Description
GB NS322 (Hastelloy B-2/UNS N10665/MA-B2)
GB NS322 Material grades and equivalents Hastelloy B-2/GB NS322/UNS N10665/SEW VDIUV W.Nr.2.4617/MA-B2
GB NS322 Chemical compostion:
Alloy |
% |
Ni |
Mo |
Fe |
Cr |
Co |
C |
Mn |
V |
Si |
P |
S |
GB NS322 |
Min. |
Balance |
26 |
4 |
0.2 |
|||||||
Max. |
30 |
6 |
1 |
2.5 |
0.05 |
1 |
0.4 |
1 |
0.04 |
0.03 |
GB NS322 Physical properties:
Density |
9.24g/cm3 |
Melting point |
1330-1380℃ |
GB NS322 Alloy minimum mechanical properties in the room temperature:
Alloy state |
Tensile strength Rm N/mm2 |
Yield strength RP0.2N/mm2 |
Elongation A5 % |
GB NS322 |
690 |
310 |
40 |
Characteristic：
-
Control of iron and chromium content to a minimum to prevent the generation of β-phase
-
Excellent corrosion resistance of restore
-
An excellent resist to concentration sulfuric acid medium and large number of non-oxidizing acid corrosion.
-
A very good resistance of chloride reduction of stress corrosion cracking (SCC).
-
Good corrosion resistance of various organic acids.
Metallurgical structure：
GB NS322 is the face-centered cubic lattice structure. By controlling the content of iron and chromium at the minimum to reduce the processing brittle, prevent Ni4Mo precipitation during 700-870 ℃.
Corrosion resistance：
Ni-Mo alloy Hastelloy B-2, the carbon and silicon content is extremely low, reducing the HAZ carbon and other impurities precipitation, so the weld has sufficient corrosion resistance. Alloy Hastelloy B- 2 in the reduction of medium with very good corrosion resistance, such as a various temperature and concentration of hydrochloric acid. In the middle of the concentration of sulfuric acid solution (or contain a certain amount of chloride ions) also has very good corrosion resistance. At the same time can be used to acetic acid and phosphoric acid environment. Alloy material suitable only in the metallurgical structure and pure crystal structure in order to have the best corrosion resistance.
Applied field：
Alloy Hastelloy B-2 with a wide range of applications in the field of chemical, petrochemical, energy manufacturing and pollution control , particularly in the sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid, and other industries.
Specifications：
Plate, Sheet, Strip |
ASTM B333, ASME SB333 |
Bar |
ASTM B 335, ASME SB335, (DUAL CERTIFIED TO ASTM B564, ASME SB564ON 3-1/2 DIA. AND UP) |
Welded Pipe |
ASTM B619, ASME SB619, CLASS I or II, (ABOVE 8 SCH 40) ASTM B775,ASME SB775 |
Seamless Pipe |
ASTM B622, ASME SB622 |
