Category Archives: News

MSL set to acquire Indonesian mining firm

ET reported that Maharashtra Seamless Limited is in the race to acquire an Indonesia based iron ore mining firm for around INR 300 crore. It is learnt that the Indonesian firm has iron ore reserves of close to 20 million tonne. If the deal goes through, Maharashtra Seamless would also establish a 1 million tonne steel plant close to the iron ore deposits in Indonesia with investments of up to INR 1,200 crore.

Company sources said that it would resort to internal accruals to fund the proposed steel project as well as the acquisition. As part of the backward integration initiatives, it had planned to set up its first steel plant in Orissa. However, if the deal with the mining firm goes through, the plant would instead come up in Indonesia considering the proximity to iron ore reserves.

According to the industry sources, the acquisition of the Indonesian iron ore mining company would help MSL meet iron ore requirements for its proposed steel plant. The steel plant, in turn, would serve as a raw material source for company’s seamless pipes and tubes business.

Maharashtra Seamless plans to add another 150,000 tonne by de bottlenecking the existing capacity of 3.5 million tonnes, located at Raigad in Maharashtra, with an additional investment of close to INR 100 crore. Presently, MSL supplies wide range of pipes and tubes to various domestic industries, primarily oil and gas, for exploration activities. brought to you from steelguru.com

ArcelorMittal announced JV in China

ArcelorMittal the largest Steel producer in the world announced on Friday that they would launch a flat carbon steel JV partnership with Hunan Valin Group and Hunan Valin Steel.   Hunan Valin Steel will own 34 percent in the new joint venture while ArcelorMittal and Hunan Valin Group will each have a 33 percent stake.   This new joint venture will have an annual production capacity of 1.2 million tonnes of flat carbon steel, that will be used mostly for automotive applications.  Products will include cold rolled steel, galvannealed steel and pure zinc galvanized steel.

May 2008 US Imports Down 18 Percent vs. April

A report by the American Iron and Steel Institute was released today showing that there was a 18% decline in may, 2008 steel imports over april, 2008.  The U.S. importred a total of 2,451,000 (NT) of steel in may 2008, including 1,998,000 (NT) of finished steel.  For the first 5 months of 2008 total and finished steel imports are down by 11% and 14%, respectively vs the same period in 2007.  However, in the most recent 3 months March-May 2008 is up 10% vs the monthly average in the previous 3 months (Dec. 2007 - Feb. 2008)

U.S. Steel Imports May 2008

Total and finished steel imports on an annualized basis this year are down 5 percent and 6 percent, respectively, vs. 2007. On an annualized basis, total imports of steel in 2008 would be 31.6 million NT. Key products with large increases in May compared to the month before include: Sheet & Strip Galvanized Hot Dipped (up 89%), Oil Country Goods (up 21%), Heavy Structural Shapes (up 15%) and Cold Rolled Sheets (up 10%). For the first five months of 2008, products showing significant increases vs. the same period in 2007 included Oil Country Goods (up 17%) and Line Pipe (up 16%).

 

  U.S. May 2008 finished steel imports by country of orgin

For May, the largest volume of finished steel imports from offshore was from China (287,000 NT, up 59% from April), which recorded its highest monthly volume of the year. Much of this tonnage was in high-value steel products still receiving government export tax rebates (e.g., OCTG, line pipe and hot-dipped galvanized sheet). Other major offshore suppliers in May included South Korea (199,000 NT, down 6% from April), Japan (118,000 NT, down 30%), India (96,000 NT, up 16%) and Germany (81,000 NT, down 44%). Below is a summary chart of finished imports by country.

ASTM A710 Grade B

ASTM-A710-GRADE-B-STEEL

ASTM A710 Grade B the name of a high-performance structural steel A copper-precipitation-hardened, high-performance Grade 70 weathering steel and was developed at Northwestern University with the support of the Federal Highway Administration, the Illinois Department of Transportation, and Northwestern University’s Infrastructure Technology Institute.

The steel is not only stronger then conventional high-performance structural steel it is also cheaper and easier to make and needs less maintenance than conventional high-performance structural steel. The steel was designed to achieve a minimum of 70 KSI yield strength on air cooling from hot rolling without quenching and tempering (Q&T), accelerated cooling or thermomechanically-controlled processing (TMCP).

This allows for the elimination of alloying elements needed for hardenability as well as low carbon content, resulting in a very low carbon equivalent for welding. As a result, its processing cost is less than for Q&T or TMCP steels. For steelmakers, this means that special equipment for Q&T or TMCP is not required.

ASTM A710 Grade B steel possesses high Charpy absorbed impact fracture energies at really low temperatures. By the addition of titanium (up to 0.1%) which combines with interstitial atoms, the absorbed impact fracture energy further increases. This addition lowers the yield stress to 60 Ksi minimum but increases the Charpy Absorbed Impact Fracture Energy to more than 265 ft-lbs at -80oF

Because of its very low carbon equivalent, ASTM A710 Grade B steel typically does not require pre-heat or post-heat amid welding with matching welding consumables. Weatherability of ASTM A710 Grade B steel is more suitable than that of any other commercially available weathering steel. Paint on this steel resists degeneration much better than on other weathering steels.

This steel does not contain the intended additions of chromium. This is of interest because of health and environmental hazards due to the accumulation of carcinogenic Cr+6 well welding.

The combination of these properties can result in significant cost savings when this steel is used instead of other structural steels.

This form of steel has been around for a couple of years now ASTM A710 Grade B steel was used in 2000 to retrofit the I-55/I-64/I-70/US-40 Poplar Street Bridge Complex over the Mississippi River, East St. Louis, Illinois.   High strength steel was required for the retrofit because of weight limitations and for the high fracture energy that was required for seismic redundancy.

In 2006 this steel was used for the construction of a bridge in Lake Villa, Illinois. For the north Milwaukee Avenue Bridge, 500 tons of steel plates were produced and fabricated into girders. The bridge was not painted, resulting in significant savings in construction and maintenance costs.

ASTM A710 Grade B steel can be used in applications that require high strength, good fracture toughness at low temperatures, easy welding, good weather ability, and corrosion resistance. These potential applications include:

  • bridges
  • ships
  • tank cars
  • pipelines
  • oil platforms
  • guard rails and sign poles
  • tall buildings for wind and seismic resistance
  • power and illumination towers
  • construction and mining equipment

Also Because of ASTM A710 Grade B50 Tensile strength and ductility in both longitudinal and transverse rolling directions, making modified ASTM AT10 Steel very suitable for light poles, highway structures, tubing, and signal structures just any application requiring weather steel plates.

Due to the simple process involved in manufacturing,  ASTM A710 Grade B is produced at a lower cost than other competing for high-performance steels.  Weathering resistance, corrosion properties are among the best of any construction steel and have great fracture toughness, especially in cryogenic temperatures. 

To reiterate ASTM A710 Grade B50 steel is excellent for infrastructure applications such as bridges, signs, railings, posts, etc. and many other fields.

ASTM A710 Grade B 1
foto from vandal steel

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