Inconel 625 Fasteners

Inconel® 625 Specifications					Inconel® 625 Specifications
Standard	Rod, Bar, Wire & Forging Stock	Plate, Sheet & Strip	Pipe & Tube	Other Product Standards
ASTM	B 446, B564	B 443	B 444, B 829, B704, B 751,B 705, B 775	B 366
ASME	SB 446, SB 564,	SB 443	SB 444, SB 829, SB 704, SB 751, SB 705, SB 775	SB 366
SAE/AMS	5666, 5837	5599, 5869, 5599	5581
ISO	9723, 9724, 9725	6208	6207,	4955A
VdTÜV	499	499	499
BS	3076NA21	3072NS21	3074NA21
EN	10095	10095
DIN	17752, 17754	17750	17751	17744

UNS N06625 Chemical Composition
Element	Pecent (%)	Description
Carbon (C)	0.10%	Max.
Manganese (Mn)	0.50%	Max.
Silicon (Si)	0.50%	Max.
Phosphorus (Ph)	0.015%	Max.
Sulfur (S)	0.015%	Max.
Chromium (Cr)	20.0% - 23.0%	Range
Niobium (Nb) + Tantalum (Ta)	3.15% - 4.15%	Max.
Cobalt (Co)	1.0%	Max.
Molybdenum (Mb)	8.0% - 10.0%	Range
Iron (Fe)	5.0%	Max.
Aluminum (Al)	0.40%	Max.
Titanium (Ti)	0.40%	Max.
Nickel (Ni)	58.0%	Min.

UNS N06625 Physical Properties
Property	Units	Standard	Metric
Density	lb/in³ \| g/cm³	0.305	8.44
Melting Range	℉ \| ℃	2350 - 2460	1290 - 1350
Specific Heat	Btu/(lb℉) \| J(kg℃)
		0℉ \| -18℃	0.096	402
		70℉ \| 21℃	0.098	410
		200℉ \| 93℃	0.102	427
		400℉ \| 204℃	0.109	456
		600℉ \| 316℃	0.115	481
		800℉ \| 427℃	0.122	511
		1,000℉ \| 538℃	0.128	536
		1,200℉ \| 649℃	0.135	565
		1,400℉ \| 760℃	0.141	590
		1,600℉ \| 871℃	0.148	620
		1,800℉ \| 982℃	0.154	645
		2,000℉ \| 1,098℃	0.160	670
Curie Temperature	℉ \| ℃	<-320	-196
Permeability at 200 Oersted (15.9 kA/m)			1.0006
Note: Specific Heat values are calculated

Mechanical Properties

True stress-true strain of round.

Nominal Room-Temperature Mechanical Properties^a

Form And Condition	Tensile Strength		Yield Strength (0.2% Offset)		Elongation	Reduction Of Area	Hardness, Brinell
Form And Condition	ksi	MPa	ksi	MPa	%	%	Hardness, Brinell
ROD, BAR, PLATE
As-Rolled	120-160	827-1103	60-110	414-758	60-30	60-40	175-240
Annealed	120-150	827-1034	60-95	414-655	60-30	60-40	145-220
Solution-Treated	105-130	724-896	42-60	290-414	65-40	90-60	116-194
SHEET and STRIP
Annealed	120-150	827-1034	60-90	414-621	55-30	–	145-240
TUBE and PIPE, COLD-DRAWN
Annealed	120-140	827-965	60-75	414-517	55-30	–	–
Solution-Treated	100-120	689-827	40-60	276-414	60-40	–	–

^aValues shown are composites for various product sizes up to 4 in. They are not suitable for specification purposes. For properties of larger-sized products, consult Special Metals Corporation.

