Special steel grades of the PT-series


The special steel grades of the PT series (PT: ‘Peiner Träger’, i. e. Peine beam) meet extraordinarily high requirements with minimum yield strength values from 355 to 460 N/mm2.

They are successfully used not only in offshore technology, but in general in all fields of steel structures, bridge, vehicle, crane, and reactor construction and in shipbuilding.

Their excellent chemical, mechanical and technological properties are listed in these tables

  • Chemical composition of PT steels
  • Mechanical and technological properties of PT steels

Carbon equivalent value and weldability
The high-strength PT series steel grades offer excellent weldability due to their extremely low carbon equivalent value (CEV). They may be welded without preheating for the most part. We guarantee a maximum carbon equivalent value of:

0,39 % for PT 355
0,42 % for PT 420
0,43 % for PT 460

Resistance to brittle fracture 
The PT series steel grades offer high resistance against brittle fracture due to their excellent toughness properties, even at low temperatures.

Properties in the product's throughthickness direction
To meet the highest standards, PT series steel grades are also offered with guaranteed properties in through-thickness direction upon request. This eliminates the risk of lamellar tearing. 

Delivery conditions
Sections made from PT series steel grades can be produced in the delivery conditions ‘Normalising rolled’ and ‘Thermomecanically rolled’, upon request. In addition to this, a heat treatment furnace is available for normalising operations. 

Galvanising properties
Superb galvanising properties of all steel grades for Peine beams are obtained by a Si-content of 0,15 to 0,25 %

Chemical composition of PT steels in %

(Heat analysis 1))


A = Steel grade
B = Cmax 2)
C = Si
D = Mnmax
E = Pmax
F = Smax
G = Nbmax
H = Vmax
I = Timax
J = CEVmax 3)

A  B  C  D  E  F  G  H  I  J 
PT 355 0,12 0,15 - 0,25 1,60 0,025 0,025 0,04 0,06 0,030 0,39
PT 355 E 0,12 0,15 - 0,25 1,60 0,025 0,020 0,04 0,06 0,020 0,39
PT 355 EM 0,12 0,15 - 0,25 1,60 0,025 0,015 0,04 0,06 0,020 0,39
PT 355 EMZ 0,12 0,15 - 0,25 1,60 0,020 0,007 0,04 0,06 0,020 0,39
PT 420 0,12 0,15 - 0,25 1,65 0,025 0,020 0,04 0,08 0,030 0,42
PT 420 EMZ 0,12 0,15 - 0,25 1,65 0,020 0,007 0,04 0,08 0,020 0,42
PT 460 0,12 0,15 - 0,25 1,70 0,025 0,020 0,04 0,12 0,030 0,43
PT 460 EMZ 0,12 0,15 - 0,25 1,70 0,020 0,007 0,04 0,12 0,020 4) 0,43

1) The provisions of EN 10025, EN 10113, EN 10225, etc. shall apply to the admissible variations of heat analysis from the check analysis.
2) A carbon content of up to 0.18 % and a correspondingly higher CEV is permissible for product thicknesses > 40 mm
3) CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15
4) Lower V-content by agreement

Mechanical and technological properties of PT steels

A = Steel grade
B = Yield strength <= 16 mm
C = Yield strength > 16 mm <= 40 mm
D = Tensile strength Rm [N/mm²]
E = Elongation at rupture A5 [%], min.
F = Reduction of area in through-thickness direction Z[%], min. 1) 2)
G = Noth impact energy Av[J], min. 1) long
H = Noth impact energy Av[J], min. 1) transv.
I = Test temperature [°C]

A  B  C  D  E  F  G  H  I 
PT 355 355 345 490 - 630 23 - 27 - -20
PT 355 E 355 345 490 - 630 23 - 50 - -20
PT 355 EM 355 345 490 - 630 23 - 60 3) -20
PT 355 EMZ 5) 355 345 490 - 630 23 35 70 3) -40 4)
PT 420 420 410 520 - 680 20 - 40 - -20
PT 420 EMZ 5) 420 410 520 - 680 20 35 60 3) -40 4)
PT 460 460 440 550 - 720 17 - 40 - -20
PT 460 EMZ 5) 460 440 550 - 720 17 35 60 3) -40 4)

1) Average value of three samples
2) Tests only by agreement
3) Tests and values by agreement
4) -20 °C for t <= 25 mm
5) Higher requirements by agreement
6) Values for greater product thicknesses must be taken from the appropriate sets of rules.
Sitemap Sitemap Impressum Data protection Impressum Imprint Impressum RecommendPrint Print Manager Login