Hastelloy B2

Hastelloy B2

Nickel (Ni) - 66.82 Balance
Chromium (Cr) - 1.0 Max
Molybdenum (Mo) - 28.0 Median
(26.0 Min - 30.0 Max)
Iron (Fe) - 2.0 Max
Manganese (Mn) - 1.0 Max
Cobalt (Co) - 1.0 Max
Other

Key

Nickel
Copper
Chromium
Aluminum
Molybdenum
Iron
Titanium
Manganese
Cobalt
Other
  • Nickel (Ni) 66.82 Balance
  • Chromium (Cr) 1.0 Max
  • Molybdenum (Mo) 28.0 Median
    (26.0 Min - 30.0 Max)
  • Iron (Fe) 2.0 Max
  • Manganese (Mn) 1.0 Max
  • Cobalt (Co) 1.0 Max
  • Carbon (C) 0.01 Median
    (0.05 Min - 0.15 Max)
  • Silicon (Si) 0.10 Max
  • Phosphorus (P) 0.04 Max
  • Sulfur (S) 0.03 Max

UNS N10665

Hastelloy B2 is a nickel-molybdenum alloy known for its exceptional resistance to hydrochloric acid at all concentrations and temperatures. It also offers resistance to sulfuric, acetic, and phosphoric acids, making it highly suitable for applications in chemical processing industries, particularly in environments where corrosion is a concern.

Its composition includes nickel, molybdenum, iron, and chromium, with trace amounts of other elements. Hastelloy B2 is often utilized in chemical reactors, heat exchangers, valves, and piping systems where resistance to corrosion and stress cracking is essential. Its versatility and durability make it a preferred choice in harsh chemical environments, providing long-term reliability and safety.

Summary

  • Environment:
    Severe Environments: Hot Concentrated Acids & Chemicals
  • Temperature Limit:
    1000 °F / 538 °C
  • Ultimate Tensile (Typical):
    110 ksi / 758 mpa

Specifications & Technical Data

If your question isn’t answered below, download the complete technical data sheet here.

Specifications

  • Plate, Sheet & Strip: ASTM B333, ASME SB333
  • Rod & Bar: ASTM B335, ASME SB335

Physical Properties

Physical Properties Temp., °F Imperial Units Temp., °C Metric Units
Density 72 0.333 lb./in.3 22 9.22 g/cm3
 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 microinches/in.-°F 20-93 10.3 x 10-6m/m•K
68-400 6.0 microinches/in.-°F 20-204 10.8 x 10-6m/m•K
68-600 6.2 microinches/in.-°F 20-316 11.2 x 10-6m/m.K
68-800 6.4 microinches/in.-°F 20-427 11.5 x 10-6m/m.K
68-1000 6.5 microinches/in.-°F 20-538 11.7 x 10-6m/m.K
Thermal Conductivity 32 77 Btu-in./ft.2-hr.-°F 0 11.1 W/m•K
212 85 Btu-in./ft.2-hr.-°F 100 12.2 W/m•K
392 93 Btu-in./ft.2-hr.-°F 200 13.4 W/m•K
572 102 Btu-in./ft.2-hr.-°F 300 14.6 W/m•K
752 111 Btu-in./ft.2-hr.-°F 400 16.0 W/m•K
932 120 Btu-in./ft.2-hr.-°F 500 17.3 W/m•K
1112 130 Btu-in./ft.2-hr.-°F 600 18.7 W/m•K
Thermal Diffusivity 32 0.005 in.2/sec. 0 3.2 × 10-6m¾/s
212 0.005 in.2/sec. 100 3.4 × 10-6m¾/s
392 0.006 in.2/sec. 200 3.6 × 10-6m¾/s
572 0.006 in.2/sec. 300 3.8 × 10-6m¾/s
752 0.006 in.2/sec. 400 4.0 × 10-6m¾/s
932 0.007 in.2/sec. 500 4.2 × 10-6m¾/s
1112 0.007 in.2/sec. 600 4.5 × 10-6m¾/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

