Hastelloy/

Hastelloy

Hastelloy Steel grades at a glance with ASTM specification and equivalent chart

Hastelloy alloy, a nickel-based alloy, is categorised primarily into two groups: one with a higher molybdenum content and the other with more chromium. Both fall under the umbrella term “Hastelloy.” These alloys exhibit exceptional resistance to potent oxidising solutions and possess high durability in reducing agents. Their resistance to intergranular corrosion is attributed to low carbon content and minimal carbide precipitation during welding. Hastelloy finds versatile applications in sour gas wells, waste treatment plants, chemical processing components, pulp and paper industries, chemical plants’ reaction vessels, heat exchangers, fans, and food processing equipment. The unique properties of Hastelloy include resistance to oxidation and reduction, performance in cryogenic and high temperatures, resistance to wet chlorine gas, and resilience against chloride and chlorine derivatives.

The pricing for Hastelloy varies per kilogram based on the specific product, and a comprehensive price list can be obtained from us. Hastelloy offers numerous advantages over ordinary metals and other alloys, boasting high resistance to localised and uniform corrosion, as well as good resistance against most salts and brackish waters. The term “Hastelloy” is commonly used as an abbreviation in the metal industry, replacing the full form “nickel chromium molybdenum alloys.” The Hastelloy alloy composition encompasses molybdenum, chromium, iron, tungsten, cobalt, manganese, copper, vanadium, phosphorus, silicon, and sulphur. The composition varies depending on the grade and standards of the alloy, with each class and grade exhibiting specific characteristics and applications. Hastelloy suppliers offer a range of products, from fasteners and pipes to bolts and contour rings. In addition to Hastelloy, other alloys within the superalloy family, including Inconel and Monel, are also available.

Hastelloy Alloy Grades

Hastelloy C276

Hastelloy C22

Hastelloy B2

Hastelloy B3

Hastelloy X

Hastelloy Alloy ASTM Standard

AlloyUNSBarsPipes

C-4

N06455

ASTM B574/ B575/ B619

B622 / B619 / SB 619 / B626 / SB 626

C-22

N06022

ASTM B564/ B472/ B574

B622 / B619 / SB 619/ B626 / SB 626

C-2000

N06200

ASTM B564/ B472/ B574

B622 / B619 / SB 619/ B626 / SB 626

G-30

N06030

ASTM B472/ B581

B622 / B619 / SB 619/ B626 / SB 626

G-35

N06035

ASTM B564/ B472/ B574

B622 / B619/ SB 619 / B626 / SB 626

C-276

N10276

ASTM B564/ B472/ B574

B622 / B619 / SB 619/ B626 / SB 626
Hastelloy XN06002ASTM B564/ B472/ B574B622 / B619 / SB 619 B626 / SB 626
HAYNES ® HR-120, NAS H38XN08120B407 / B514 / B515

Hastelloy Alloy Equivalent

CES NameUSAWerkstoff Nr.
Alloy NameUNSWNR
B-2N10665DIN 2.4617
CN10002
C-4N06455DIN 2.4610
C-276N10276DIN 2.4819
GN06007
G-3N06985DIN 2.4619
NN10003
SN06635
WN10004
XN06002DIN 2.4665

Specification of Hastelloy Alloy

Corrosion Resistant Grades
  • Hastelloy C22
  • Hastelloy B2
  • Alloy C4
Heat Resisting Grades
  • Alloy S
  • Alloy W
  • Alloy X

Hastelloy Alloy Temperature Range

HASTELLOY® B-3® alloy400 – 450 Deg C (750 – 840 Degree F)
C-22400 – 450Deg C (750 – 840 Degree F)
C-276870 – 1230Deg C (1600 – 2250 Degree F)
® N alloy704 to 871Deg C (1300 to 1600 Degree F)
HAYNES® 25 alloy980Deg C (1800 Degree F)
HAYNES® 188 alloy1095Deg C (2000 Degree F)

Hastelloy Alloy Applications & Uses

  • Chemical processing plants
  • Expansion bellow
  • Nuclear plants & processing
  • Industrial equipment

Hastelloy Alloy Chemical Composition

Alloy TypeCr%C%Co%W%Mo%V%Ai%Ti%Nb %Fe%Cu%Ni%Other %
Alloy B0.60.11.25280.35.5rest / balMn 0.80; Si 0.70
Alloy B210.02126.0-30.02rest / balMn 1.0, Si 0.10
Alloy C27614.0-16.50.022.53.0-4.515.0-17.00.354.0-7.0rest / balMn 1.0; Si 0.05
Alloy X220.11.50.6918.5rest / balMn 0.6; Si 0.60
Alloy C160.071.2540170.35.75rest / balMn 1.0; Si 0.70
Alloy C414.0-18.00.015214.0-17.00..703rest / balMn 1.0 ; Si 0.08
Alloy N70.060.250.216.530.1rest / balMn 0.40; Si 0.25; B 0.01
Alloy S15.50.022114.50.60.23rest / balMn 0.50; Si 0.40; B0.0009; La 0.02
Alloy F220.021.250.56.52.121rest / balMn 1.50; Si 0.50
Alloy G21.0-23.50.052.515.5-7.51.7-2.518.0-21.01.5-2.5rest / balMn 1.0-2.0; P0.04; Si 1.0; 
Alloy G223.0-26.00.035.0-7.00.70-1.50rest / bal0.70-1.2047.0-52.0Mn 1.0; Si 1.0
Alloy W50.061.2524.55.5rest / balMn 0.050; Si 0.50

Hastelloy Alloy Properties

Corrosion Resistance comparison between most common steel grades

Alloy name

Critical Pitting Temp in Acidified 6% FeCl3

Acidified 6% FeCl3 Critical Crevice Temperature

°F

°C

°F

°C

316L

59

15

32

0

254SMO

140

60

86

30

625

212

100

104

40

C-276

>302

>150

131

55

C-22®

>302

>150

176

80

Corrosion Cracking comparison

Grade

Cracking Timing

316L

2 h

254SMO

24 h

625

No Cracking in 1,008 h

C-276

No Cracking in 1,008 h

C-22®

No Cracking in 1,008 h

Seawater Resistance comparison

Grade

Quiescent

Flowing

No. of Attacked Sites

Max. Depth

No. of Attacked Sites

Max. Depth

316L

A:2, B:2

A:1.33, B:2.27

A:2, B:2

A:0.48, B:0.15

254SMO

A:2, B:2

A:0.76, B:1.73

A:2, B:2

A:0.01, B:<0.01

625

A:1, B:2

A:0.18, B:0.04

A:2, B:2

A:<0.01, B:<0.01

C-276

A:1, B:1

A:0.10, B:0.13

A:0, B:0

A:0, B:0

C-22®

A:0, B:0

A:0, B:0

A:0, B:0

A:0, B:0

Hardness

HRB = Hardness Rockwell “B”.

Hastelloy Grade

Sheets HRB

Plates HRB

C22

93

95

C276

90

87

N

96

X

54

54

PHONE NUMBER

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Office Address

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