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Major Super Alloy Materials

Hastelloy	Inconel	Incoloy	Monel	Stellite
Hastelloy C22 Hastelloy C276	Inconel 600 Inconel 625 Inconel 718	Alloy 20 Incoloy 800/800H Incoloy 825	Monel 400	Stellite 6B

Material Specification

Hastelloy C22 and C276

These alloys exhibit excellent resistance to both oxidizing and reducing acid environments, as well as those containing mixed acids. It is particularly useful for resistance to pitting and crevice corrosion in acid-halide environments. The low carbon content minimizes carbide precipitation during welding to maintain corrosion resistance in as-welded structures.

Chemical Composition

Grade Symbal	UNS Designation	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Nickel	Molybdenum	Others
Hastelloy C22	UNS N06022	0.015	0.50	0.02	0.02	0.08	20.0-22.5	Balance	12.5-14.5	Thungsten 2.5-3.0; Cobalt 2.5; Vanadium 0.35;
Hastelloy C276	UNS N10276	0.010	1.00	0.04	0.04	0.08	14.5-16.5	Balance	15.0-17.0	Iron 4.0-7.0; Tungsten 3.0-4.5; Cobalt 2.5; Vandium 0.35;

Mechanical Properities and ASTM Specifications

Grade Symbal

UNS Designation

Condition

Tensile Strength

min ksi

Tensile Strength

min MPa

Yield Stegnth

min ksi

Yield Strength

min MPa

Elongation in 2in or 4D min%

Pipe

Smls

Pipe

Sheet

Plate

Bar

Forging

Fitting

Hastelloy C22

UNS N06022

Solution Annealed

100

690

310

B622

B619

B575

B574

B564

B366

Hastelloy C276

UNS N10276

Solution Annealed

100

690

283

B622

B575

B574

B564

B366

Inconel 600, 625 and 718

These high strength alloys are designed to resist a wide range of severely corrosive environments, pitting and crevice corrosion.

Chemical Composition

Grade Symbal	UNS Designation	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Nickel	Molybdenum	Others
Inconel 600	UNS N06600	0.15	1.00	...	0.015	0.50	14.0-17.0	72.0 min	...	Cu 0.5; Iron 6.0-10.0
Inconel 625	UNS N06625	0.10	0.035	0.015	0.015	0.50	20.0-23.0	58.0 min	8.0-10.0	Fe 5.0; Cobalt 1.0 max; Columbium+Tantalum 3.15-4.15; Al 0.40 max; Ti 0.40 max;
Inconel 718	UNS N07718	0.08	0.035	0.015	0.015	0.035	17.0-21.0	50.0-55.0	2.8-3.3	Cu 0.3; Boron 0.006 max; Columbium+Tantalum 4.75-5.50; Ti 0.65-1.15; Cobalt 1.0 max

Mechanical Properities and ASTM Specifications

Grade Symbal

UNS Designation

Condition

Tensile Strength

min ksi

Tensile Strength

min MPa

Yield Stegnth

min ksi

Yield Strength

min MPa

Elongation in 2in or 4D min%

Reduction of Area, C, D min%

Brinell Hardness, HBW

Pipe

Bar

Forging

Fitting

Inconel 600

UNS N06600

Annealed

552

241

B167

B166

B564

B366

Inconel 625

UNS N06625

Annealed

120

B444

B446

Inconel 718

UNS N07718

Solution + Precipitation harden

185

1275

150

1034

331 min

B637

Incoloy 800/800H, 825 and Alloy 20

These nickel steel alloys are designed to provide exceptional resistance to many corrosive environments. They have excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localized attack such as pitting and crevice corrosion.

Chemical Composition

Grade Symbal	UNS Designation	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Nickel	Molybdenum	Others
Incoloy 800	UNS N08800	0.10	1.50	0.045	0.015	1.00	19.0-23.0	30.0-35.0	...	Fe 39.5 min; Cu 0.75; Al 0.15-0.60; Ti 0.15-0.60;
Incoloy 800H	UNS N08810	0.10	1.50	0.045	0.015	1.00	19.0-23.0	30.0-35.0	...	Fe 39.5 min; Cu 0.75; Al 0.15-0.60; Ti 0.15-0.60;
Incoloy 825	UNS NO8825	0.05	1.00	0.03	...	0.5	19.5-23.5	38.0-46.0	2.5-3.5	Fe 22.0 min; Cu 1.5-3.0; Ti 0.6-1.2; Al 0.2;
Alloy 20	UNS N08020	0.07	2.00	0.045	0.03	1.00	19.0-21.0	32.0-38.0	2.0-3.0	Cu 3.0-4.0; Nb 8 x C min 1.00 max;

Mechanical Properities and ASTM Specifications

Grade Symbal

UNS Designation

Condition

Tensile Strength

min ksi

Tensile Strength

min MPa

Yield Stegnth

min ksi

Yield Strength

min MPa

Elongation in 2in or 4D min%

Reduction of Area, C, D min%

Brinell Hardness, HBW

Pipe

Bar

Forging

Fitting

Incoloy 800

UNS N08800

Annealed

515

205

192

B407

B408

B564

B366

Incoloy 800H

UNS N08810

Annealed

440

170

192

B407

B408

B564

B366

Incoloy 825

UNS N08825

Annealed

586

240

B423

B425

B564

B366

Alloy 20

UNS N08020

Solution Annealed

550

240

B729

B473

B462

B366

Monel 400

This nickel alloy exhibits characteristics like good corrosion resistance, good weldability and high strength. A low corrosion rate in rapidly flowing brackish or seawater combined with excellent resistance to stress-corrosion cracking in most freshwaters, and its resistance to a variety of corrosive conditions led to its wide use in marine applications and other non-oxidizing chloride solutions.

Chemical Composition

Grade Symbal	UNS Designation	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Nickel	Molybdenum	Others
Monel 400	UNS N04400	0.30	2.0	...	0.024	0.5	...	63.0 min	...	Cu 28.0-34.0; Fe 2.5 max;

Mechanical Properities and ASTM Specifications

Grade Symbal

UNS Designation

Condition

Tensile Strength

min ksi

Tensile Strength

min MPa

Yield Stegnth

min ksi

Yield Strength

min MPa

Elongation in 2in or 4D min%

Reduction of Area, C, D min%

Pipe

Bar

Forging

Fitting

Monel 400

UNS N04400

Annealed

483

172

B165

B164

B564

B366

Stellite 6B

This Cobalt Alloy is used in applications where wear, corrosion and high temperature resistance are needed. It is most commonly found in directional drilling tools, aerospace applications, valve parts, shaft sleeves and tools.

Chemical Composition

Grade Symbal	UNS Designation	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Nickel	Molybdenum	Others
Stellite 6B	UNS R30016	0.9-1.4	2.0	0.04	0.03	2	28-32	3.0	1.5	Tungsten 3.5-5.5; Fe 3.0 max; Cobalt balance;

Mechanical Properities and AMS Specifications

Grade Symbal	UNS Designation	Condition	Tensile Strength min ksi	Tensile Strength min MPa	Yield Stegnth min ksi	Yield Strength min MPa	Elongation in 2in or 4D min%	Reduction of Area, C, D min%	Bar	Plate
Stellite 6B	UNS R30016	Solution	130	483		172	5	7	AMS 5894	AMS 5894

* Inconel, Incoloy and Monel are registered trademarks of Special Metals Corporation; Stellite is registered as trademark of Kennametal Inc; Hastelloy is registered trademark of Haynes International Inc. We provide equivalent products.

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