Tensile Properties and Hardness

High-temperature tensile properties of annealed bar

Effect of Intermediate-Temperature Exposure (2000 hrs) on Properties of Hot-Rolled Annealed Bar

Exposure Temp., °F (°C)	Properties at Room Temp.					Properties at Exposure Temp.
	Tensile Strength		Yield Strength (0.2% offset)		Elongation, %	Tensile Strength		Yield Strength (0.2% offset)		Elongation, %
	ksi	MPa	ksi	MPa	Elongation, %	ksi	MPa	ksi	MPa	Elongation, %
No Exposure	140.0	965.3	69.5	479.2	54	–	–	–	–	–
1200 (649)	176.0	1213.5	126.5	872.2	30	146.5	1010.1	106.5	734.3	54
1400 (760)	163.0	1123.8	107.0	737.7	26	84.8	584.7	79.0	544.7	62
1600 (871)	144.0	992.8	76.7	528.8	34	41.2	284.1	40.0	275.8	80

^aValues shown are composites for various product sizes up to 4 in. They are not suitable for specification purposes. For properties of larger-sized products, consult Special Metals Corporation.

High-temperature tensile properties of cold-rolled annealed sheet

High-temperature tensile properties of hot-rolled solution-treated rod

Approximate relationships between hardness and tensile properties of strip

Fatigue Strength

Fatigue strength at room temperature of hot-rolled round (5/8-in. diameter)

Rotating-beam fatigue strength of hot-rolled solution-treated bar (0.625-in. diameter) at elevated temperature. Average grain size, 0.004 in.

Rotating-beam fatigue strength of hot-rolled annealed bar (0.625-in. diameter) at elevated temperature. Average grain size, 0.0006 in.; room-temperature hardness, 24.5 Rc

Creep and Rupture Strength

Creep strength of solution-treated material

Rupture life of solution-treated material

Creep strength of annealed material

Rupture life of annealed material

Corrosion Resistance

Scaling resistance at 1800°F

Working Instructions

Effect of Annealing (1 hour) on Room-Temperature Properties of Hot-Rolled Rod

Annealing Temperature, °F	Tensile Strength, ksi	Yield Strength (0.2% Offset), ksi	Elongation, %	Reduction Of Area, %	Hardness, Rb
As-Rolled	147.5	92.0	46.0	55.3	98
1400	145.5	90.8	43.0	49.5	101
1500	143.5	85.0	42.0	45.7	101
1600	145.5	87.2	39.0	41.5	101
1700	147.0	86.0	40.0	48.0	103
1800	143.5	83.6	44.0	48.0	101
1850	142.5	78.6	46.0	53.0	99
1900	142.5	66.3	49.0	51.5	95
2000	124.0	52.5	64.0	62.5	93
2100	116.0	50.0	62.0	61.0	89
2200	116.5	48.0	72.0	61.3	88
Annealing Temperature,°C	Tensile Strength, MPa	Yield Strength (0.2% Offset), MPa	Elongation, %	Reduction Of Area, %	Hardness, Rb
As-Rolled	1017.0	634.3	46.0	55.3	98
760	1003.2	626.0	43.0	49.5	101
816	989.4	586.1	42.0	45.7	101
871	1003.2	601.2	39.0	41.5	101
927	1013.5	593.0	40.0	48.0	103
982	989.4	576.4	44.0	48.0	101
1010	982.5	542.0	46.0	53.0	99
1038	982.5	457.1	49.0	51.5	95
1093	855.0	362.0	64.0	62.5	93
1149	799.8	344.7	62.0	61.0	89
1204	803.2	331.0	72.0	61.3	88

Effect of annealing temperature on the hardness Of sheet (30 min at temperature)

