Alloy 625 has excellent strength at temperatures up to 816 C. At higher temperatures, its strength is generally lower than that of other solid solution strengthened alloys. Alloy 625 has good oxidation resistance to aqueous corrosion, but is relatively moderate compared to other more capable corrosion resistant alloys.
SPECIFICATIONS
Form
ASTM
Rod,bar and wire
B 466
Plate,sheet and strip
B 443, B 906
Seamless pipe and tube
B 444, B 829
Welded pipe
B 705, B775
Welded tube
B 704, B 751
Fitting
B 366
Billet and bar for reforging
B 472
Forging
B 564
Treatment process
Alloy 625 own a very good corrosion resistance in many media, especially with excellent resistance to pitting, crevice corrosion, intercrystalline corrosion, and erode in oxide, also good resistance to inorganic acid corrosion, such as nitric acid, phosphoric acid, sulfuric acid and hydrochloric acid.
Alloy 625 can resist the alkali and organic acid corrosion in the oxidation and reduction environment. Effect resists the chloride reduction stress corrosion cracking. Normally no corrosion in the sea-water and industry environments since high corrosion resistance to the sea-water and salting liquid,as well as in high temperature, without sensitivity during welding.
Alloy 625 have the resistance to oxidation and carbonizing in the static and cycle environments, also hacve the resistance the chlorine corrosion.
Item
600
601
617
625
690
718
X750
825
C
≤0.15
≤0.1
0.05-0.15
≤0.08
≤0.05
≤0.08
≤0.08
≤0.05
Mn
≤1
≤1.5
≤0.5
≤0.35
≤0.5
≤0.35
≤1
≤1
Fe
6-10
rest
≤3
rest
7-11
rest
5-9
≥22
P
≤0.015
≤0.02
≤0.015
--
--
--
--
--
S
≤0.015
≤0.015
≤0.015
≤0.015
≤0.015
≤0.01
≤0.01
≤0.03
Si
≤0.5
≤0.5
≤0.5
≤0.35
≤0.5
≤0.35
≤0.5
≤0.5
Cu
≤0.5
≤1
--
≤0.3
≤0.5
≤0.3
≤0.5
1.5-3
Ni
≥7.2
58-63
≥44.5
50-55
≥58
50-55
≥70
38-46
Co
--
--
10-15
≤10
--
≤1
≤1
--
Al
--
1-1.7
0.8-1.5
≤0.8
--
0.2-0.8
0.4-1
≤0.2
Ti
--
--
≤0.6
≤1.15
--
--
2.25-2.75
0.6-1.2
Cr
14-17
21-25
20-24
17-21
27-31
17-21
14-17
19.5-23.5
Nb+Ta
--
--
--
4.75-5.5
--
4.75-5.5
0.7-1.2
--
Mo
--
--
8-10
2.8-3.3
--
2.8-3.3
--
2.5-3.5
B
--
--
≤0.006
--
--
--
--
--
Producing Process
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