MATERIAL DESCRIPTION

Alloy 625 is a nickel-chromium-molybdenum alloy with additional of niobium. This provides a high strength alloy without a strengthening heat treatment. The alloy is especially resistant to pitting and crevice corrosion but also other severely corrosive environments. Service temperatures range from cryogenic to about 1000°C. High tensile, creep, and rupture strength together with outstanding fatigue and thermal-fatigue strength in addition to oxidation resistance and excellent weldability are characteristics of this alloy.

CHEMICAL COMPOSITION

WEIGHT% C SI MN S P CR NI MO NB+TA CO FE
MIN.  20,00  58,00  8,00  3,15
MAX.  0,10  0,50  0,50  0,015  0,015  23,00  10,00  4,15  1,00  5,00

Product Standards: EN 10228, ASTM B446
Approvals: NACE MR0175, NORSOK M650, NORSOK M630 MDS N01

APPLICATIONS

Alloy 625 is used in oil gas industry, marine engineering, chemical processing and pollution control equipment.

Mechanical Properties: BAR

YIELD STRENGTH
RP0.2
MPA
TENSILE STRENGTH
RM
MPA
ELONGATION
[%]
HARDNESS
[HRC]
IMPACT
CHARPY-V, -10ºC
[J]
PRE
 ≥ 350  ≥ 770  ≥ 25  ≤ 287  ≥ 46

Heat Treatment

Solution Annealed at 890 to 1080°C.

Weldability

Very good.

ALLOY 625 / UNS N06625 ROUND BAR

DESCRIPTION KG/M
12,7 mm 1.1
17 mm 2.
20 mm 2.8
25,4 mm 4.5
32 mm 6.8
38 mm 9.9
45 mm 13.8
52 mm 18.3
57 mm 22.1
61 mm 24.8
66 mm 29.
71 mm 34.5
76,2 mm 39.5
81 mm 44.7
87 mm 51.5
91 mm 56.4
102 mm 71.3
DESCRIPTION KG/M
107 mm 77.9
113 mm 86.8
120 mm 97.6
128 mm 111.4
135 mm 124.
142 mm 137.5
152 mm 158
165 mm 186
180 mm 221
185 mm 233
203 mm 281
230 mm 360
254 mm 439
280 mm 533
300 mm 613
350 mm 833