Outokumpu Smo 654

We produce ASTM/ASME Grade 304, Grade 304L,304h, 316, 316L, 316H, 316TI, 321, 321H, 309S, 309H, 310S, 310H, 410S, 2205, 904L, 2507, 254, gh3030, 625, 253MA, S30815, 317L, Type 317, 316lN, 8020, 800, 800H, C276, S32304 and others special requirement stainless steel grade.

Rigorous laboratory checks have been performed on two highly alloyed austenitic stainless steels simulating bitter service environments. These are temperature, H2S partial pressure, pH and chloride concentration. The first technology of tremendous austenitic chrome steel has been broadly utilized in many parts with none problems. However, when the temperature exceeds 35 ℃, the diploma of chlorination is excessive and there are cracks, the 6Mo super austenitic stainless-steel will fail as a result of crevice corrosion. Due to the process necessities, the temperature of some components of the crude oil cooling system can exceed 70 ℃, and the continuous time of staying at the sub temperature for greater than 24 hours every time.

With the continuous improvement of its particular welding materials, the welding efficiency of the alloy is significantly improved. In order to test the performance of the second era super austenitic stainless-steel in this respect, many simulation exams have been carried out. When the corrosion potential is excessive, the danger of native corrosion is also increased. At a relatively high corrosion potential (+ 500 MV), the crevice corrosion test was carried out in simulated seawater for 30 days, and the chloride concentration was managed at a high stage, about ppm. The experimental results show that crevice corrosion happens at about 300C for super austenitic chrome steel and nickel base alloy 625 with 6 mo, and the corrosion depth remains to be giant.

However, the crevice corrosion crucial temperature of the second generation super austenitic stainless-steel (SMO) and nickel base alloy C-276 is sort of twice as excessive. In the process of modern industrial society improvement, sustainable growth and more stringent environmental protection necessities are put within the first place.

Application:kitchware,door,decoration,elevator,water tank,etc

• The high corrosion resistance of super austenitic stainless-steel is due to its high alloying degree.
• The welding methodology additionally has a fantastic influence on the corrosion resistance of tremendous austenitic chrome steel weld metallic.
• After including 5% N2 into the shielding fuel, the critical temperature of pitting corrosion is additional elevated to boiling temperature, which is near the level of base metallic.
• The take a look at outcomes show that plasma arc welding can give the next crucial temperature of pitting corrosion even when pure argon is used without filler materials, which exceeds ninety five ℃, as proven in Fig.

Stock Thickness: 0.1-200.0mm
Production thickness: 0.5.0-200mm
Width: 600-3900mm
Length: 1000-12000mm
Grade:
200 series: 201,202
300 series: 301,304,304L,304H,309,309S,310S,316L,316Ti,321,321H,330
400 series: 409,409l,410,420J1,420J2,430,436,439,440A/B/C
Duplex: 329,2205,2507,904L,2304
Surface: No.1,1D,2D,2B,NO.4/4K/hairline,satin,6k,BA,mirror/8K

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Many industrial emissions are treated in closed-circuit manufacturing processes or in particular treatment plants, similar to industrial waste incineration vegetation. These adjustments greatly increase the risk of local corrosion and stress corrosion cracking of stainless steel, and put ahead greater requirements for supplies. High power, excessive corrosion resistance and higher processability are not solely the essential requirements of latest supplies, but in addition one of the driving forces for the event of the second generation super austenitic chrome steel.

At the identical time, the solid austenite has higher nitrogen solubility than liquid austenite. All of these laid a basis for the extra in depth software of nitrogen in austenitic chrome steel and opened up a broader prospect.

The first era of super stainless steel has been used in seawater surroundings because it came into being. It has successfully changed many odd stainless steels and solved plenty of materials corrosion issues. In phrases of corrosion resistance, although these first generation of tremendous stainless steels have larger capability, there may be still a sure gap compared with nickel based mostly alloys.

Phase Diagrams

In the early development of super austenitic stainless steel, not solely nitrogen was used, but also the content material of molybdenum was increased. In the Nineteen Seventies, a brilliant austenitic stainless steel containing 20 Cr, 15 Ni, four.5 Mo, eight Mn and zero.forty five n appeared in Sweden, which has good corrosion resistance. In the first technology of super excessive austenitic chrome steel, there is up to 6% molybdenum. Starting with this, a sequence of 6-mo tremendous austenitic stainless steels have been developed, which have good application performance. However, these first generation super high austenitic stainless steels nonetheless have corrosion problems in seawater environment with sure temperature.

We have thousands tons stock of stainless steel sheet and coil with various size and grade,mainly include austenitic stainless steel, martens stainless steel (including precipitation hardened stainless steel sheet & coil), ferritic stainless steel, and duplex stainless steel.

Characteristics of Stainless Steel Sheet and Plate:
High corrosion resistance
High strength
High toughness and impact resistance
Temperature resistance
High workability, including machining, stamping, fabricating and welding
Smooth surface finish that can be easily clean