Hastelloy B and B-2 TECHNICAL DATA

Type Analysis | Corrosion Resistance | Heat Treatment | Properties Data

Type Analysis

Element

Hastelloy B

Hastelloy B-2

Carbon, max

0.05

0.02

Nickel

REM

Molybdenum

26.0-30.0

Iron

4.0-6.0

2.0 max

Chromium, max

1.00

Silicon,max

1.00

0.10

Cobalt, max

2.50

1.00

Manganese, max

1.00

Phosphorus, max

0.04

Sulfur, max

0.03

Vanadium

0.2-0.4

---

Corrosion Resistance in the As-Welded Condition

Hastelloy B-2 is an improved wrought version of Hastelloy B. Alloy B-2 has the same excellent corrosion resistance as alloy B, but with improved resistance to knife-line and heat-affected zone attack. This alloy resists the formation of grain-boundary carbide precipitates in the weld heat-afftected zone, thus making it suitable for most chemical process applications in the as-welded condition. Alloy B-2 also has excellent resistance to pitting and stress-corrosion cracking.

Hastelloy B-2 is particularly well suited for equipment handling hydrochloric acid at all concentrations and temperatures including the boiling point. It is also resistant to hydrogen chloride gas, and sulfuric, acetic, and phosphoric acids.

Alloy B-2 is not recommended in the presence of ferric or cupric salts as these salts may cause rapid corrosion failure. Ferric or cupric salts may develop when hydrochloric acid comes in contact with iron and copper. Therefore, when Hasteloy B-2 is used in conjunction with iron or copper piping in a system containing hydrochloric acid, the presence of these salts could cause alloy B-2 to fail prematurely.

Exposure of alloy B-2 to temperatures from 1000 °F to 1500 °F should be avoided because of a reduction in the ductility of the alloy. In oxidizing gases such as air, alloy B-2 may be used at temperatures up to 1000 °F. In reducing gases or in vacuum, the alloy may be used from 1500 °F to substantially higher temperatures.

Limited tests indicate that the corrosion resistance of alloy B-2 in boiling 20 percent hydrochloric acid is not affected by cold reduction of up to 50% as compared to tests on the solution heat-treated alloy.

Heat-Treatment

Wrought form of alloy B-2 are furnished in the solution heat-treated condition unless otherwise specified. Alloy B-2 is solution heat-treated at 1950 °F (1066 °C) and rapid quenched.

Properties Data

Average Physical Properties

Physical Properties

°F

British Units

°C

Metric Units

Density

72

0.333 lb./in.(3)

22

9217 kg/m(3)

Electrical
Resistivity

32

54.1 microhm-in.

0

1.37 microhm-m

212

54.3 microhm-in.

100

1.38 microhm-m

392

54.5 microhm-in.

200

1.38 microhm-m

572

54.6 microhm-in.

300

1.39 microhm-m

752

54.8 microhm-in.

400

1.39 microhm-m

932

55.6 microhm-in.

500

1.41 microhm-m

1112

57.6 microhm-in.

