EN 10025-3 Grade S420N normalized or normalized formed (+N)

EN 10025-3 Grade S420N normalized or normalized formed (+N)

EN 10025-3 Grade S420N is a normalized/normalized rolled weldable fine grain structural steel. It belongs to the EN 10025 standard, which specifies technical delivery conditions for structural steels with improved atmospheric corrosion resistance.


S420N steel is primarily used in construction and engineering projects that require high strength and good toughness. It offers excellent weldability, formability, and impact resistance, making it suitable for various applications such as buildings, bridges, and machinery.

According to the EN 10025-3 standard, S420N has specific requirements for chemical composition and mechanical properties. The chemical composition includes elements such as carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), and other alloying elements. These elements are controlled within specified limits to ensure the desired properties of the steel.

In terms of mechanical properties, S420N must meet criteria for yield strength, tensile strength, elongation, and impact energy absorption. These properties determine the material's ability to withstand loads and provide structural integrity.

EN 10025-3 Grade S420N is a normalized/normalized rolled structural steel that offers good weldability, high strength, and improved atmospheric corrosion resistance. It is commonly used in construction projects requiring reliable and durable structural components.

EN 10025-3 Grade S420N can be supplied in two different conditions: normalized or normalized formed (+N).

Normalized: This condition refers to the steel being subjected to a controlled heating and cooling process to achieve uniform properties throughout the material. It involves heating the steel above its critical temperature, holding it at that temperature for a specific time, and then allowing it to cool in still air. Normalizing improves the mechanical properties of the steel, such as strength and toughness.

Normalized formed (+N): This condition indicates that the steel has undergone a forming process after normalization. The forming process could involve shaping, bending, or any other method of altering the steel's shape. After the forming process, the steel is again subjected to normalization to restore its desired properties.

EN 10025-3 Grade S420N can be supplied either in a normalized condition or in a normalized formed (+N) condition, depending on the specific requirements of the application.


The alloyed, normalised/normalising rolled high grade steel S420N is a weldable fine-grained steel with a min. yield point of 420 N/mm². The steel is applicated in normalized condition for several types of welded constructions such as fixed and movable storage container, high-pressure pipes, bridge and load-bearing constructions etc. 
Cold forming: Suitability for cold bending, folding, cold flanging or cold welting has to be agreed. For sheet, strip and wide flat steel in normalized condition, for nominal thickness (s) up to 16 mm can be warranted the following bending radius values:
longitudinal: 5 x s
transverse: 4 x s
Sheet and strip of nominal thicknesses


Property Temperature Value Condition Related Standards Shape
Density 20 °C
7.84 g/cm³
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar


Property Temperature Value Condition Related Standards Shape Comment
Elastic modulus -100 °C
217 GPa
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
20 °C
212 GPa
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
100 °C
207 GPa
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
200 °C
199 GPa
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
300 °C
192 GPa
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
400 °C
184 GPa
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
500 °C
175 GPa
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
600 °C
164 GPa
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Elongation
16.4 %
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Predicted Value, A80 Transverse
16.6 %
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Predicted Value, A80
17 %
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Predicted Value, A200
18.8 %
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Predicted Value, Transverse
20.9 %
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Predicted Value, A50
21.1 %
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Predicted Value, A5
20 °C
17 %
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Flat
20 °C
18 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire
20 °C
19 %
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat, Rod, Wire
Hardness, Brinell
247 [-]
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Predicted Value, Transverse
Poisson's ratio
0.29 [-]
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Typical for Low Carbon Steel
Reduction of area
44.1 %
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Predicted Value, Transverse
50.8 %
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Predicted Value
Shear modulus
82 GPa
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Typical for Low Carbon Steel
Shear strength
510.8 MPa
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Predicted Value
Tensile strength 20 °C
480 - 640 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Flat
20 °C
500 - 680 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat, Rod, Wire
20 °C
500 - 650 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat, Rod, Wire
20 °C
520 - 680 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat, Rod, Wire
20 °C
520 - 650 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat, Rod, Wire
Yield strength
257.3 MPa
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Predicted Value, RP1
301.6 MPa
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Predicted Value, RP1 Transverse
397.1 MPa
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Predicted Value, Transverse
413.2 MPa
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Predicted Value, RP02
456.3 MPa
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Predicted Value, RP02 Transverse
480.4 MPa
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Predicted Value, RP002
499.9 MPa
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Predicted Value, RP05
20 °C
320 MPa
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire
20 °C
330 MPa
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire
20 °C
335 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Flat
20 °C
340 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat, Rod, Wire
20 °C
360 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat, Rod, Wire
20 °C
370 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat, Rod, Wire
20 °C
390 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat, Rod, Wire
20 °C
400 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat, Rod, Wire
20 °C
420 MPa
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat, Rod, Wire


