Steel · Stainless steel, austenitic · isotropic

1.4318 (X2CrNiN18-7)

Name: 1.4318 (X2CrNiN18-7) — material properties (EN 1993-1-4 · EN 10088)
Creator: BadgerMecX

EN 1993-1-4 · EN 10088 · annealed (nominal design values) · also X2CrNiN18-7

1.4318 (X2CrNiN18-7) is an austenitic stainless steel to EN 1993-1-4 · EN 10088. Its nominal yield strength is 330–350 MPa, depending on the product form and thickness. E = 200 GPa, ν = 0.3 and α = 16 × 10⁻⁶/K (design values).

Record: stainless-14318
Library: v1.1.0
Properties: 10
Sources: 2
Build check: passed ✓
Viewing as: guest

E · Young's modulus 200GPa design^[1]

ν · Poisson's ratio 0.3– design^[1]

f_y · Yield strength (R_eH / R_p0.2) 350MPa nominal^[1]C · t ≤ 8 mm

f_u · Tensile strength (R_m) 650MPa nominal^[1]C · t ≤ 8 mm

ρ · Density 7900kg/m³ typical^[2]

α · Coefficient of thermal expansion 1610⁻⁶/K typical^[2]

λ · Thermal conductivity 15W/(m·K) typical^[2]

c_p · Specific heat capacity 500J/(kg·K) typical^[2]

Elastic constants

isotropic

Symbol	Property	Value	Unit	Basis	Ref.
E	Young's modulus ⓘ EN 1993-1-4 2.1.3	200	GPa	design	[1]
ν	Poisson's ratio	0.3	–	design	[1]
G	Shear modulus ⓘ G = E/(2(1 + ν)); SCI P413 rounds it to 76.9 GPa for 200 GPa	76.92	GPa	derived	[1]
K	Bulk modulus K = E / 3(1 − 2ν)	166.7	GPa	derived	—
λ_L	Lamé constant λ_L = Eν / (1 + ν)(1 − 2ν)	115.4	GPa	derived	—
c₀	Bar wave speed c₀ = √(E/ρ)	5032	m/s	derived	—

Physical, thermal and electrical

at 20 °C

Symbol	Property	Value	Unit	Basis	Ref.
ρ	Density ⓘ EN 10088-1 values as quoted by Outokumpu	7900	kg/m³	typical	[2]
α	Coefficient of thermal expansion ⓘ mean, 20–100 °C	16	10⁻⁶/K	typical	[2]
λ	Thermal conductivity ⓘ at 20 °C	15	W/(m·K)	typical	[2]
c_p	Specific heat capacity ⓘ at 20 °C	500	J/(kg·K)	typical	[2]
ρ_e	Electrical resistivity ⓘ at 20 °C	0.73	µΩ·m	typical	[2]
a	Thermal diffusivity a = λ / (ρ·c_p)	3.797	mm²/s	derived	—

Strength

a band applies up to and including its upper limit

Property	Product form	Thickness	Value	Unit	Basis	Ref.
f_y	C — cold rolled strip	t ≤ 8 mm	350	MPa	nominal	[1]
f_y	H — hot rolled strip	t ≤ 13.50 mm	330	MPa	nominal	[1]
f_y	P — hot rolled plate	t ≤ 75 mm	330	MPa	nominal	[1]
f_u	C — cold rolled strip	t ≤ 8 mm	650	MPa	nominal	[1]
f_u	H — hot rolled strip	t ≤ 13.50 mm	650	MPa	nominal	[1]
f_u	P — hot rolled plate	t ≤ 75 mm	630	MPa	nominal	[1]

Symbol	Property	Value at t = 8 mm · C	Unit	Basis	Ref.
f_y	Yield strength (R_eH / R_p0.2) ⓘ 0.2 % proof strength, EN 1993-1-4 Table 2.1	350	MPa	nominal	[1]
f_u	Tensile strength (R_m)	650	MPa	nominal	[1]

Sources

every value names one

EN 1993-1-4:2006+A1:2015, Eurocode 3 — Stainless steels, Table 2.1 and 2.1.3Copies checked: 1, 2
EN 10088-1, Stainless steels — List of stainless steels, physical properties (as quoted by Outokumpu datasheets)Copies checked: 1, 2, 3, 4

min product standard minimum char characteristic design code value for design typical datasheet or textbook derived worked out here, formula shown

Cite this page

for reports and papers

BadgerMecX Materials (2026). 1.4318 (X2CrNiN18-7) — material properties, EN 1993-1-4 · EN 10088. Library v1.1.0, record stainless-14318. https://badgermecx.com/materials/stainless-14318/ (accessed 2026-10-08).

@misc{badgermecx_stainless14318,
  title  = {1.4318 (X2CrNiN18-7) -- material properties, EN 1993-1-4 · EN 10088},
  author = {{BadgerMecX Materials}},
  year   = {2026},
  note   = {Library v1.1.0, record stainless-14318},
  url    = {https://badgermecx.com/materials/stainless-14318/}
}

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