Mechanical Properties

Tensile Data
Form Condition Test Temp.
°F (°C)
Ultimate
Tensile
Strength, Ksi (MPa)
Yield
Strength at 0.2% offset, Ksi (MPa)
Yield
Strength at 0.2% offset, Ksi (MPa)
Hardness, Rockwell
Sheet, (bright annealed) Heat-treated at
2100°F (1149°C, hydrogen cooled
Room 132.5 (914) 57.5 (396) 55 B-98
Sheet and Plate,0.100 to 0.350 in. (2.5 to 8.9 mm) thick Heat-treated at 1950°F (1066°C), rapid quenched Room* 129.7 (894) 59.8 (412) 61 B-95
400 (204)* 400 (204)* 50.8 (350) 59
600 (316)* 119.3 (823) 47.5 (328) 60
800 (427)* 116.9 (806) 44.9 (310) 60
Plate, 0.360 to 2 in. (9.1 to
51 mm) thick
Heat-treated at
1950°F (1066°C), rapid quenched
Room 130.9 (902) 59.0 (407) 61 B-94
400 (204)2 126.2 (871) 52.3 (361) 60
600 (316)2 121.8 (840) 48.8 (336) 60
800 (427)2 119.3 (823) 46.3 (319) 61
Plate, 1/4 in.
(6.4 mm) thick
As manual gas tungsten arc welded Room 124.0 (855)
Manual gas tungsten arc welded3 Room 118.5 (817)
*Average of 73 tests. 1Average of 33-34 tests. 2Average of 18 tests. 3Heat-treated at 1950°F (1066°C), rapid quenched.

 

Average Modulus of Elasticity
Form Condition Test Temp °F (°C) Dynamic Modulus of Elasticity 106 psi (GPa)
Plate 1/2 in. (12.7 mm) thick Heat-treaded at: 1950°F ( 1066°C), rapid quenched Room 31.4(217)
600 (316) 29.3 (202)
800 (427) 28.4 (196)
1000 (538) 27.4(189)

 

Age Ductility, Sheet*
Aging Temp., oF (°C) Aging Time, min. Elongation in 2 in. (50.8 mm), percent
1300 (704) 1 48
5 39
1 27
30 13
1350 (732) 1 48
5 14
10 17
30 7
1400 (760) 1 44
5 14
10 3
30 2
1450(788) 1 45
5 11
10 4
30 3

*0.180 in. (4.6 mm) in thickness.

Corrosion Resistance

Corrosion Data in Boiling Acids*
Media Concentration, percent by weight Average Corrosion Rate per year
mils mm
Acetic Acid 10 0.5 < 0.02
30 0.4 0.01
50 0.4 0.01
70 0.3 < 0.01
99 (Glacial) 0.3 < 0.01
Formic Acid 10 0.3 < 0.01
20 0.6 <0.02
30 0.7 <0.02
40 0.7 <0.02
60 0.5 <0.02
89 0.5 <0.02
Hydrochloric Acid 1 0.8  0.02
2 3  0.08
5 5   0.13
10 7   0.18
15 11   0.28
20 15  0.38
20 20** 0.51**
Phosphoric Acid (Chemically Pure) 10 2 0.05
30 3 0.08
50 6 0.15
85 25 0.63
Sulfuric Acid 2 0.5 < 0.02
5 3 0.08
10 2 0.05
20 0.7 < 0.02
30 0.7 < 0.02
40 0.9 < 0.03
50 1 0.03
50 2** 0.05**
50 1*** 0.03***
60 2 0.05
70 9 0.23

*Determined in laboratory tests of 120 hours duration. It is not recommended that samples be tested under actual plant conditions, All test specimens were treated at 1950°F (1066°C), water quelched unless otherwise notes.    **As gas tungsten arc welded.    ***Aged 48 hours at 1000°F (538°C).

Corrosion Data in Boiling Percent HCI, Cold Reduced Sheet
Cold Reduction, percent Average Corrosion Rate Per  Year Hardness, Rockwell
mils mm
(as solution heat-treated) 14 0.36 B-92
10 14 0.36 C-32
20 14 0.36 C-38
30 13 0.33 C-43
40 14 0.36 C-44
50 14 0.36 C-45

Average Formability

Form Condition Average Olsen Depth
Sheet, 0.063 in. (1.6 mm) thick Heat-treaded at: 1950°F ( 1066°C), rapid quenched in. mm
0.57 14.5

 

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