321F20 Stainless Steels to NF A 49-214

321F20 - Specification & Application

  • NF A 49-214 - Steel tubes. Seamless austenitic steel tubes for use at high temperatures. Dimensions (with normal tolerances). Technical conditions of delivery

Steel tubes. Seamless austenitic steel tubes for use at high temperatures. Dimensions (with normal tolerances). Technical conditions of delivery

Chemical composition(wt.%) of 321F20 grade: to NF A 49-214

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.04 0.08
Si - 1.00
Mn - 2.00
P - 0.040
S - 0.030
Cr 17.00 19.00
Ni 11.00 13.00
Mo - -
B 0.0015 0.0060
Ti 4×C 0.60

321F20 - Detail

Steel tubes. Seamless austenitic steel tubes for use at high temperatures. Dimensions (with normal tolerances). Technical conditions of delivery

Mechanical properties of grade 321F20 NF A 49-214

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)
855 (≥) 483 (≥) 14 21 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 242

Physical properties of grade 321F20 NF A 49-214

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
444 (≥) 567 (≥) 22 43 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 443
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
716 383 656

Equivalent Products

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