600

1.46 microhm-m

Mean Coefficient
of Thermal
Expansion

68-200

5.7 microin./in.-°F

20-93

10.3 X 10(-6)m/m-K

68-400

6.0 microin./in.-°F

20-204

10.8 X 10(-6)m/m-K

68-600

6.2 microin./in.-°F

20-316

11.2 X 10(-6)m/m-K

68-800

6.4 microin./in.-°F

20-427

11.5 X 10(-6)m/m-K

68-1000

6.5 microin./in.-°F

20-538

11.7 X 10(-6)m/m-K

Thermal
Conductivity

32

77 Btu-in/ft²-hr-°F

0

11.1 W/m-K

212

85 Btu-in/ft²-hr-°F

100

12.2 W/m-K

392

93 Btu-in/ft²-hr-°F

200

13.4 W/m-K

572

102 Btu-in/ft²-hr-°F

300

14.6 W/m-K

752

111 Btu-in/ft²-hr-°F

400

16.0 W/m-K

932

120 Btu-in/ft²-hr-°F

500

17.3 W/m-K

1112

130 Btu-in/ft²-hr-°F

600

18.7 W/m-K

Thermal
Diffusivity

32

0.005 in²/sec

0

3.2 x 10(-6)m²/s

212

0.005 in²/sec

100

3.4 x 10(-6)m²/s

392

0.006 in²/sec

200

3.6 x 10(-6)m²/s

572

0.006 in²/sec

300

3.8 x 10(-6)m²/s

752

0.006 in²/sec

400

4.0 x 10(-6)m²/s

932

0.007 in²/sec

500

4.2 x 10(-6)m²/s

1112

0.007 in²/sec

600

4.5 x 10(-6)m²/s

Specific Heat

32

0.089 Btu/lb-°F

0

373 J/kg-K

212

0.093 Btu/lb-°F

100

389 J/kg-K

392

0.097 Btu/lb-°F

200

406 J/kg-K

572

0.101 Btu/lb-°F

300

423 J/kg-K

752

0.103 Btu/lb-°F

400

431 J/kg-K

932

0.106 Btu/lb-°F

500

444 J/kg-K

1112

0.109 Btu/lb-°F

600

456 J/kg-K

Average Formability, 0.063 in SHEET

Condition

Average Olson cup depth, in

Average Olson cup depth, mm

Heat-treated at:
1950 °F (1066 °C)
rapid quenched

0.57

14.5

Average Dynanic Modulus of Elasticity

Form

Condition

Test
Temp.,
°F (°C)

Dynamic Modulus of Elasticity,
psi x 10(6) (MPa)


Plate
1/2-in (12.7 mm)
thick

Heat-treated at
1950 °F (1066 ° C)

Room
600 (316)
800 (427)
1000 (538)

31.4 (217,000)
29.3 (202,000)
28.4 (196,000)
27.4 (189,000)

Average Tensile Data

Form

Condition

Test
Temp.,
°F (°C)

Ultimate
Tensile
Strength,
ksi (MPa)

Yield
Strength
at 0.2%
offset,
ksi (MPa)

Elongation
in 2",
percent

Hardness
Rockwell

Sheet,
0.050 to 0.120"
(1.3 to 3.1 mm),
thick

Heat treated at
1950 °F
(1066 °C)
rapid quench

Room*
400 (204)*
600 (316)*
800 (427)*

138.5 (955)
128.4 (885)
125.3 (864)
125.6 (866)

76.3 (526)
65.4 (451)
61.8 (426)
60.6 (418)

53
50
49
51

C-22
--
--
--

Sheet and Plate
0.100 to 0.350"
(2.5 to 8.9 mm)
thick

Heat treated at
1950 °F
(1066 °C)
rapid quenched

Room**
400 (204)**
600 (316)**
800 (427)**

129.7 (894)
123.2 (849)
119.3 (823)
116.9 (806)

59.8 (412)
50.8 (350)
47.5 (328)
44.9 (310)

61
59
60
60

B-95
--
--
--

Plate,
0.360 to 2"
(9.1 to 51 mm),
thick

Heat treated at
1950 °F
(1066 °C)
rapid quenched

Room(1)
400 (204)(2)
600 (316)(2)
800 (427)(2)

130.9 (902)
126.2 (871)
121.8 (840)
119.3 (823)

59.0 (407)
52.3 (361)
48.8 (336)
46.3 (319)

61
60
60
61

B-94
--
--
--

 
*Average of 8-9 tests.
**Average of 73 tests.

Average Aged Ductility, Sheet*

Aging Temp.,
°F (°C)

Aging Time, min

Elongation in
2" (50.8 mm),
percent

1300 (704)

1
5
10
30

48
39
27
13

1350 (732)

1
5
10
30

48
14
17
7

1400 (760)

1
5
10
30

44
14
3
2

1450 (788)

1
5
10
30

45
11
4
3

 
*0.180" (4.6 mm) thickness

Hastelloy B/B-2 - Current Inventory Stock

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