1.Product Description

  904L super austenitic stainless steel is a low carbon high nickel, molybdenum austenitic stainless steel acid for the introduction of the French company's proprietary materials. It has excellent activation - passivation and conversion ability, excellent corrosion resistance, good corrosion resistance in non-oxidizing acids such as sulfuric acid, acetic acid, formic acid and phosphoric acid, and has good resistance in neutral chloride ion medium Of the anti-pitting corrosion resistance, at the same time has good resistance to crevice corrosion and stress corrosion resistance. Applicable to various concentrations below 70 ºC sulfuric acid, at any pressure under any pressure, any temperature of acetic acid and acetic acid and acetic acid in the mixed acid corrosion resistance is also very good.
     Since the 904L carbon content is very low (up to 0.020%), there is no carbide precipitation in the case of general heat treatment and welding. This eliminates the risk of intergranular corrosion that occurs after general heat treatment and welding. Due to the high chromium-nickel molybdenum content and the addition of copper, 904L can be passivated even in a reducing environment such as sulfuric acid and formic acid. High nickel content in the active state also has a lower corrosion rate. In the range of 0 to 98% pure sulfuric acid, 904L of the use of temperature can be as high as 40 degrees Celsius. In the range of 0 ~ 85% concentration of pure phosphoric acid, its corrosion resistance is very good. In the industrial process of phosphoric acid produced by the wet process, the impurities have a strong influence on the corrosion resistance. In all the various phosphoric acid, 904L corrosion resistance is better than ordinary stainless steel. In strong oxidizing nitric acid, 904L is less resistant to corrosion than high alloyed steels without molybdenum. In hydrochloric acid, the use of 904L is limited to a lower concentration of 1-2%. In this concentration range. 904L corrosion resistance is better than conventional stainless steel. 904L steel has a high resistance to corrosion resistance. In the chloride solution, its resistance to crevice corrosion is also very good. 904L high nickel content, reducing the corrosion rate in the pit and the gap. Ordinary austenitic stainless steels may be sensitive to stress corrosion in a chloride-rich environment at temperatures above 60 ° C, which can be reduced by increasing the nickel content of stainless steel. Due to the high nickel content, 904L has a high resistance to stress corrosion cracking in chloride solutions, concentrated hydroxide solutions and hydrogen sulfide-rich environments






2. Our Service For You

Pre-sale Service
1. Sample can be offered with sample charge and courier fee by buyer's side.
2. We have full stock,and can deliver within short time.Many styles  for your choices.
3. OEM and ODM order are accepted, Any kind of logo printing or design are available.
4. Good Quality + Factory Price + Quick Response + Reliable Service, is what we are trying best to offer you
5. All of our products are produce by our professional workman and we have our high-work-effect foreign trade team, you

can totally believe our service.  
6. We have 8 year experience of design, manufacture and sell lingerie, we cherish every order from our honor.
 After you choose
1. We will count cheapest shipping cost and make invoice to you at once.
2. Check quality again, then send out to you at 1-2 working day after your payment,
3. Email you the tracking no, and help to chase the parcels until it arrive you.
After-sale choose
1. We are very glad that customer give us some suggestion for price and products.
2. If any question,please contact with us freely by E-mail or Telephone.





3.FAQ

Q: What's your minimum order quantity?
A: Our minimun quantity is 500 Kg. We also can offer you samples.
Q: What's your delivery time?
A: Our normal delivery time is 7-20 days, and it depends on your quantity and items. Of course, if you need products

urgently, we also will consider arranging it firstly.
Q: What's the price of your product?
A: Our prices are based on the material grade, size, quantity and physical performance etc. So if you can offer us the

detailed information, then we can give you the best reasonable price. Also, we can do special size and color for

customers.
Q: What's your after-sales service?
A: We have two ways to handle claims by replacement and deduction. Of course, if the materialis not good used by wrong

parameter from customer, we won't be responsible.
Q: Why do you think I will want to buy from you?
A: We have advantages with 22 years of professional experiences in manufacturing & designing, advanced technology & the

first-class equipment, perfect logistics management, high-quality after-sales service and competitive price.



4. Contact us

Name: Denny Cheng
Direct line: 021-67897611
Tel: +86 18605565290
Address: 518,XINZHUAN ROAD, SONGJIANG DISTRICT, SHANGHAI, CHINA 201612
Web: shanghaibozhong.en.made-in-china.com