General Information
Chemical Composition
Physical Properties
Mechanical Properties
General Information
Inconel® 625 is a nickel-based superalloy with excellent resistance to oxidation and
corrosion, in conditions ranging from jet engine propulsion systems to chemical processing of oxidizing and reducing
acids. The nickel-chromium matrix of Inconel® 625 is reinforced by the addition of molybdenum and niobium, which
is alloyed through solid solution strengthening, and this allows it to maintain high strength and toughness at
temperatures ranging from cryogenic up to 2000°F (1093°C). It is non-magnetic, austenitic, and displays high tensile
strength, fabricability, and brazeability. Due to its high nickel content, this alloy is nearly immune to chloride ion
stress-corrosion cracking and pitting, which is commonly found in metals in seawater applications like heat exchangers, fasteners, and cable sheathing.

Standard Inventory Specifications

625 Sheet, Coil and Plate:
UNS N06625
UNS N06626-625LCF
AMS 5599
ASTM B 443 Gr 1
ASME SB 443 Gr 1

625 Bar:
UNS N06625
UNS N06626-625LCF
AMS 5666
ASTM B 446

Other industry standards we comply with:

EMS95377
EN 2.4856
EN 10204
DFARS Compliant
RR SABRe Edition 2
S1000 / S-SPEC-1
GE Aviation S-SPEC-35 AeDMS S-400
PWA LCS

Common Trade Names

Alloy 625
Nickel 625
Inconel 625 (® Special Metals)
Haynes 625 (® Haynes International)

Common Applications of 625

Aerospace components
Propeller blades
Submarine propulsion motors
Utility boat exhaust ducts
Steam-line bellows

Chemical Composition

Chemical Composition of Inconel 625

Element

Percent by Weight

C

Carbon

0.010 maximum

Mn

Manganese

0.50 maximum

P

Phosphorous

0.015 maximum

S

Sulfur

0.015 maximum

Si

Silicon

0.50 maximum

Cr

Chromium

20.00 – 23.00

Ni

Nickel

Balance

Mo

Molybdenum

8.00 – 10.00

Nb

Columbium

3.15 – 4.15

Ti

Titanium

0.40 maximum

Al

Aluminum

0.40 maximum

Ta

Tantalum

0.05 maximum

Fe

Iron

5.00 maximum

Physical Properties

Density: 0.303 lb/in3 (8.44 g/cm3
Specific Gravity: 8.44
Melting Range: 2350 – 2460°F (1280 – 1350°C)
Specific Heat: 0.098 Btu/lb x °F (410 Joules/kg x °K)
Magnetic Permeability (75°F, 200 oersted): 1.0006

Thermal Conductivity

Temperature Range		Linear Coefficients of Thermal Expansion1 · 10-6		Thermal Conductivity2 3
°C	°F	/°C	/°F	W/m·K	Btu/(hr/ ft²/in/°F)
-157	-250	–	–	7.3	4.2
-129	-200	–	–	7.4	4.3
-73	-100	–	–	8.3	4.8
-18	0	–	–	9.2	5.3
21	70	–	–	9.9	5.7
38	100	–	–	10.0	5.8
93	200	12.8	7.1	10.7	6.3
204	400	13.1	7.3	12.6	7.3
316	600	13.3	7.4	14.2	8.2
427	800	13.7	7.6	15.7	9.1
538	1000	14.0	7.8	17.5	10.1
649	1200	14.8	8.2	19.0	11.0
760	1400	15.3	8.5	20.8	12.0
871	1600	15.8	8.8	22.8	13.2
927	1700	16.2	9.0	–	–
982	1800	–	–	25.3	14.6

Average coefficient from 70°F (21°C) to temperature shown

Measurements made at Battelle Memorial Institute

Material annealed 2100°F (1149°C)

Electrical Resistivity

Temperature		microhm-cm
°C	°F
21	70	128.9
38	100	129.6
93	200	131.9
204	400	133.9
316	600	134.9
427	800	135.9
538	1000	137.9
649	1200	137.9
760	1400	136.9
871	1600	135.9
982	1800	134.9
1093	2000	133.9

Mechanical Properties

Mechanical Properties and Yield Strength
Mechanical Properties and Yield Strength of Alloy 625

Temperature		0.2% Yield Strength		Ultimate Tensile Strength		Elongation Percent
°F	°C	psi	MPa	psi	MPa
1920	1065	63, 000	430	136, 000	940	51.5

625 Pipes
625 Fittings
625 Bars
625 Sheets & Plates
625 Coils & Strips
625 Wires

625 Seamless Pipe
Standard: ASTM, JIS, DIN, EU…
Grade: 625…
Size: OD: Φ4-Φ1219mm; WT:…
Introduction: Wisine its production capacity of stainless steel seamless pipe, roughly 2100 tons per month. As per your requirement…