Property Temperature Value Condition Related Standards Shape Comment
Coefficient of thermal expansion -100 °C
1.05e-05 1/K
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
20 °C
1.15e-05 1/K
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
100 °C
1.21e-05 1/K
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
200 °C
1.27e-05 1/K
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
300 °C
1.32e-05 1/K
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
400 °C
1.36e-05 1/K
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
500 °C
1.4e-05 1/K
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
600 °C
1.44e-05 1/K
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Max service temperature
218.6 °C
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Predicted Value, Long
500 °C
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Typical for Carbon Steel
Melting point
1480 - 1526 °C
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Typical for Low Carbon Steel
Specific heat capacity -100 °C
423 J/(kg·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
20 °C
461 J/(kg·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
100 °C
479 J/(kg·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
200 °C
499 J/(kg·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
300 °C
517 J/(kg·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
400 °C
536 J/(kg·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
500 °C
558 J/(kg·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
600 °C
587 J/(kg·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Thermal conductivity -100 °C
35.4 W/(m·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
20 °C
40.4 W/(m·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
100 °C
42 W/(m·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
200 °C
42 W/(m·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
300 °C
40.8 W/(m·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
400 °C
38.9 W/(m·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
500 °C
36.6 W/(m·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
600 °C
34.3 W/(m·K)
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Thermal diffusivity -100 °C
12.1 mm²/s
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
20 °C
11.2 mm²/s
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
100 °C
10.8 mm²/s
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
200 °C
10.1 mm²/s
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
300 °C
9.3 mm²/s
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
400 °C
8.3 mm²/s
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
500 °C
7 mm²/s
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
600 °C
5.8 mm²/s
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar


Property Temperature Value Condition Related Standards Shape Comment
Electrical conductivity
5 S/m
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Predicted Value
Electrical resistivity -100 °C
1.93e-07 Ω·m
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
20 °C
2.58e-07 Ω·m
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
100 °C
3.05e-07 Ω·m
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
200 °C
3.76e-07 Ω·m
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
300 °C
4.6e-07 Ω·m
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
400 °C
5.59e-07 Ω·m
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
500 °C
6.75e-07 Ω·m
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
600 °C
8.08e-07 Ω·m
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar


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


Property Value Condition Related Standards Shape
Aluminium
0.02 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Carbon
0.2 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Chromium
0.3 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Copper
0.55 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire
0.7 %
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat
Manganese
1 - 1.7 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Molybdenum
0.1 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Nickel
0.8 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Niobium
0.05 %
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat
0.2 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire
Nitrogen
0.025 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Phosphorus
0.03 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire
0.035 %
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat
Silicon
0.6 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire, Bar
Sulfur
0.025 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire
0.03 %
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat
Titanium
0.03 %
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat
0.05 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire
Vanadium
0.05 %
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normalized or normalized formed (+N) EN 10025-3, EN 10113-2 Strip, Sheet, Flat, Rod, Wire
0.2 %
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normalized or normalized formed (+N) EN 10113-2, EN 10025-3 Sheet, Strip, Bar, Flat


Property
Supplier Disclaimer The given information is a rough description and some properties can depend on various factors such as product thickness. Please contact the supplier or refer to the related norm or standard for further information.

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