410 — hardness and good abrasion resistance
420 — Prop grade” martensite steel, similar to brilliantine high chromium steel, the earliest stainless steel, was also used in surgical knives and could be made very bright.
430 — generally as decorative purpose,having excellent formability,but existing poor temperature and corrosion resistance
There are three principle elements affecting the cause of stainless steel rust.
The content of alloying element
Generally,it’s hard to rust if the content of chromium nearly reach to 10.5%.That is to say,the higher the content of chromium,the better the corrosion resistance.For example,normally,the content of nickel close to 8%-10% and the content of corrosion approach to 18%-20%,the SUS 304 will not rust.
Smelting process of production enterprise
Due to excellent smelting technology,advanced equipment ,the control of alloy element and billet cooling temperature and removal of impurities can be well guarantee by large stainless steel factory.Therefore,the quality of product is excellent and not easy to rust.
Protection environment
The environment having dry climate and ventilated circumstance is hard to rust.And the area having large air humidity ,successive rainy weather,huge pH in the air is easy to rust.
Corresponding diverse purpose ,every stainless steel has its own shortcoming and length,applying various industries.
Post time: May-15-2023