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GB 2Cr21Ni12N Details

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2Cr21Ni12N Application:Heat-resisting steel bars

Category Type Grade Microstructure Designations
Grades Stainless Steels 2Cr21Ni12N Austenite China - GB , GB/T 1221 (1992) - Heat-resisting steel bars
GB/T 12773 (1991) - Valve steel bars for internal combustion engines - Technical requirements

Chemical composition(wt.%) of 2Cr21Ni12N grade: GB/T 1221 (1992)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.15 0.28
Si 0.75 1.25
Mn 1.00 1.60
P - 0.35
S - 0.03
Ni 10.50 12.50
Cr 20.00 22.00
N 0.15 0.30
2Cr21Ni12N

Mechanical properties of grade 2Cr21Ni12N 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)
479 (≥) 545 (≥) 12 43 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical properties of grade 2Cr21Ni12N 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
258 (≥) 131 (≥) 33 14 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 441
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
252 988 533

2Cr21Ni12N - 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
2Cr21Ni12N GB China
Heat-resisting steel bars

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