HASTELLOY B-2 Plate vs Sheet Mechanical Properties

Designation
UNS number	N10665
US name	ASTM Grade N10655
EN number	2.4617

Mechanical Properties Comparison – HASTELLOY B-2 Plate vs Sheet

Property	Plate	Sheet
Yield Strength	360-525 MPa	470-580 MPa
Tensile Strength	805-995 MPa	865-1070 MPa
Elongation	50-70%	40-65%
Vickers Hardness (HV)	180-250 HV	220-280 HV
Rockwell B Hardness (HRB)	87-99 HRB	95-103 HRB
Rockwell C Hardness (HRC)	6-22 HRC	16-27 HRC
Brinell Hardness (HB)	172-236 HB	207-265 HB
Fracture Toughness	342-380 MPa·m^0.5	296-328 MPa·m^0.5
Toughness (G)	540-669 kJ/m²	404-500 kJ/m²
Fatigue Strength (10⁷ cycles)	320-500 MPa	345-535 MPa
Elastic Stored Energy	309-620 kJ/m³	516-773 kJ/m³
Young’s Modulus	209-223 GPa	209-223 GPa
Shear Modulus	75-90 GPa	75-90 GPa
Bulk Modulus	170-210 GPa	170-210 GPa
Poisson’s Ratio	0.3-0.32	0.3-0.32

Toughness Comparison – HASTELLOY B-2 Plate vs Sheet

Property	Plate	Sheet
Fracture Toughness	342-380 MPa.m^0.5	296-328 MPa.m^0.5
Impact Toughness (G)	540-669 kJ/m^2	404-500 kJ/m^2

Plate has significantly better fracture toughness and impact energy capacity.

Sheet is slightly lower in both, indicating reduced resistance to crack propagation and sudden impacts.

Analysis:

Strength & Hardness: The sheet form exhibits higher yield and tensile strengths, as well as greater hardness values across Vickers, Rockwell, and Brinell scales. This suggests that sheets are more resistant to deformation and wear.

Ductility: Plates have higher elongation percentages, indicating better ductility, which makes them more suitable for applications requiring significant forming or bending.

Fracture Toughness: Plates demonstrate higher fracture toughness, meaning they can absorb more energy before fracturing, which is beneficial in applications where impact resistance is critical.

Fatigue Resistance: Sheets have slightly better fatigue strength and higher elastic stored energy, making them preferable for applications involving cyclic loading.

Conclusion:

Choose Plate: When the application demands higher ductility and impact resistance, such as in components subjected to sudden loads or requiring significant forming.

Choose Sheet: For applications that require higher strength, hardness, and better performance under cyclic loading conditions.

These distinctions are crucial when selecting the appropriate form of Hastelloy B-2 for specific engineering applications