Germany · DIN

StE 355

DIN 17125:1997 — Square and rectangular fine grain steel tubes (hollow sections) for structural steelwork; technical delivery conditions

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DIN 17103:1989DIN 17103
DIN 17179:1986Seamless circular tubes of fine grain steels for special requirements; technical delivery conditions
DIN 17178:1986Welded circular tuber of fine grain steels for special requirements; technical delivery conditions
DIN 17102:1983DIN 17102
DIN 17125:1997Square and rectangular fine grain steel tubes (hollow sections) for structural steelwork; technical delivery conditions
DIN 17123:1997DIN 17123
DIN 17124:1986DIN 17124
DIN 17123:1986DIN 17123

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Element	min	max	Similar	Remarks
Al	0.02		If nitrogen is additionally fixed by niobium	If nitrogen is additionally fixed by niobium
C		0.2
Cr		0.3
Cr+Cu+Mo		0.45
Cu		0.2
Mn	0.9	1.65
Mo		0.08
N		0.02
Nb		0.05
Nb+Ti+V		0.12
Ni		0.3	The value for Nickel may be at max0	The value for Nickel may be at max0
P		0.035
S		0.03
Si	0.1	0.5
V		0.1

Heat treatment / condition	Yield strength	Tensile strength	Elongation	Reduction of area	Impact energy	Hardness
hollow bars, normalized, t <= 20 mm	≥355 Upper Yield Stress	490–630	≥22 Parallel to the tube axis		≥39 Charpy V Notch (-20°C)

Temperature

-100.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
217.00	10.80	37.60	371.00	0.18

0.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
213.00	11.70	41.60	451.00	0.24

20.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
212.00	11.90	42.20	461.00	0.25	7.83

100.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
207.00	12.50	43.20	496.00	0.30

200.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
199.00	13.00	42.90	533.00	0.37

300.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
192.00	13.60	41.20	568.00	0.45

400.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
184.00	14.10	39.10	611.00	0.56

500.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
175.00	14.50	36.60	677.00	0.67

600.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
164.00	14.90	34.10	778.00	0.81

Density	Elastic modulus	Poisson's ratio	Remarks
7.86	203.00	0.27–0.30	低碳，低合金钢的典型性能数值。此值不来源于标准，它是指示性指标，不能被用于设计用途。

Impact energy Kv/Ku (J)

Condition	Temperature ℃	min	Remarks
bars normalized t <= 20 mm	-20	39	Charpy V Notch

Grade	Region	System
StE 355	Germany	SEW
1.0562	Germany	DIN