Alloy N06625 Tube

1. Standard: ASTM B444, ASME SB444, ASTM B474, ASME SB474
2. Diameters: 5.0 mm – 1219.2 mm
3. Wall thickness: 0.5 - 20mm
4. Length: Single Random, Double Random & Cut Length.

Send Inquiry

Product Introduction

ASTM B444 UNS N06625 (Inconel 625) is a high-temperature alloy based on nickel. Due to its excellent corrosion resistance, high strength and excellent high-temperature stability, it occupies an important position in high-end industrial fields such as aerospace, marine engineering, petrochemicals and nuclear energy. HT PIPE is a Inconel 625 Pipe supplier with 15+ export experience. Contact us for more information and quotes for free!

Chemical composition of Inconel 625

The chemical composition of Alloy 625 is mainly nickel (Ni) (accounting for about 58%-63%), and performance optimization is achieved by adding key elements such as chromium (Cr, 20%-23%), molybdenum (Mo, 8%-10%), and niobium (Nb, 3.15%-4.15%).

Physical and mechanical properties of alloy 625

The typical tensile strength of Alloy 625 tube at room temperature can reach more than 830 MPa, the yield strength exceeds 410 MPa, and the elongation is about 30%, showing excellent plasticity and toughness. Its density is about 8.44 g/cm³, and its melting point is between 1290-1350℃. In high temperature environment (such as below 650℃), the alloy can still maintain high creep resistance.

Material Testing of Inconel 625 pipe

Hardness Test
Chemical Analysis – Spectro Analysis
Positive Material Identification – PMI Testing
Flattening Test
Micro and MacroTest
Pitting Resistance Test
Flaring Test
Intergranular Corrosion (IGC) Test

Alloy 625 Pipe Specifications

Standard and Grades	ASTM B444 UNS N06625
625 Material types	Nickel-Chromium-Molybdenum-Columbium Alloys
Standard	ASTM, ASME, JIS, AISI, AMS, EN, SAE, DIN, NF, TOCT, DS, DTD, GB
Manufacturing types	Seamless hot rolled, annealed; Welded
Sizes	1/2" to 16"
Wall thickness	SCH10, SCH 20, SCH 40, SCH STD, SCH 80, SCH XS, SCH 160
Length	6 meters, 12 meters, or customized.

Contact now

Corrosion resistance of inconel N06625 pipe

In oxidizing media (such as nitric acid and concentrated sulfuric acid), the passivation effect of chromium makes its corrosion resistance better than most stainless steels, in reducing environments (such as hydrochloric acid and phosphoric acid), the combination of molybdenum and nickel effectively resists local corrosion (such as pitting and crevice corrosion).

High temperature performance of Inconel 2.4865 pipe

In the high temperature field, inconel 625 pipe can maintain structural stability for a long time below 980℃. Its high temperature strength mainly comes from the solid solution strengthening effect of molybdenum and niobium, and the precipitation strengthening of γ'' phase (Ni₃Nb).

Manufacturing Processing of Inconel N06625 tube

The manufacturing of Alloy 625 pipe involves precise hot and cold processing technology. Hot extrusion or hot rolling process is usually carried out at 1150-1200℃, followed by solution treatment (water quenching at about 1100℃) to eliminate processing stress and optimize grain structure. The deformation should be controlled during cold processing to avoid excessive hardening, and intermediate annealing can restore the plasticity of the material.

welding of Alloy N06625 pipe

The alloy 625 can be welded by TIG, MIG or laser welding, but matching ERNiCrMo-3 welding wire should be selected, and the interlayer temperature should be strictly controlled (recommended to be below 150℃) to prevent grain coarsening in the heat-affected zone.

Application of alloy 625 pipe

Marine Engineering: High-pressure pipelines, subsea valves and submarine pressure hulls for seawater desalination systems.

Chemical Equipment: Manufacture of sulfuric acid regeneration devices and evaporator pipelines for the chlor-alkali industry.

Aerospace: As fuel pipes and exhaust system components for aircraft engines.

Nuclear Energy Field: Used in coolant pipelines and spent fuel processing equipment for nuclear reactors.

Inconel 625 Uns N06625 Square Pipes Pressure Rating

Size	Grade	Maximum internal pressure, ksi
mm	Grade	Maximum internal pressure, ksi
		100°F	200°F	300°F	400°F	500°F	600°F	700°F
1.59 x 0.36	N06625	19.21	19.21	19.02	18.83	18.54	18.15	17.77
3 x 0.5	N06625	940	940	930	921	907	888	869
6 x1	N06625	940	940	930	921	907	888	869
8x1	N06625	681	681	675	668	658	644	630
8x2	N06625	1476	1476	1462	1447	1425	1395	1366
10x1	N06625	534	534	529	524	516	505	494
12x1	N06625	440	440	435	431	424	415	407
16x1	N06625	324	324	321	318	313	307	300

Nickel Alloy 625 Pipes Sizes

IN.	Sch	ASTM B444 inconel 625 Pipe OD	Kg/m	Pipe WT
IN.	Sch	mm	Kg/m	mm
1/4	10S	13.72	0.5	1.65
1/4	40S	13.72	0.64	2.24
1/4	80S	13.72	0.81	3.02
3/8	10S	17.15	0.64	1.65
3/8	40S	17.15	0.86	2.31
3/8	80S	17.15	1.12	3.2
1/2	10S	21.34	1.02	2.11
1/2	40S	21.34	1.29	2.77
1/2	80S	21.34	1.65	3.73
3/4	10S	26.67	1.3	2.11
3/4	40S	26.67	1.71	2.87
3/4	80S	26.67	2.23	3.91
1	10S	33.4	2.13	2.77
1	40S	33.4	2.54	3.38
1	80S	33.4	3.29	4.55
1	160	33.4	4.3	6.352)
1¼	10S	42.16	2.73	2.77
1¼	40S	42.16	3.44	3.56
1¼	80S	42.16	4.53	4.85
1¼	160	42.16	5.69	6.352)
1½	10S	48.26	3.16	2.77
1½	40S	48.26	4.11	3.68
1½	80S	48.26	5.49	5.08
2	10S	60.33	3.99	2.77
2	40S	60.33	5.52	3.91
2	80S	60.33	7.6	5.54
2	160	60.33	11.29	8.742)
2½	10S	73.03	5.35	3.05
2½	40S	73.03	8.77	5.16
2½	80S	73.03	11.59	7.01
3	10S	88.9	6.56	3.05
3	40S	88.9	11.47	5.49
3	80S	88.9	15.51	7.62
3	160	88.9	21.67	11.132)
3½	10S	101.6	7.53	3.05
3½	40S	101.6	13.78	5.74
3½	80S	101.6	18.92	8.08
4	10S	114.3	8.5	3.05
4	40S	114.3	16.32	6.02
4	80S	114.3	22.67	8.56
4	160	114.3	34.05	13.492)
5	40S	141.3	22.1	6.55
5	80S	141.3	31.44	9.53
5	160	141.3	49.87	15.882)
6	10S	168.28	14.04	3.4
6	40S	168.28	28.69	7.11
6	80S	168.28	43.21	10.97
6	120	168.28	54.75	14.27
6	160	168.28	68.59	18.262)
8	40S	219.08	43.2	8.18
8	80S	219.08	65.63	12.7
8	120	219.08	91.3	18.23
8	160	219.08	112.97	23.012)