AFCEN Z8 CNDNb 18-12 Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country / Standard: France / AFCEN

Data updates

Latest Update: 2025-08

Total number of updates: 5

Update History

2022-02 2018-07 2018-04 2015-10

This material has 132 properties — only a subset is shown here.

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AFCEN Z8 CNDNb 18-12 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.10

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

16 – 20

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

≤ 1

UNIT

CAS NUMBER

7440-50-8

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-03-1

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-02-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

RCC-M: Design and construction rules for mechanical components of PWR nuclear islands, AFCEN - French association for design, construction and in-service inspection rules for nuclear island components, 2007

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AFCEN Z8 CNDNb 18-12 Physical Properties

Temperature

≤ 0°C 0 - 30°C 30 - 100°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 215 GPa

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Thermal Conductivity

val1 W/(m∙°C)

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Density

val1 kg/dm³

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Poisson Coefficient

val1

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Coefficient of Thermal Expansion (CTE)

val1 10^-6/°C

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This material has 132 properties — only a subset is shown here.

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AFCEN Z8 CNDNb 18-12 Heat Treatments

Final heat treatment for mechanical properties shall consist of solution heat treatment at a temperature between 1050°C and 1150°C.
Final heat treatment for mechanical properties shall consist of solution heat treatment at a temperature between 1050°C and 1150°C.
There are three distinct cases:
a) Plates ≤ 3 mm thick finished by cold rolling
These plates are delivered after cold-rolling, either solution heat-treated, pickled and passivated, or solution heat-treated, pickled, passivated and work-hardened. Sheets and strip may be delivered on spools.
b) Plates > 3 mm thick finished by cold-rolling
These plates shall be delivered after cold-rolling. They shall be solution heat treated pickled and passivated. If work-hardening treatment is necessary, it shall be subject to approval.
c) Plates > 3 mm thick hot-rolled
These plates shall be delivered after hot-rolling. They shall be solution heat treated, pickled and passivated.

AFCEN Z8 CNDNb 18-12 Mechanical Properties

Temperature

0 - 30°C ≥ 300°C

PROPERTY / VALUE

Tensile Strength

≥ 490 MPa

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Brinell Hardness (HB)

126 — 196

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Elongation, A

val1 %

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Yield Strength, Rp0.2

val1 MPa

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Impact Energy

val1 J

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1Cross References

43Composition
36Mechanical Properties
44Physical Properties
4Heat Treatment
-Metallography
-Machinability

2Stress-Strain
1Formability
1Fatigue
-Fracture
-Creep

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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