SB-668 N08028 Stainless Steels to SB-668

SB-668 N08028 - Specification & Application

  • SB-668 - UNS N08028 Seamless Pipe and Tube

UNS N08028 Seamless Pipe and Tube

Chemical composition(wt.%) of SB-668 N08028 grade: to SB-668

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.02
Mn - 2.00
Si - 1.00
P - 0.02
S - 0.015
Cr 26.00 28.00
Ni 29.50 32.50
Mo 3.00 4.00
Cu 0.60 1.40

SB-668 N08028 - Detail

UNS N08028 Seamless Pipe and Tube

Mechanical properties of grade SB-668 N08028 SB-668

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)
144 (≥) 295 (≥) 44 23 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

Physical properties of grade SB-668 N08028 SB-668

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
754 (≥) 945 (≥) 44 24 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 311
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
861 743 187
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