Steel Division

Apparatus engineering


Heads and cones

We are the only provider worldwide of shell plates, heads and cones from a single source in carbon steel and as clad products.

Successful throughout the world

Our dished heads are found in applications such as heat exchangers, separators, columns, compressors, storage containers and tank cars. Our customers are found in the petrochemistry, oil and gas, paper and pulp, energy and railcar manufacturing industries. We are the world's only single-source supplier to deliver shell plates, heads and cones made of carbon steel in clad design.

Our materials

We use structural steels, fine-grained structural steels and pressure-vessel steels for carbon-steel heads and pressed parts.

We manufacture clad heads and pressed parts from all conventional carbon steels. We supply stainless and heat-resistant steel grades and non-ferrous metals and alloys as cladding materials for optimum corrosion resistance.

Headmolds and dimensions

We manufacture custom-made heads as a single part or welded from multiple parts. Multi-part cones are available in head gauges of up to 160 mm and diameters of up to 10,000 mm.




Dished and flanged

Single-part heads


3,400 mm max.

3,400 mm max.



160 mm max.

65 mm max.





3,400–3,700 mm

3,400–6,500 mm



160 mm max.

65 mm max.

Multi-part heads

and cones


10,000 mm max.



160 mm max.


Clad heads

and cones


10,000 mm max.



120 mm max.

Please find more detailed information on materials, head shapes and dimensions in the downloadable product information folder.


Pressure vessel plates

Our pressure-vessel steels are suitable for very high or very low temperatures and are characterized by special strength and wall thickness. We also supply them in sour-gas-resistant design upon request.

Optimized workability

Roll-bonded shell plates, heads and cones in plain-carbon steel from a single source means optimum processing for our customers. The base materials are ideally matched during production. The large range of steel grades cover a wide spectrum of application possibilities.

Boiler construction and apparatus engineering

Pressure-vessel steels made by voestalpine Grobblech GmbH are found in the equipment and boilers in the chemical and petrochemical industries. Creep-resistant pressure-vessel steels withstand even the highest temperatures in these areas of application. They are especially suited to use in hot-application pressure vessels

High-strength alloys

We supply high-strength CrMo- und CrMoV steels for the reduction of wall thicknesses in thick-walled pressure vessels. Our customers use the high-strength P460 NL2 mod grade for plates and heads in LPG tank trucks. Cryogenic 9%nickel steels with toughness down to minus 196 °C are used in the construction of storage tanks for liquefied natural (LNG) gas. We also supply heat-treatable fitting steels (WPHY) in as-rolled condition.

Greater thickness and sour-gas-resistant

We provide heavy shell plates in selected steel grades, in thicknesses up to 200 mm and higher unit weights up to 24 tons based on ingot-cast pre-material. We also manufacture pressure vessel steels in sour-gas-resistant design for our customers.

From a single source 

 We supply from a single source shell plates, heads and cones made of both plain carbon steel and roll-clad design. This results in the following advantages for our customers:     

  • Manufacturing and processing benefits, primarily in the field of welding, through use of the same steel for shell plates and heads     
  • Technical consultation and coordination through quality assurance and research     
  • Simultaneous manufacturing and delivery of shell plates and heads     
  • Lower customer costs

Steel grades

Steel group

Standard grades

Steel grades

Un-alloyed and


creep-resistant steels

EN 10028-2:

P235, 265, 295, 355GH

16Mo3, 20MnMoNi4-5

13CrMo4-5, 10CrMo9-10


Fine-grain structural steels


pressure vessel construction

EN 10028-3:

P275 NH, NL1, NL2

P355 NH, NL1, NL2

P460 NH, NL1, NL2


cryogenic steels

EN 10028-4:





Pressure-vessel steels


(S)A 203 Grade D, E

(S)A 387 Grade 11 Class 2

(S)A 387 Grade 12 Class 2

(S)A 387 Grade 22 Class 2

(S)A 516 Grade 60, 65, 70 

(S)A 537 Class 1, 2

(S)A 533 Type B Class 2

(S)A 738 Grade A, B

Die Stahlsorten (S)A 516 Grade 50, 65 and 70 nach ASTM/ASME sind auf Anfrage auch sauergasbeständig lieferbar.



Plate thickness:

5–150 mm (dependent on thickness and steel grade)

Plate width:

3,950 mm max. (dependent on thickness and steel grade; quenched and tempered up to 3,800 mm max.)

Plate length:

18,700 mm max. (dependent on thickness and steel grade; quenched and tempered up to 13,200 mm max.)

Ordered weight:   

At least 2 tons per line item (dependent on thickness and steel grade)

Unit weight:

11.7 tons max. per single plate


Heavy shell plates made of ingot-cast pre-material

We supply heavy boiler plates in selected steel grades, in thicknesses up to 200 mm and unit weights up to 24 tons based on ingot-cast pre-material.

