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Weathering steel plate
Weathering steel, best-known under the trademark COR-TEN steel and sometimes written without the hyphen as corten steel, is a group of steel alloys which were developed to eliminate the need for painting, and form a stable rust-like appearance if exposed to the weather for several years. The name is short for "corrosion resistance" and "tensile strength".
Weathering refers to the chemical composition of these steels, allowing them to exhibit increased resistance to atmospheric corrosion compared to other steels. This is because the steel forms a protective layer on its surface under the influence of the weather.
The corrosion-retarding effect of the protective layer is produced by the particular distribution and concentration of alloying elements in it. The layer protecting the surface develops and regenerates continuously when subjected to the influence of the weather. In other words, the steel is allowed to rust in order to form the protective coating.
Chemical composition of Cor-ten grades (%, besides iron) | |||||||||
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Cu |
V |
Ni |
Cor-ten A |
0.12 |
0.25–0.75 |
0.20–0.50 |
0.01–0.20 |
0.030 |
0.50–1.25 |
0.25–0.55 |
0.65 |
|
Cor-ten B |
0.16 |
0.30–0.50 |
0.80–1.25 |
0.030 |
0.030 |
0.40–0.65 |
0.25–0.40 |
0.02–0.10 |
0.40 |
The mechanical properties of weathering steels depend on which alloy and how thick the material is.
| DAZUN TESTING EQUIPMENTS |
All the equipments of DAZUN STEEL are state of art which are imported from Germany, Japan or USA to guarantee its accurancy. So for, we runed two R&D center in Shanghai and Beijing.
| DAZUN PRODUCTS CERTIFICATE |
All the certificate which are prerequisite for steel products are required by DAZUN STEEL. We have been sanctioned by 6 testing authorization center, have been certified by TUV, CE, CQC, SGS, VDE, ISO.
packing: with bundles, seaworthy packing for sea transportation ( big order in bulk; small order packed by strips or as the customers' requirement); wooden pallet or iron pallet is prerequisite for stainless products;
delivery: 7-15days after receiving unfront payment
| OUR SERVICES USED TO BE HERE |
1, immediate respond
All the customers has DAZUN STEEL full attention, we will be 24/7 on line at your services to provide the immediate and professional suggestion. DAZUN STEEL has exported to more than 50 countries in the world, 8 oversea subsidiaries is on the way as well, could provide you the immediate respond services with our sincerity.
2, professional sugession
With decades commitment, more than 90% technician has incepted the mechanical bachlor degree in DAZUN team, and almost 60% has more than 6 years' steel manufacturing and consulting experiences. Could provide you the professional suggestion with our expertise acumen.
3, short delivery period
DAZUN steel as the behemoth steel conglomerate, mainly supplied the national construction projects, so we stowed more than 10,000 tons stocks for your option, this could significantly short the supplying period.
4,strict QA/QC procedure
DAZUN STEEL as the bankable manufacturer, always cherish the quality as the lifeline, abide by the strict quality control(QC) and quality assurance (QA)procedure, inspect each piece of DAZUN products before delivery to guarantee its quality.
5, wanranty issued
In order to assure the customers, DAZUN covered the national property issurance, also sanctioned by all the different quality testing center which is imprerative, including TUV, VDE, CE, CQC, SGS, etc.
| The earliest Chinese steel manufacturing conglomerate. |
| The largest Chinese steel manufacturing facility. |
| The platform you are dancing we are constructing. |
DAZUN group is funded by state bank, delved into steel manufacturing since 2002, step in steel trading business since 2002, with more than 14 year’s commitment, DAZUN always stick to the principle: best services derived from the best quality, developed into the Chinese largest steel manufacturing conglomerate.
So for, DAZUN group invested more than 1.2billion dollars into different behemoth steel company, own of their shares, including SHANGANG, ANGANG etc. The total steel manufacturing capacity of the companies DAZUN invested achieved to more than 20million tons annually.
DAZUN invested more than 7% of annual revenue in R&D each year, co-operated two R&D center in Beijing and Shanghai with national famous university-Qinghua university. Soulrun own a professional team, thanks to their acumen, invited by national steel committee to draft the national steel manufacturing quality standard.
DAZUN count on quality as the lifeline, in order to make sure the quality guaranteed, imported the state-of-art testing machine from Germany and USA to strength the Q/A,Q/C procedure. Each piece of products supplied by DAZUN warranted by ISO9001,BV, SGS, TUV, CQC certificate etc.
| DAZUN PRODUCTION FACILITY |
| DAZUN PROSESSIONAL TEAM and HONOR |
With decades commitment, DAZUN and its expert team could use its acumen to assist customer with professional suggestion, and let the material procurement fit its purpose, make it the most of it.
All the customers has DAZUN STEEL full attention, we will be 4/7on ine at your services provide the immediate and professional suggestion. With decades commitment, more than 90% technician has the mechanical bachlor degree in SORUN team, and almost 60% has more than 6 years' steel manufacturing and consulting experiences.
DAZUN STEEL as the bankable manufacturer, always cherish the quality as the lifeline, abide by the strict quality control(QC) and quality assurance (QA)procedure, invested more than 7% of annual revenue in R&D each year, co-operated two R&D center in Beijing and Shanghai with national famous university-Qinghua university.
DAZUN STEEL and its team is granted hundreds of certificate by government and corresponding authority, own more than 20 patents so far.
| QUALITY CONTROL/QUALITY ASSUARANCE |
DAZUN STEEL always stick to the pricinple: best services derived from best quality, imported the state-of-art testing equipments from Japan, Germany and USA which guaranteed the quality. We will undertake the all the test which is imperative, such as chemical composition, hardness, stretch etc.
Each batch of products will be strictly tested by DAZUN experts before delivery. We are responsible for each of DAZUN products.
Q1: What is your terms of payment?
A: 30% T/T as the upfront deposit, 70% before delivery. We will show you the photos of products and package before you pay the balance.
Q2: what is the terms of delivery?
A: EXW, FOB, CIF, CFR, DDU
Q3: What is the terms of packing?
A: generally, we pack our goods in bundles or coils with rods or belts, we could also pack the goods as the customers’ requirement.
Q4: What is your delivery time?
A: For stocks, we could transport the goods to loading port within 7 days after we received your deposit.
For production period, it usually takes about 15 days-30 days after receiving the deposit.
Q5: Could you produce according to the samples?
A : Yes, we could customer-made by your samples or technique drawings, we could build the mold and fixtures.
Q6: Could you provide the compliment samples?
A: yes, we could provide the free samples on conditons it is available in stocks, however, the the transportation fee is borne by buyer.
Q7: How could you guarantee your products?
A: Each piece of products is manufactured by certified workshops, inspected by DAZUN piece by piece according to national QA/QC standard. We also could issue the warranty to customer to guarantee the quality.
Q8: How do we trust your company?
A: We specialise in steel business for years, headquarter locates in Qingdao, Shandong province, you are welcome to investigate in any ways, by all means, you could place an order in alibaba with trade assurance which could secure your payment.
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