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ISO X21Cr13 Application:High temperature bainite and martensite steel ISO standard internal combustion engine
Category Type Steel grade Standard Country
Grades Special Alloy ISO X21Cr13 ISO ISO

Chemical composition % of the ladle analysis of grade ISO X21Cr13

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%)
0.09-0.15 Max 1.00 Max 1.00 Max 0.04 Max 0.03 11.5-14.0 Max 1.00
High temperature bainite and martensite steel ISO standard internal combustion engine
Mechanical properties of grade ISO X21Cr13
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)
628 (≥) 485 (≥) 33 32 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 222
Physical properties of grade ISO X21Cr13
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
711 (≥) 289 (≥) 34 11 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 244
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
786 876 352
ISO X21Cr13 Range of products
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
X21Cr13 ISO ISO
Wrought steels for use at elevated temperatures in engines
X21Cr13 ISO ISO
Tools high alloyed Cr steel

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