Steel grades: 

(S)A 516 Gr 60, 65, 70

(S)A 387 Gr 11 Cl.2

(S)A 387 Gr 12 Cl.2

(S)A 387 Gr 22 Cl.2

(S)A 537 Cl.1, 2

(S)A 542 Type D Cl.4a

(S)A 533 Type B Cl.2 (other steel grades upon request)

Plate thickness:   

70–200 mm

Plate width:

3,400 mm max. (dependent on thickness and steel grade)

Plate length:

13,200 mm max. for quenched and tempered plates (9,000 mm max. for thicknesses 150–200 mm)

Unit weight:    

24 tons max. per single plate


Nickel plates

We supply high-quality nickel plates in extra wide and thin dimensions for the storage and transport of LNG and LPG.


Natural gas is liquefied at the extremely low temperature of -164 °C, shrinking its volume by a factor of 600. This makes its storage and transport possible and economically efficient. At these very low temperatures, the utilization of special 9 % nickel steels is necessary in order to guarantee sufficient toughness and resistance to brittle cracking. We supply extra wide plates to this market segment, even with a thickness of 5 mm.


The LPG process is used to produce propane and process gases from natural gas. These gases are liquefied at room temperature at low pressure and are stored in special tanks made of 5 % nickel steels. We supply shell plates and vessel heads from a single source.

Highest quality for the highest degree of safety

The basis of our high-quality nickel plates are high-purity slabs from our own steelmaking plant. The very low carbon content guarantees perfect weldability. Further advantages are found in the product's excellent impact strength and the fracture-mechanical properties (CTOD). The entire plate surface undergoes ultrasonic testing. The residual magnetism is below 50 gauss.

Preprocessing to meet specific customer requirements

  • Shot-blasted or shot-blasted and primed
  • Weld edge preparation: Minimal hardening of the flame-cut edge is a result of the low carbon content.
  • Plate bending

Steel grades

Steel group


Steel grades

5 % nickel steels

EN 10028-4:2003


9 % nickel steels

EN 10028-4:2003



A/SA 553 Type 1



Plate thickness

5 % nickel steels: 5–70 mm

9 % nickel steels: 5–60 mm

Plate width

1,600–3,800 mm, extra wide plates: 9 % nickel steels with a thickness of 5 mm are available in widths up to 2,800 mm.

Plate length

12,400 mm max.

Ordered weight  

At least 2 tons per line item

Unit weight

10.0 tons max. per single plate



Our product quality is certified by all of the leading certification institutions. We also meet the highest requirements of KOGAS, the state-operated Korean gas company.

Certifications for 5 % nickel steels

  • Lloyd's Register of Shipping (LRS), Great Britain
  • Technischer Überwachungsverein (TÜV), Germany
  • Germanischer Lloyd (GL), Germany
  • Registro Italiano Navale (RINA), Italy
  • Lloyd's Register of Shipping (LRS), Great Britain
  • Bureau Veritas (BV), France

Certifications for 9 % nickel steels

  • Lloyd's Register of Shipping (LRS), Great Britain
  • Technischer Überwachungsverein (TÜV), Germany

Plattierter Behälter

Clad plates

Roll-bonded clad plates are the economic alternative to expensive high-alloy and non-clad plates. The mechanical properties of the base material are optimally combined with the corrosion resistance of the cladding material.

Our roll-bonded clad plates and heads are found in chemical equipment applications and refineries, in the oil and gas industry, coke drums and the food industry. Clad plates are also used in seawater desalination and flue gas desulfurization plants.


Clad plates consist of a base and a cladding material.

The base materials for our clad plates are produced exclusively in our own steelmaking plant in Linz. Cladding materials are purchased in the form of slabs and sheets from renowned manufacturers.

The base materials are predominantly made of structural steels, steels for boilers and pressure vessels and fine-grained structural steels, all of which are characterized by good weldability and formability.

Cladding materials are made of ferritic and austenitic stainless steels, nickel and nickel-based alloys, copper and copper-nickel alloys, all of which have excellent anti-corrosive properties.

Further material details are contained in the brochure that you can open below.

The base material surfaces are generally delivered in as-rolled or shot-blasted condition.

In almost all instances, the surface of the cladding material is polished. Our standard polish is 80 grain. Other grain sizes are available upon request.

Here you will find more information about delivery conditions and certifications for clad plates.

Available dimensions

Cladding material 

Ferritic and austenitic stainless steel

Copper, nickel alloys

Total thickness

6–150 mm

6–65 mm

Cladding thickness

1.5–10 mm

1.5–10 mm


3,800 mm max.

3,800 mm max.


15,000 max. (12,400 mm Q+T max.)

15,000 max.

(12,400 mm Q+T max.)

Unit weight

2–18 tons

2–9 tons

Surface area

6 m² min.

6 m² min.



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