TJC STEEL.
  • Home
  • Product
  • Contact
  • About
  • News

09CrCuSb: Special Nd Steel For Low Temperature Dew Point Corrosion Resistance Of Sulfuric Acid- TJC STEEL.

3/11/2021

 
​09CrCuSb -- Nd steel is a new type of low temperature dew point corrosion resistant steel with sulfuric acid which was jointly developed by Shanghai [TJC STEEL]Institute of Materials and Xingcheng Special Steel (formerly Jiangyin Steel Plant) during 1987-1990.
ND steel is a low alloy structural steel. Compared with other steels such as low carbon steel, Corten, Cr1A, etc., ND steel has excellent corrosion [TJC STEEL]resistance and mechanical properties.

Material standard
①GB 150.2-2011 "Pressure vessels -- Part 2: Materials"
②NB/T 47019-2011 "boiler, heat exchanger pipe ordering technical conditions"
③SH/T 3096-2012 "High Sour Crude Oil [TJC STEEL]Processing Equipment and Pipeline Design Material Selection Principles"

Component Specification(GB 150.2-2011)
C ≤0.12 Cr 0.70~1.10
Si 0.20~0.40 Cu 0.25~0.45
Mn 0.35~0.65 Sb 0.04~0.10
P ≤0.030 S ≤0.020

Mechanical Property
nominal thickness
(mm) strength of extension
Rm(MPa) Lower yield strength
ReL(MPa) elongation
A(%)
≤8 390~550[TJC STEEL] ≥245 ≥25

Corrosion Resistance
In the medium temperature and concentration test of sulfuric acid, Nd steel passivation due to dissolution, the surface of the steel formed a layer rich in Cu, Cr, Sb (antimony, sound: tī) and other alloy elements of the passivation [TJC STEEL]layer, and has a high sulfuric acid corrosion resistance.

▽Corrosion Rate Comparison between ND Steel and Other Steels (70℃-50%H2SO4 Solution)
type of steel corrosion rate
mg/(cm2h) multiple
ND 7.3 1
A3 103.5 14.18
Cast 63 8.63
CR1A 13.4 1.84
321 21.7 2.97
S-TEN 27.4[TJC STEEL] 3.75

For corrosion resistance, GB 150.2-2011 stipulates that corrosion resistance test shall be carried out on steel pipes. One sample shall be taken from each of two steel pipes in each batch, and each sample shall be a 10mm long pipe segment.It was soaked in H2SO4 solution with mass fraction of 50% at 70℃ (±2℃) for [TJC STEEL]24h.The average corrosion rate of the two samples is not more than 80g/m2×h or 140g/m2×h, the specific indexes are specified in the order contract.
Applications:
ND steel is the most ideal "low temperature dew point corrosion resistance of sulfuric acid" steel at home and abroad, its seamless steel pipe[TJC STEEL] is widely used in the manufacture of high sulfur flue gas service in the economizer, air preheater, heat exchanger and evaporator and other devices to resist the dew point corrosion of sulfur flue gas. 

Comments are closed.

      TJC Steel News Center

    Company News, Market News and Order Cases About TJC Steel.

    Archives

    September 2023
    August 2023
    July 2023
    June 2023
    April 2023
    March 2023
    February 2023
    January 2023
    December 2022
    November 2022
    September 2022
    July 2022
    May 2022
    March 2022
    February 2022
    January 2022
    December 2021
    November 2021
    October 2021
    September 2021
    August 2021
    July 2021
    June 2021
    April 2021
    March 2021
    February 2021
    January 2021
    December 2020
    November 2020
    July 2020
    June 2020
    May 2020
    April 2020
    March 2020
    February 2020
    January 2020
    December 2019
    November 2019
    October 2019
    September 2019
    May 2019
    April 2019
    January 2019
    December 2018
    October 2018
    September 2018
    August 2018

    Categories

    All
    Stainless Coils/ Sheets
    Steel PIpe
    Steel Plates

    RSS Feed

HOME

ABOUT

PRODUCT

NEWS

CONTACT

TJC IRON& STEEL CO.,LTD
Tel:+86-371-86107816; +8613674998777 Email: Info@tjcsteel.com
HENAN SCALE IMP&EXP CO.,LTD
ZHENGZHOU ZHIYUAN IMP&EXP CO.,LTD
Copyright © 2015
  • Home
  • Product
  • Contact
  • About
  • News