B.S. HR55

Grades | Stainless Steels | HR55

B.S. HR55

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HR55 Application:Specification for nickel-iron-chromium-molybdenum-aluminium-titanium heat-resisting alloy billets, bars, forgings and parts (Ni/Co 43.5, Cr 16.5, Mo 3.3, Al 1.2, Ti 1.2, Fe remainder)

Chemical composition(mass fraction)(wt.%) of the HR55
Elements Min.（≥） Max.（≤） Similar Remarks
C 0.04 0.08
Si - 0.50
Mn - 0.20
P - -
S - 0.015
Cr 15.50 17.50
Ni 42.00 45.00
Mo 2.80 3.80
Co - 2.00
Ti 1.10 1.30
Fe - remaining
Al 1.10 1.30
Cu - 0.50
B - 0.005
Pb - 0.0015
Bi - 0.0001
Ag - 0.0005
Zr 0.01 0.04

Mechanical properties of grade HR55

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition HBW
622 (≥) 259 (≥) 42 13 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 442

Physical properties of grade HR55

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm
193 (≥) 556 (≥) 31 34 32 Solution and Aging, Annealing, Ausaging, Q+T,etc
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2		 - - -
373 718 634 - - -

HR55 Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED