Location » Home » Grades > Aviation and Aero Steel > Z12CN18-10 Air 9160/C

AFNOR Z12CN18-10 Air 9160/C Details

Z12CN18-10 Air 9160C wrought steels used in aeronautical constructions

Stainless, non-magnetic spring steel with high carbon content with good ductility delivered in the form of cold rolled tapes, sheets, drawn wires and drawn bars.Designed for springs, spring washers, ropes, flexible connectors, fasteners, aerial parts and other components used in the chemical and food industries such as pump parts, acid tanks, or high temperature springs.1.4310 grade exhibits resistance to amorphous corrosion, but in delivered condition and in the sensitized state it is not resistant to intergranular corrosion. The steel is delivered in a soft and strengthened by cold work condition, exhibiting the following mechanical properties according to user requirements as described. Supersaturation of X10CrNi18-10 grade products is carried out at 1000-1100 ℃. Forging and rolling processes require a temperature of 1200 - 900 ℃.For Austenitic steel 1H18N9, it is similar to X10CrNi18-10 with a slightly narrower carbon range - max 0.12%, thus showing slightly better mechanical properties than 0H18N9 steel according to PN. It is characterized by good durability, compactness, relatively low plasticity, tendency to cold-work hardening, and adequate polishing ability while maintaining resistance to compounds and substances of 0H18N9 steel.Steel is resistant to intercrystalline corrosion if no welding, hot bending, or strengthening by cold work was performed on the product. It also exhibits resistance to compounds contained in fertilizers, nitric acid, aggressive preservatives and various salts. It is not resistant to non-oxidant environments, pitting and contact corrosion (halides), stress corrosion in contact with chlorides and hydroxides.It is used in the food, fruit and vegetable and chemical industries in nitrogen plants for valves, parts of fittings and pumps, the coal industry and the petrochemical industry. Other applications include distillation boilers, agitators, acid tanks, heat exchangers, absorption towers, and pipelines. It shows very good weldability, where no early heating of the product is required. However, after the joining of the components, it is advisable to carry out the supersaturation process to protect the product against intercrystalline corrosion.

Mechanical properties at individual working temperatures:

  • Coefficient of linear expansion α (10-6 ⋅ K-1
    • at the temperature 100℃ = 16
    • at the temperature 200℃ = 17
    • at the temperature 300℃ = 17
    • at the temperature 400℃ = 18
    • at the temperature 500℃ = 18
  • Modulus of elasticityE (GPa) 
    • at the temperature 100℃ = 194
    • at the temperature 200℃ = 186
    • at the temperature 300℃ = 179
    • at the temperature 400℃ = 172
    • at the temperature 500℃ = 165

AFNOR Z12CN18-10 Air 9160/C Standard Download


Z12CN18-10 Air 9160/C Application:wrought steels used in aeronautical constructions
Category Type Grade Designations
Grades Aviation and Aero Steel Z12CN18-10 Air 9160/C France - AFNOR , AIR 9160 C - wrought steels used in aeronautical constructions
EN 10088-1 -
EN 10151 -
EN 10088-3 -
Chemical composition(mass fraction)(wt.%)
Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.15
Si - 1.00
Mn - 2.00
P - 0.035
S - 0.025
Cr 17.00 20.00
Ni 8.00 11.00
Mechanical properties of grade Z12CN18-10 Air 9160/C
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)
525 (≥) 344 (≥) 41 12 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 232
Physical properties of grade Z12CN18-10 Air 9160/C
Property Density
Temperature T
Specific heat
J / kgK
Thermal conductivity
Electric resistance
Modulus of elasticity
Expansion rate
262 (≥) 819 (≥) 14 43 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 333
Creep strain limit
(Rp1,0) N/mm2
Creep rupture strength
(Rp1,0) N/mm2
121 717 155
Z12CN18-10 Air 9160/C 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
Z12CN18-10 Air 9160/C AFNOR France
wrought steels used in aeronautical constructions