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GB 3Cr18Mn12Si2N Details

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3Cr18Mn12Si2N Application:Heat-resisting steel bars

Category Type Grade Microstructure Designations
Grades Stainless Steels 3Cr18Mn12Si2N Austenite China - GB , GB/T 1221 (1992) - Heat-resisting steel bars

Chemical composition(wt.%) of 3Cr18Mn12Si2N grade: GB/T 1221 (1992)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.22 0.30
Si 1.40 2.20
Mn 10.50 12.50
P - 0.35
S - 0.03
Cr 17.00 19.00
N 0.22 0.33
3Cr18Mn12Si2N

Mechanical properties of grade 3Cr18Mn12Si2N GB/T 1221 (1992)

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)
449 (≥) 459 (≥) 32 22 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 341

Physical properties of grade 3Cr18Mn12Si2N GB/T 1221 (1992)

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
199 (≥) 293 (≥) 14 32 12 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
613 412 333

3Cr18Mn12Si2N - 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
0Cr18Ni9 GB China
Seamless stainless steel tubes for boiler and heat exchanger
0Cr18Ni9Cu3 GB China
Stainless steel bars
3Cr18Mn12Si2N GB China
Heat-resisting steel bars

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