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B.S. HR4 Details

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HR4 Application:Steel plate, sheet and strip. Carbon and carbon-manganese plate, sheet and strip. Specification for hot rolled steel plate, sheet and wide strip based on formability

Category Type Grade Designations
Grades Stainless Steels HR4 UK - B.S. , BS 1449-1-1.2 - Steel plate, sheet and strip. Carbon and carbon-manganese plate, sheet and strip. Specification for hot rolled steel plate, sheet and wide strip based on formability

Chemical composition(wt.%) of HR4 grade: BS 1449-1-1.2

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.12 0.20
Si - 1.00
Mn - 1.00
P - -
S - 0.015
Cr 14.00 16.00
Ni - remaining
Mo 3.00 5.00
Co 13.00 15.50
Ti 3.50 4.50
Fe - 1.00
Al 4.50 5.50
Cu - 0.20
B 0.0100 0.0250
Bi - 0.0001
Pb - 0.0015
Ag - 0.0005
Zr - 0.15
Steel plate, sheet and strip. Carbon and carbon-manganese plate, sheet and strip. Specification for hot rolled steel plate, sheet and wide strip based on formability

Mechanical properties of grade HR4 BS 1449-1-1.2

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
874 (≥) 968 (≥) 42 43 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 234

Physical properties of grade HR4 BS 1449-1-1.2

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
773 (≥) 611 (≥) 21 24 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 332
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
141 725 893

HR4 - Form of Supply

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

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
HR4 B.S. UK
Steel plate, sheet and strip. Carbon and carbon-manganese plate, sheet and strip. Specification for hot rolled steel plate, sheet and wide strip based on formability
HR40 B.S. UK
Specification for cobalt-chromium-tungsten-nickel-manganese heat-resisting alloy billets, bars and forgings (cobalt base Cr 20, W 15, Ni 10, Mn 1.5)
2HR401 B.S. UK
Specification for nickel-chromium-titanium-aluminium heat-resisting alloy seamless tubes (Nickel base, Cr 19.5, Ti 2.2, Al 1.4)
HR402 B.S. UK
Specification for nickel-chromium-cobalt-titanium-aluminium heat-resisting alloy seamless tubes (Nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5)
HR403 B.S. UK
Specification for nickel-chromium-titanium heat-resisting alloy cold-worked and softened seamless tubes (nickel base, Cr 19.5, Ti 0.4)
HR404 B.S. UK
Specification for nickel-cobalt-chromium-molybdenum-titanium-aluminium heat-resisting alloy cold worked solution treated seamless tubes (nickel base, Co 20, Cr 20, Mo 5.9, Ti 2.1, Al 0.5)

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