1.4418 (X4CrNiMo16-5-1)

Classification

Country	Section	Category
Country	Section	Category
Germany	Stainless and Heat Resisting Steels	Stainless Steel with Ni > = 2.5% with Mo but without Nb and Ti

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %	N, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %	N, %
	73.165–80.2	< 0.7	< 1.5	15–17	4–6	< 0.04	< 0.06	< 0.015	0.8–1.5	< 0.02

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Physical characteristics

Temperature, °C	$$E\cdot 10^{9}$$, $$MPa$$	$$\alpha\cdot 10^{6}$$, $$K^{-1}$$	$$\varkappa$$, $$\frac{W}{m\cdot K}$$	$$\rho$$, $$\frac{kg}{m^3}$$	$$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$	$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
Temperature, °C	$$E\cdot 10^{9}$$, $$MPa$$	$$\alpha\cdot 10^{6}$$, $$K^{-1}$$	$$\varkappa$$, $$\frac{W}{m\cdot K}$$	$$\rho$$, $$\frac{kg}{m^3}$$	$$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$	$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20	200		15	7700	0.43	0.8
100		10.3
200		10.8
300		11.2
400		11.6

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$$\sigma _{U}$$, $$MPa$$	$$\sigma_{0.2}$$, $$MPa$$	$$\epsilon_L$$, %	$$\epsilon_T$$, %	$$KV_{L}$$, $$J$$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$$\sigma _{U}$$, $$MPa$$	$$\sigma_{0.2}$$, $$MPa$$	$$\epsilon_L$$, %	$$\epsilon_T$$, %	$$KV_{L}$$, $$J$$	Treatment
				moderate hardening	760–1100	550–700	16	14	55–90
				annealing, soft	1100

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
		annealing, soft	320

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Ni	%	Nickel
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Mo	%	Molybdenum
N	%	Nitrogen

Description of physical characteristics

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$$E\cdot 10^{9}$$	$$MPa$$	Elastic modulus
$$\alpha\cdot 10^{6}$$	$$K^{-1}$$	Coefficient of thermal (linear) expansion (range 20°C–T)
$$\varkappa$$	$$\frac{W}{m\cdot K}$$	Coefficient of thermal conductivity (the heat capacity of the material)
$$\rho$$	$$\frac{kg}{m^3}$$	The density of the material
$$c\cdot 10^{-3}$$	$$\frac{J}{kg\cdot K}$$	The specific heat of the material (range 20°C–T)
$$R\cdot 10^{-6}$$	$$\Omega\cdot m$$	Electrical resistivity

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$$\sigma_{0.2}$$	$$MPa$$	Tensile stress required to produce a total elongation of 0.2%
$$\sigma _{U}$$	$$MPa$$	Ultimate tensile strength
$$\epsilon_L$$	%	Elongation at break (longitudinal)
$$\epsilon_T$$	%	Elongation at break (transverse)
$$KV_{L}$$	$$J$$	Impact energy (longitudinal)