Effect of Annealing (1 Hour) on Room-Temperature Properties of Cold-Drawn Rod

Annealing Temperature,		Tensile Strength,		Yield Strength (0.2% Offset),		Elongation %	Reduction Of Area, %	Hardness, Rb	Impact Strength (Charpy V)		Grain Size,
°F	°C	ksi	MPa	ksi	MPa	Elongation %	Reduction Of Area, %	Hardness, Rb	ft•lb	J	in.	mm
As-Drawn	As-Drawn	163.0	1123.8	145.5	1003.2	21.0	50.5	106	64.5	87.5	0.003	.076
1100	593	160.5	1106.6	134.3	926.0	28.0	48.3	106	75.0	101.7	0.0035	.089
1200	649	159.5	1099.7	133.5	920.5	28.5	47.2	106	71.5	97.0	0.0045	.114
1300	704	164.0	1130.7	135.0	930.8	26.0	38.8	106	57.0	77.3	0.005	.127
1400	760	162.5	1120.4	135.5	934.2	27.0	39.0	106	53.0	71.9	0.005	.127
1500	816	152.0	1048.0	120.0	827.4	29.0	41.5	105	55.0	74.6	0.0035	.089
1600	871	146.5	1010.1	102.5	706.7	35.0	45.2	103	62.0	84.1	70% 0.005	.127
											30% 0.009	.229
1700	927	133.5	920.5	62.3	429.5	48.5	44.0	97	82.5	111.9	0.0008	.203
1800	982	127.5	879.1	62.3	429.5	52.0	55.3	95	84.5	114.6	0.0009	.229
1900	1038	130.5	899.8	60.8	419.2	53.0	55.7	95	91.0	123.4	0.0008	.203
2000	1093	126.5	872.2	56.5	389.6	57.0	61.0	93	115.5	156.6	0.0019	.048
2100	1149	118.0	813.6	48.3	333.0	63.0	60.4	89	138.0	187.1	0.0032	.081
2200	1204	113.0	779.1	44.6	307.5	62.3	58.4	86	141.0	191.2	0.006	.152

Loads required for shearing annealed material (hydraulic shear, 21/64 in./ft knife rake)

Room-Temperature Tensile Properties of As-Drawn Wire^a

Wire Diameter,		Cold Reduc-tion, %	Tensile Strength		Yield Strength (0.2% offset)^b,		Elongation In 10 Inches, %
In.	Mm	Cold Reduc-tion, %	ksi	MPa	ksi	MPa	Elongation In 10 Inches, %
0.0397^c	1.008^c	0	138	952	61.5	424	52.3
0.036	0.914	19	174.5	1203	153.3	1057	17.5
0.0318^d	0.808^d	37	220	1517	205	1413	2.0
0.0285^d	0.724^d	49	246	1696	218	1503	2.0
0.0253^d	0.643^d	60	269	1855	253	1744	2.4
0.0226^d	0.574^d	68	283	1951	242	1669	2.2
0.020^d	0.508^d	75	293	2020	251	1731	2.0
0.0179	0.455	80	295.3	2036	220	1517	3.8
0.0159	0.404	84	303	2089	250	1727	3.4
0.0142	0.361	87	306	2110	252.8	1743	3.0
0.0126	0.320	90	316	2181	269	1855	2.6
0.0111	0.282	92	316	2179	264	1820	2.3
0.0099	0.251	94	322.3	2222	274.5	1893	3.0

^aAverage of 2 tests unless otherwise shown. ^bCrosshead speed, 0.1 in./min. ^cStrand-annealed at 2150°F, 29 ft/min, in 10-ft furnace with 6-7 ft hot zone. ^dOne test.

Effect of Cold Work on Mechanical Properties of Strips Cut From Hot-Rolled Plate (0.372-in.), Solution-Treated 2150°F/1 hr and Cold Worked

Cold Reduction, %	Tensile Strength		Yield Strength (0.2% offset)^b		Elongation %	Reduction Of Area, %	Hardness
Cold Reduction, %	ksi	MPa	ksi	MPa	Elongation %	Reduction Of Area, %	Rockwell C	Vickers
0	115.5	796.3	49.5	341.3	67.0	60.4	88 Rb	179
5	121.0	834.3	77.5	534.3	58.0	58.1	94 Rb	209
10	130.0	896.3	102.5	706.7	47.5	54.6	25	257
15	137.0	944.6	112.5	775.7	39.0	51.9	32	309
20	143.0	986.0	125.0	861.8	31.5	50.0	34	326
30	165.0	1137.6	152.0	1048.0	17.0	49.3	36	344
40	179.5	1237.6	167.0	1151.4	12.5	41.9	39	372
50	189.5	1306.6	177.0	1220.4	8.5	38.0	40	382
60	205.0	1413.4	180.5	1244.5	6.5	32.7	44	427
70	219.0	1510.0	201.0	1385.8	5.0	25.4	45	440

