Czech Republic · CSN

G 20 Mn 5

CSN EN 10213 — Steel castings for pressure purposes

Chemical composition

wt% · log scale

min – max range
typical value

Mechanical properties

value range by condition

Physical properties

vs. temperature

Mean thermal expansion 10⁻⁶/K

Chemical composition

Element	min	max	Similar	Remarks
C	0.17	0.23
Cr		0.3
Cu		0.3
Mn	1	1.6
Mo		0.12
Ni		0.8
P		0.02
S		0.02		For casting of ruling t < 28mm
Si		0.6
V		0.03

Mechanical properties

Heat treatment / condition	Yield strength	Tensile strength	Elongation	Reduction of area	Impact energy	Hardness
castings, <= 100 mm	≥300	500–650	≥22
castings +N					≥27 Charpy V Notch (-30°C)
castings +N, <= 30 mm	≥300	480–620	≥20
castings +QT					≥27 Charpy V Notch (-40°C)

Physical properties

Temperature

20.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
			460.00		7.80

50.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
		45.00

100.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
	13.00

300.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
	13.80

500.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
	15.00

Typical physical values

Density	Elastic modulus	Poisson's ratio	Remarks
7.86	203.00	0.27–0.30	Typical properties for low-carbon, low-alloy steel. These values are not taken from the standard; they are indicative and must not be used for design.

High/low temperature

Impact energy Kv/Ku (J)

Condition	Temperature ℃	min	Remarks
castings quenched and tempered +QT	-40	27	Charpy V Notch
castings normalized +N	-30	27	Charpy V Notch

Similar grades

Grade	Region	System
1.6220	Italy	UNI
G 20 Mn 5	Italy	UNI
G 20 Mn 5	Spain	UNE
1.6220	Romania	STAS
G 20 Mn 5	Romania	STAS
1.6220	Sweden	SS
G 20 Mn 5	Sweden	SS
G 20 Mn 5	Switzerland	SNV
1.6220	Finland	SFS
G 20 Mn 5	Finland	SFS
1.6220	Poland	PN
G 20 Mn 5	Poland	PN
1.622	Austria	ONORM
G 20 Mn 5	Austria	ONORM
1.6220	Norway	NS
G 20 Mn 5	Norway	NS
1.622	Belgium	NBN
G 20 Mn 5	Belgium	NBN
1.6220	Hungary	MSZ
G 20 Mn 5	Hungary	MSZ
1.6220	Germany	DIN
G 20 Mn 5	Germany	DIN
1.622	Bulgaria	BDS
G 20 Mn 5	Bulgaria	BDS
1.6220	United Kingdom	B.S.
G 20 Mn 5	United Kingdom	B.S.
1.6220	France	AFNOR NF
G 20 Mn 5	France	AFNOR NF
1.6220	Czech Republic	CSN