EN 10217-3 Grade TStE 285 Steel Tubes – Normalized or Normalized Formed (+N)

The fine grain steel TStE 285 is used for special requirements according to DIN 17178 : 1986-5 for welded steel tubes and according to DIN 17179 : 1986-5 for seamless steel tubes. These steel tubes are used above all in pressure vessel construction, apparatus construction, pipe construction, as well as in general machine and equipment construction. The corresponding rules in the procedure manuals have to be complied with, for example Technische Regeln Druckbehälter (TRB) [Technical Rules for Pressure Vessels], Technische Regeln Dampfkessel (TRD) [Technical Rules for Steam Boilers], specifications sheets of the AG-Druckbehälter [Team for Pressure Vessels] (AD-specifications sheets), Technische Regeln brennbare Flüssigkeiten (TRbB) [Technical Rules for Flammable Liquids], Technische Regeln Druckgase (TRG) [Technical Rules for Pressure Gases], Technische Regeln Gashochdruckleitungen (TRGL) [Technical Rules for high-pressure Pipes for Gases]. Special requirements regarding further processing (for example zinc coating, chromium coating or enamelling) have to be negotiated at the time of ordering. For welded tubes, one can assume a 100% use of the allowed calculated stress of the welding seam. TStE 285 can be used in temperature range from -50 up to 400 degrees C.

Properties

General

Property	Temperature	Value
Density	20.0 °C	7.85 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	-100.0 °C	217 GPa
	20.0 °C	212 GPa
	100.0 °C	207 GPa
	200.0 °C	199 GPa
	300.0 °C	192 GPa
	400.0 °C	184 GPa
	500.0 °C	175 GPa
	600.0 °C	164 GPa

Elongation	20.0 °C	24 %
Elongation, transverse	20.0 °C	22 %
Poisson's ratio	23.0 °C	0.29 [-]	Typical for Low Carbon Steel
Shear modulus	23.0 °C	82 GPa	Typical for Low Carbon Steel
Tensile strength	20.0 °C	390 - 510 MPa
Tensile strength, transverse	20.0 °C	390 - 510 MPa
Yield strength	20.0 °C	275 - 285 MPa
Yield strength, transverse	20.0 °C	275 - 285 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	-100.0 °C	1.08E-5 1/K
	20.0 °C	1.19E-5 1/K
	100.0 °C	1.25E-5 1/K
	200.0 °C	1.3E-5 1/K
	300.0 °C	1.36E-5 1/K
	400.0 °C	1.41E-5 1/K
	500.0 °C	1.45E-5 1/K
	600.0 °C	1.49E-5 1/K

Max service temperature		500 °C	Typical for Carbon Steel
Max service temperature, long		-50 - 400 °C
Melting point		1480 - 1526 °C	Typical for Low Carbon Steel
Specific heat capacity	-100.0 °C	423 J/(kg·K)
	20.0 °C	461 J/(kg·K)
	100.0 °C	479 J/(kg·K)
	200.0 °C	499 J/(kg·K)
	300.0 °C	517 J/(kg·K)
	400.0 °C	536 J/(kg·K)
	500.0 °C	558 J/(kg·K)
	600.0 °C	587 J/(kg·K)

Thermal conductivity	-100.0 °C	52.6 W/(m·K)
	20.0 °C	53.4 W/(m·K)
	100.0 °C	53.3 W/(m·K)
	200.0 °C	50.1 W/(m·K)
	300.0 °C	46.9 W/(m·K)
	400.0 °C	43.2 W/(m·K)
	500.0 °C	39.5 W/(m·K)
	600.0 °C	36.1 W/(m·K)

Thermal diffusivity	-100.0 °C	18 mm²/s
	20.0 °C	14.8 mm²/s
	100.0 °C	13.7 mm²/s
	200.0 °C	12.1 mm²/s
	300.0 °C	10.6 mm²/s
	400.0 °C	9.2 mm²/s
	500.0 °C	7.6 mm²/s
	600.0 °C	6.1 mm²/s

Electrical

Property	Temperature	Value
Electrical resistivity	-100.0 °C	1.3E-7 Ω·m
	20.0 °C	1.95E-7 Ω·m
	100.0 °C	2.4E-7 Ω·m
	200.0 °C	3.15E-7 Ω·m
	300.0 °C	4E-7 Ω·m
	400.0 °C	5.03E-7 Ω·m
	500.0 °C	6.26E-7 Ω·m
	600.0 °C	7.68E-7 Ω·m

Magnetic

Property	Value	Comment
Curie temperature	770 °C	Typical for Low Carbon Steel

Chemical properties

Property	Value
Aluminium	0.02 %
Carbon	0.18 %
Chromium	0.3 %
Copper	0.2 %
Manganese	0.6 - 1.4 %
Molybdenum	0.08 %
Nickel	0.3 %
Niobium	0.03 %
Nitrogen	0.02 %
Phosphorus	0.03 %
Silicon	0.4 %
Sulfur	0.025 %
Vanadium	0.05 %

EN 10217-3 Grade TStE 255 – Normalized / Normalized Formed Steel Tubes for Pressure Vessels EN 10217-3: Grade TStE 355 – Normalized or Normalized Formed Steel Tubes for High-Pressure Applications

Metal