Seawater corrosion resistance Super-ferritic stainless steel
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Producing advantage:
Equipped with large-scale, advanced and high efficient equipments, used at power station condenser have superexcellent seawater corrosion resist properties.
Characteristic:
l High Cr and Mo added, the corrosion resist properties highly then regular ferritic stainless steel.
l The corrosion resist properties as same as Ti-TA2 or super austenitic stainless steel.
l Corrosion properties-pitting corrosion PRE= 39.
l Unsensitive of stress corrosion.
Conventional Products
|
Steel grade |
Grade |
Specifications (mm) |
|
Standard |
Application |
|
|
Thickness |
Width |
|||||
|
400 series |
TTS446 |
2B/2D Surface: 0.3-3.0mm BA surface: 0.2-1.5mm |
2B/2D Surface: 1000-1280 1000-2000 BA surface: 1000-1500 |
6-15MT |
JISG4305 GB/T 3280 Q/T 067-2012 |
seawater desalination, heat-exchanger |
*Other sizes can be supply by request, BA surface width 1650mm Max.
Physical properties
|
Grade |
Density (g/cm3) |
Elastic modulus GPa |
Linear expansion coefficient 10-6/K20-100C |
Themnal conductivity W/m K 100C |
J/Kg k Specific heat 20C |
Magnetism |
|
TTS446 |
7.75 |
214 |
9.54 |
17.8 |
500 |
yes |
Chemical Composition: Mass Percentage (%)
|
Grade |
C |
Si |
Mn |
Cr |
N |
Ni |
NborTi |
Mo |
|
Standard |
0.03max |
1.00max |
1.00amx |
25.0-28.0 |
0.04max |
1.0-3.5 |
0.20-1.0 |
3.0-4.0 |
|
Testing |
0.012 |
0.30 |
0.20 |
27.6 |
0.020 |
2.0 |
0.45 |
3.8 |
Mechanical Properties
Mechanical properties at ambient temperature
|
Grade |
Yield strength RP0.2(MPa) |
Tensile strength Rm(MPa) |
Elongation A50(%) |
Hardness HV5 |
Bending test |
|
Standard |
≥450 |
≥585 |
≥18 |
≤251 |
Qualified |
|
Testing |
≥575 |
≥680 |
26 |
205 |
Qualified |
Welding Properties and Notice:
l Low carbon and Nitrigon, Cr and Mo added, high corrosion-resisted performance on welding parts.
l Difficult for Fusion wedding and etter for filler wire welding.
l Low thermal expansion coefficient-high heat conduction and small deformation after welding comparing with 304.
l Try to avoid heat imputing, otherwise result in bigger crystalline grain and influent the toughness of the plate.
l Gas protection: Argon protection is needed to avoid surface oxidization and nitrizing.
l To Avoid the contanmination of grease, otherwise carburization will occur.
l Better to use 309L or higher grade welding rod.
Research and Development Target
400 series will be our research and developing target in future. Supper ferritic stainless steel will be hightlight, and as the substitute of 304 for our aim on the direction of economic research and developing. Realize 439 and 443 product seriation, enlarge the application of decorationg industry such ad the decoration of outside roof and curtain wall. Develop the high-chromium ferritic stainless steel such as 445, 446M and so on to improve the application of 400 series.
Service Promise
l To provide consumers with the personalized designs on composition, propertiesproperty, packing, coil weight and quality certificate.
l Technical support to customers in material selection fabrication.
l Accurate and prompt delivery
l Response to customer’s claim within 24 hours.
Contact Us
Alicia (Ms.) / Sales Manager
Tel: +86-769-85325956
Fax: +86-769-82380569
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Email:[email protected]
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