Czech Republic · CSN

X 20 Cr 13

CSN EN 10151 — Stainless steel strip for springs; technical delivery conditions

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Standards

CSN EN 10088-3Stainless steels - Part 3: Technical delivery conditions for semi-finished products,bars,rods and sections for general purposes
CSN EN 10088-5Stainless steels. Part 5:Technical delivery conditions for bars,rods,wire,sections and bright products of corrosion resisting steels for construction purposes
CSN EN 10088-2CSN EN 10088-2
CSN EN 10088-4Stainless steels. Part 4:Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for construction purposes
CSN EN 10250-4Open die steel forgings for general engineering purposes - Part 4 : stainless steels
CSN EN 10151Stainless steel strip for springs; technical delivery conditions
CSN EN 10088-1Staehle Stainless steels. Part 1:List of stainless steels

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Chemical composition

wt% · log scale

min – max range
typical value

Mechanical properties

value range by condition

Physical properties

vs. temperature

Elastic modulus GPa

Mean thermal expansion 10⁻⁶/K

Thermal conductivity W/(m·K)

Specific heat J/(kg·K)

Resistivity Ω·mm²/m

Density kg/dm³

Chemical composition

Element	min	max
C	0.16	0.25
Cr	12	14
Mn		1.5
P		0.04
S		0.015
Si		1

Mechanical properties

Heat treatment / condition	Yield strength	Tensile strength	Elongation	Reduction of area	Impact energy	Hardness
steel strip +C700		700–850
steel strip +C850		850–1000
steel strip, annealed		500–700

Physical properties

Temperature

20.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
210.00；220.00；215.00；216.00		30.00；25.10	460.00	0.60	7.70

100.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
212.00；213.00	10.50

200.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
205.00；207.00	11.00	26.50	500.00	0.69

300.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
200.00	11.50

400.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
192.00；190.00	12.00	27.70	590.00	0.86

500.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
	12.00

600.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
		27.40	720.00	1.03

800.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
		25.00	860.00	1.17

Typical physical values

Density	Elastic modulus	Poisson's ratio	Remarks
7.61–8.10	190.00–215.00	0.27–0.30	Typical material properties for stainless steel. These values are not taken from the standard; they are indicative and must not be used for design.
7.86	190.00–210.00	0.27–0.30	Material properties for low-carbon, high-alloy steel. These values are not taken from the standard; they are indicative and must not be used for design.

Fatigue

Condition

1. Forging; Thickness: <= 160mm; quenched and tempered (QT700); Reversed bending; T: 20°C; -

Test conditions

Item	Detail
Product	forging; Thickness: <= 160mm; +QT700
Experiment	Reversed bending; T: 20°C
Specimen

Monotonic

Property	Value
Yield strength (MPa)	500.0
Tensile strength (MPa)	700.0 850.0
Elongation (%)	13.0

Stress life

No.	Cycles
1	1E7

Item	Detail
Product	forging; Thickness: <= 160 mm; +QT800
Experiment	Reversed bending; T: 20°C
Specimen

Property	Value
Yield strength (MPa)	600.0
Tensile strength (MPa)	800.0 950.0
Elongation (%)	12.0

Heat treatment

Type	1
Heat-treatment curve	Hardness-Tempering
Heat-treatment curve	CCT modified
Heat-treatment curve	CCT
Heat-treatment curve	TTT

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