A 789 S32550 Stainless Steels to A 789/A 789M (2013)

A 789 S32550 - Specification & Application

  • A 789/A 789M (2013) - Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service

Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service

Chemical composition(wt.%) of A 789 S32550 grade: to A 789/A 789M (2013)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.04
Mn - 1.50
Si - 1.00
P - 0.04
S - 0.03
Cr 24.00 27.00
Ni 4.50 6.50
Mo 2.00 4.00
N 0.10 0.25
Cu 1.50 2.50

A 789 S32550 - Detail

Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service

Mechanical properties of grade A 789 S32550 A 789/A 789M (2013)

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)
486 (≥) 867 (≥) 31 33 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 332

Physical properties of grade A 789 S32550 A 789/A 789M (2013)

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
339 (≥) 812 (≥) 44 23 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 434
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
269 554 573
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