09CrCuSb (ND steel) resistant to sulfuric acid low temperature dew point corrosion steel (ND steel, ND steel, 09CrCuSb steel, 09CrCuSb steel, etc.). Usually called 09 club.
09CrCuSb ND steel is a new type of steel resistant to sulfuric acid low temperature dew point corrosion developed by Shanghai Institute of materials and Xingcheng Special Steel from 1987 to 1990
ND steel is a low alloy structural steel. Compared with other steels such as low carbon steel, corten and cr1a, ND steel has excellent corrosion resistance and mechanical properties.
| C | P | S | ||||||
| 09CrCusb | <=0.10 | 0.20-0.40 | 0.35-0.65 | 0.70-1.20 | 0.25-0.45 | <=0.10 | <=0.10 | <=0.10 |
| 09CrCuSb | 390-550 | >=245 | >=25 |
Chemical composition in GB 150.2-2011
| 09CrCuSb | |||||||
| C | P | S | |||||
| <=0.12 | 0.20~0.40 | 0.35~0.65 | <=0.030 | <=0.020 | 0.70~1.10 | 0.25~0.45 | 0.04~0.10 |
In sulfuric acid of medium temperature and concentration, ND steel is passivated due to dissolution. A passivation layer rich in Cu, Cr, Sb and other metal elements is formed on the surface of ND steel, which has high sulfuric acid corrosion resistance.
| 09CrCuSb(ND steel) | 1Cr18Ni9 | A3(Q235B) | ||||
| 7.30 | 13.40 | 21.70 | 63.00 | 27.4 | 103.50 | |
| 1 | 1.84 | 2.97 | 8.63 | 3.75 | 14.11 |
ND steel pipe (09CrCuSb) shall be tested for corrosion resistance
ND steel pipe (09CrCuSb) shall be subject to corrosion resistance test. One sample shall be taken from each batch of two steel pipes, and each sample is a 10 mm long pipe section. Soak in 50% H2SO4 solution at 70 ℃ (± 2 ℃) for 24 hours. The average corrosion rate of two samples shall not be greater than 80g / ㎡ * h or 140g / ㎡ * h, and the specific index shall be indicated in the order.
09CrCuSb welding material
The carbon equivalent of 09CrCuSb is moderate, the content of S and P is not high, so its welding performance is good, preheating is not necessary during welding, and heat treatment is not required after welding ND steel special NDS electrode is used for welding.
| 19*2-4mm | 76-114 * 4-10mm |
| 25 * 2-4mm | 133-140 * 6-14mm |
| 32 * 2-5mm | 159-219 * 21-35mm |
| 38-42 * 3-5mm | 273-325 * 7-50mm |
| 51-63 * 3-5mm | 356-630 * 10-20mm |
09CrCuSb (ND steel) steel is developed for coal-fired boilers, oil-fired boilers; heat exchangers for electric furnaces, pipes, chimneys, boiler air preheaters, economizers, heat exchangers, condensing coolers, evaporators, etc. Hot-rolled steel sheets and steel pipes with excellent resistance to sulfuric acid dew corrosion.
Its superior resistance to sulfuric acid dew point corrosion and very high cost performance is the best material that can completely replace stainless steel and surpass stainless steel (in terms of sulfuric acid dew point corrosion resistance).
ND steel has great economic significance, in line with today's high efficiency, longevity and energy saving. "Green" concepts such as environmental protection and national development policy orientation.
Advantage of 09CrCuSb (ND steel)
09CrCuSb steel, is the most ideal steel for "sulfuric acid resistant low temperature dew point corrosion" at home and abroad. ND steel is widely used in the manufacture of economizers, air preheaters, heat exchangers and in high sulfur flue gas.
Equipment such as evaporators, used to resist corrosion of sulfur-containing flue gas dew point. ND steel also has the ability to resist chloride ion corrosion. The main reference index of ND steel pipe (soaked in 50% H2SO4 solution at 70 ℃ for 24 hours) is higher than that of carbon steel and stainless steel.
