Hastelloy Vs Monel

Hastelloy Vs Monel

Hastelloy is one the most versatile alloys to be used in many in many industrial applications. The material composition has chromium, carbon, cobalt, tungsten, molybdenum, vanadium, aluminum, titanium, niobium, iron, copper, nickel and other elements. There are different grades of hastelloys that have different composition. Some of the grades are Alloy C, C4, B, B2, C276 and so on. Monel on the other hand is a nickel copper alloy that has prominently nickel and copper in the composition with silicon, manganese, carbon, and iron.

Difference Between Hastelloy And Monel Material Price

The Hastelloy materials are more expensive than monel due to the composition. Although the primary reason for the cost is the raw material consumption, the production methods for hastelloys are also sophisticated and add up to the price. Monel is also expensive compared to ordinary stainless steel materials but is cheaper compared to the Hastelloy grades.


Nickel Content In Hastelloy And Monel

The nickel content in Monel grades range up to 67% where the copper content can range up to 60% in cupronickel grades. The Hastelloy grades can contain up to 71% nickel in the composition with high molybdenum up to 16%, chromium up to 22% and other elements as well. This is what makes the material stronger and corrosion resistant than most other alloys.


How To Identify Hastelloy And Monel

It is difficult to identify brand new metallic products from each other when they are polished and have the same surface coloration. Nickel alloys including Hastelloy have a silvery coloration where the Monel can display a yellowish green tinge or hue on the edges. However, the best way to identify each other separately is to look at the unified number systems (UNS) which would designate them separately.


Hastelloy And Monel Melting Point

Hastelloy and monel grades have similar melting points up to 1350 degrees Celsius. However, there are slight difference based on the grade and the material composition. Although the melting points are similar, the heat resistance capacity of Hastelloy grades is higher than that of the monel grades.


Hastelloy And Monel Yield Strength

Hastelloy has yield strengths up to 364MPa. The monel grades have yield strengths up to 345MPa. So the Hastelloy grades are generally stronger than the monel grades.

Monel And Hastelloy Ultimate Tensile Strength

The tensile strength of the Monel grades are also lower than that of the Hastelloy grades. The monel has up to 620MPa minimum tensile strength where the Hastelloy has up to 826MPa minimum tensile strength.Both the materials are used in medical equipment, material handling, compressors, petrochemical industries, packaging, architectural designs, mining equipment, fluid processing equipment, marine and aerospace applications as well. Specific grades are preferred for unique applications.

 

material grades of Hastelloy
  • HASTELLOY B2 ®
  • HASTELLOY C ®
  • HASTELLOY C276 ®
  • HASTELLOY N ®
  • HASTELLOY S ®
  • HASTELLOY W ®
  • HASTELLOY X ®

 

mechanical strength of Hastelloy
  DENSITY MELTING POINT TENSILE STRENGTH YIELD STRENGTH (0.2%OFFSET) ELONGATION
C22 8.69 g/cm3 1399 °C (2550 °F) Psi – 1,00,000 , MPa – 690 Psi – 45000 , MPa – 310 45 %
C276 8.89 g/cm33 1370 °C (2500 °F) Psi – 1,15,000 , MPa – 790 Psi – 52,000 , MPa – 355 40%
B2 9.2 g/cm3 1370 °C (2550 °F) Psi – 1,15,000 , MPa –760 Psi – 52,000 , MPa – 350 40%
B3 9.2 g/cm3 1370 °C (2550 °F) Psi – 1,15,000 , MPa –760 Psi – 52,000 , MPa – 350 40%
C4 8.64 g/cm3 1350-1400 °C 783 365 55%
Hybrid BC1 8.83 g/cm³ 1343 - 1443°C 725 310 40%
X 8.22 g/cm³ 1355°C 655 MPa 240 MPa 35%

 

Material equivalent grade of Hastelloy
STANDARD WERKSTOFF NR. UNS GOST AFNOR JIS OR EN
Hastelloy C22 2.4602 N06022 - - NW 6022 - NiCr21Mo14W
Hastelloy C276 2.4819 N10276 ХН65МВУ - NW 0276 ЭП760 NiMo16Cr15W
Hastelloy B2 2.4617 N10665          
Hastelloy B3 2.4600 N10675          
Hastelloy C4 2.4610 N06455          
Hastelloy C-22HS - N07022          
Hastelloy C2000 2.4675 N06200          
Hastelloy Hybrid BC1 2.4708 N10362          
Hastelloy X 2.4665 N06002  

 

chemical analysis of Hastelloy

Material / Purity (%):

C-276

C-22
Ni 57.0 56.0
Co 2.50 2.50
Cr 15.5 22.0
Mo 16.0 13.0
W 4.00 3.00
Fe 5.50 3.00
Si 0.080 0.080
Mn 1.000 0.500
P 0.025 0.010
S 0.010 0.020
V 0.350 0.350

 

chemical compatibility chart of Monel
ALLOY ASTM/ AISI UNS %AL %CU %MN %NI %TI %FE %SI
Monel 400 B 127, B 164 N04400 28-34 2.0 max 63 min 2.5 max 0.5 max
Monel 401 N04401 28-34 2.0 max 63 min 2.5 max
Monel 404 N04404 0.05 max Rem 0.1 max 52-57 0.5 max 0.1 max
Monel K-500 B 865 N05500 2.3-3.15 27-33 1.5 max 63 min 0.35-0.85 2.0 max 0.5 max
Monel 405 B 164 N04405 28-34 2.0 max 63 min 2.5 max 0.5 max

 

equivalent grade of Monel
ALLOY WERKSTOFF NR. (WNR) UNS AFNOR GOST BS JIS EN
Monel 400 2.4360 N04400 NU-30M МНЖМц 28-2,5-1,5 NA 13 NW 4400 NiCu30Fe
Monel 404 2.4867 N04404          
Monel 405   N04404          
Monel K500 2.4375 N05500  

 

yield and tensile strength of Monel
 ALLOY TENSILE STRENGTH YIELD STRENGTH (0.2%OFFSET) DENSITY MELTING POINT ELONGATION
Monel 400 Psi – 80000 , MPa – 550 Psi – 35000 , MPa – 240 8.8 g/cm3 1350 °C (2460 °F) 40 %
Monel 404 70 KSI min (483 MPA min) 25 KSI min (172 MPA min) 8.91 gm/cm3 1300 - 1350℃ 35 %
Monel 405 550 Mpa 240 Mpa 8.80 g/cm3 1300 - 1350°C 40 %
Monel K500 Psi – 160000 , MPa – 1100 Psi – 115000 , MPa – 790 8.44 g/cm3 1350 °C (2460 °F) 20 %