Effect of cold work on hardness

Machining

Recommended Conditions for Turning with Single-Point Tools

High Speed Steel				Coated Carbide
Surface Speed		Feed		Surface Speed		Feed
fpm	m/min	lpr	Mm/rev	fpm	m/min	lpr	m/rev
13-35	4.0-10.7	0.005-0.020	0.13-0.51	45-110	14-34	0.005-0.020	0.13-0.51

Welding

Limiting Chemical Composition, %, of Welding Products

	INCONEL Filler Metal 625	INCONEL^a Welding Electrode 112
Nickel^b	58.0 min.	55.0 min.
Carbon	0.10 max.	0.10 max.
Manganese	0.50 max.	1.0 max.
Iron	5.0 max.	7.0 max.
Sulfur	0.015 max.	0.02 max.
Silicon	0.50 max.	0.75 max.
Chromium	20.0-23.0	20.0-23.0
Niobium (plus Tantalum)	3.15-4.15	3.15-4.15
Molybdenum	8.0-10.0	8.0-10.0
Aluminum	0.40 max.	–
Titanium	0.40 max.	–
Cobalt^c	–	0.12^c
Phosphorus	0.02 max.	0.03
Copper	0.50 max.	0.50 max.
Other	0.50 max.	0.50 max.

^aDeposited weld metal. ^bPlus cobalt. ^cWhen specified.

All-Weld-Metal Properties

Low-Temperature Impact Strength of INCONEL Welding Products All-Weld Metal

Welding Material	Notch Orientation To Welding Direction	Charpy V-Notch Impact Strength, ft-lb (J)
Welding Material	Notch Orientation To Welding Direction	-320°F (-196°C)	-110°F (-79°C)	Room Temperature
Filler Metal 625^a	Perpendicular	57.0 (77.3)	60.0 (81.5)	68.5 (92.9)
Electrode 112	Perpendicular	34.8 (47.2)	42.5 (57.6)	46.5 (63.1)
Electrode 112	Parallel	32.8 (44.5)	41.5 (56.3)	45.0 (61.0)

^aGas-tungsten-arc welding process.

High-temperature tensile properties of transverse specimens of INCONEL alloy 625 welds (1/2-in. solution-treated plate; gas-tungsten-arc process with INCONEL Filler Metal 625)

High-temperature tensile properties of INCONEL alloy 625 all-weld metal (1/2-in. solution-treated plate; gastungsten-arc process with INCONEL Filler Metal 625)

High-temperature tensile properties of deposited weld metal from weld made in alloy 625 with Welding Electrode 112

Rupture strength of INCONEL Welding Electrode 112 all-weld metal

100-hr rupture strength of transverse specimens from joints n alloy 625 made by gas-tungsten-arc process using Filler Metal 625

Transverse Properties

Strength of Dissimilar Welds^a

INCONEL alloy 625 Joined to	Gas-Metal-Arc (Spray Transfer) With Filler Metal 265		Gas-Tungsten-Arc With Filler Metal 625		Shielded-Metal-Arc With Welding Electrode 112
INCONEL alloy 625 Joined to	Tensile Strength, Ksi (MPa)	Fracture Location	Tensile Strength, Ksi (MPa)	Fracture Location	Tensile Strength, Ksi (MPa)	Fracture Location
Hastelloy alloy X	121.2 (835.6)	Alloy X	119.7 (825.3)	Alloy X	118.5 (817.0)	Alloy X
INCONEL alloy 718	120.7 (832.2)	Alloy 718	107.5 (741.2)	Alloy 718	110.25 (760.1)	Alloy 718
Type 304 Stainless Steel	88.5 (610.2)	Type 304	92.0 (634.3)	Type 304	91.25 (629.1)	Type 304
Type 410 Stainless Steel	65.6 (452.3)	Type 410	67.6 (466.1)	Type 410	61.6 (424.7)	Type 410
MO-RE® 1	–	–	97.3 (670.9)	MO-RE 1	94.7 (653.0)	MO-RE 1

^aTransverse specimens. Joints were 3/8 in. thick except for those with MO-RE 1, which were ½ in. ^bThese joints were preheated to 300°F. Hastelloy is a trademark of Haynes International, and MO-RE is a trademark of Blaw-Knox Corporation

Inconel 625

Inconel 625

Key

UNS N06625

Summary

Specifications & Technical Data

Mechanical Properties

True stress-true strain of round.

