HR4 Stainless Steels to BS 1449-1-1.2

HR4 - Specification & Application

  • 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

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: to 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

HR4 - Detail

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)
721 (≥) 428 (≥) 23 34 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 311

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
355 (≥) 318 (≥) 44 42 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 442
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
631 725 619

Equivalent Products

We can customize the production of HR4 grade, contact us for the best solution.
sales@specificsteel.com