Nominal Room-Temperature Mechanical Propertiesa

Tensile Properties and Hardness

High-temperature tensile properties of annealed bar

Effect of Intermediate-Temperature Exposure (2000 hrs) on Properties of Hot-Rolled Annealed Bar

High-temperature tensile properties of cold-rolled annealed sheet

High-temperature tensile properties of hot-rolled solution-treated rod

Approximate relationships between hardness and tensile properties of strip

Fatigue Strength

Fatigue strength at room temperature of hot-rolled round (5/8-in. diameter)

Rotating-beam fatigue strength of hot-rolled solution-treated bar (0.625-in. diameter) at elevated temperature. Average grain size, 0.004 in.

Rotating-beam fatigue strength of hot-rolled annealed bar (0.625-in. diameter) at elevated temperature. Average grain size, 0.0006 in.; room-temperature hardness, 24.5 Rc

Creep and Rupture Strength

Creep strength of solution-treated material

Rupture life of solution-treated material

Creep strength of annealed material

Rupture life of annealed material

Corrosion Resistance

Scaling resistance at 1800°F

Working Instructions

Effect of Annealing (1 hour) on Room-Temperature Properties of Hot-Rolled Rod

Effect of annealing temperature on the hardness Of sheet (30 min at temperature)

Effect of Annealing (1 Hour) on Room-Temperature Properties of Cold-Drawn Rod

Loads required for shearing annealed material (hydraulic shear, 21/64 in./ft knife rake)

Room-Temperature Tensile Properties of As-Drawn Wirea

Effect of Cold Work on Mechanical Properties of Strips Cut From Hot-Rolled Plate (0.372-in.), Solution-Treated 2150°F/1 hr and Cold Worked

Effect of cold work on hardness

Machining

Recommended Conditions for Turning with Single-Point Tools

Welding

Limiting Chemical Composition, %, of Welding Products

All-Weld-Metal Properties

Low-Temperature Impact Strength of INCONEL Welding Products All-Weld Metal

High-temperature tensile properties of transverse specimens of INCONEL alloy 625 welds (1/2-in. solution-treated plate; gas-tungsten-arc process with INCONEL Filler Metal 625)

High-temperature tensile properties of INCONEL alloy 625 all-weld metal (1/2-in. solution-treated plate; gastungsten-arc process with INCONEL Filler Metal 625)

High-temperature tensile properties of deposited weld metal from weld made in alloy 625 with Welding Electrode 112

Rupture strength of INCONEL Welding Electrode 112 all-weld metal

100-hr rupture strength of transverse specimens from joints n alloy 625 made by gas-tungsten-arc process using Filler Metal 625

Transverse Properties

Strength of Dissimilar Weldsa

Bolts & Screws

Set Screws

Socket Products

Vented Products

Nuts

Washers

Studs & Rods

U-bolts

Pins & Keys

Fittings

Overview of Inconel® 625

What is Inconel® 625

Inconel® 625 Chemical Composition

A Chemical Composition Comparison

Yield Strength vs. Temperature Comparison

Crevice & Pitting Corrosion Resistance

Oxidation Resistance

Stress Corrosion Resistance

Sample Products

Socket Head Cap Screw Inconel® 625 material

12-Point Flange Screw 5/16″ Diameter Inconel® 625 Material

Lock Nut Inconel 625® Material

Vented Screw Square Head Socket Head Cap Screw Inconel® 625 Material

Socket Set Screws 1/2″ Diameter Inconel® 625

Industries We Serve

Air Pollution Control

Chemical Processing

Electronics & Semi-conductors

Power Generation

Water Systems

Pulp & Paper Mills

Oil & Gas

Nominal Room-Temperature Mechanical Properties^a

Room-Temperature Tensile Properties of As-Drawn Wire^a

Strength of Dissimilar Welds^a