Castings

We produce and trade a wide range of castings in various industries.

We specialize in large-scale, medium-sized or single piece castings of simple and complicated shapes weighing from 0.05 kg to 12000 kg.

Castings are delivered according to the customers requirements - raw, rough or machined – carried out in our machining centre or in cooperation with other companies.

Services

Production of model equipment, technological preparation of production, checking samples Melting plant, Moulding plant, Core plant,Pattern plant

We make model devices from the materials requested by the customer. Maintenance of model equipment owned by the customer is also ensured.

Heat treatment

quenching and tempering, normalizing, stress relief annealing softening, austenitizing annealing, annealing according to the thermal curve

Complete machining of castings

We manage of all conventional casting machining technologies. At customer's request, we perform casting machining – roughing, turning, milling, drilling, grinding. Depending on customer requirements, we also offer co-operation with other machining factories.

Surface treatment of castings

We offer the following operations in the casting production:

Shot blasting, dyeing, varnishing, hot dip galvanizing, priming, phosphating, brightening, anodizing, polishing

Quality Assurance and Casting Testing

Checking the quality of each process by independent control is a matter of course.

  • Check input raw materials
  • Checking model devices
  • Dimensional cast controls including 3D-scanning and 3D-touch measurement
  • Spectral chemical analysis on the device SPECTROMAX
  • Ultrasonic thickness measurement / UTT /
  • Capillary tests / PT /
  • Non-destructive testing (RTG, UZV, magnetic).
  • Metalographic tests
  • Mechanical tests for tensile strength, ductility and hardness, impact strength
  • Spectrometric analysis of chemical composition.
  • Sand laboratory for analysis of formation and core mixtures

Expedition of castings

We provide transportation of castings in packages according to the customer's specification, we use wooden boxes or plastic pallets, gitterboxes, including the required accompanying documentation. We ship the goods according to Incoterms 2017 (FCA, DAP or EXW .)

Casting material

identification of cast iron (ČSN EN 1561) equivalent material
according tensile strength according hardness Czech Republic Germany USA
grade number grade number ČSN DIN 1691 ASTM A48
EN-GJL-150 EN-JL1020
5.1200
EN-GJL-HB175 EN-JL2020
5.1201
42 2415 GG-15 Class 25
EN-GJL-200 EN-JL1030
5.1300
EN-GJL-HB195 EN-JL2030
5.1304
42 2420 GG-20 Class 30
EN-GJL-250 EN-JL1040
5.1301
EN-GJL-HB215 EN-JL2040
5.1305
42 2425 4GG-25 Class 40
EN-GJL-300 EN-JL1050
5.1302
EN-GJL-HB235 EN-JL2050
5.1306
42 2430 GG-30 Class 45, 50
EN-GJL-350 EN-JL1060
5.1303
EN-GJL-HB255 EN-JL2060
5.1307
42 2435 GG-35 Class 55, 60
identification of cast iron (ČSN EN 1563) equivalent material
according tensile strength Czech Republic Germany USA
grade number ČSN DIN 1691 ASTM A48
EN-GJS-400-18LT EN-JS1025
5.3103
42 2314 GGG-40.3 Gr. 60-40-18
EN-GJS-400-18 EN-JS1020
5.3105
42 2314 GGG-40.3 Gr. 60-40-18
EN-GJS-400-15 EN-JS1030
5.3106
42 2304 GGG-40 Gr. 65-45-12
EN-GJS-450-10 EN-JS1040
5.3105
EN-GJS-500-7 EN-JS1050
5.3200
42 2305 GGG-50 Gr. 70-50-05
EN-GJS-600-3 EN-JS1060
5.3201
42 2306 GGG-60 Gr. 80-60-03
EN-GJS-700-2 EN-JS1070
5.3300
42 2307 GGG-70 Gr. 100-70-03
EN-GJS-800-2 EN-JS1080
5.3301
42 2308 GGG-80 Gr. 120-90-02

Carbon steel

norm marking according DIN WNr.
ČSN 42 2640 GS 240 GS-45 1.0446
ČSN 42 2643 GS 240 GS-C25 1.0455
ČSN 42 2650 GE 240 GS-52 1.0552
ČSN 42 2660 GE 300 GS-60 1.0558
ČSN 42 2670 - GS-70 1.0554
GS-45 GE 240 GS-45 1.0446
GS-52 - GS-52 1.0552
GS-60 GE 300 GS-60 1.0558

Low-alloyed steel

norm marking according DIN WNr.
GS-20Mn5 G20Mn5 GS-20Mn5 1.1120
ČSN 42 2709 - GS-20Mn5 1.1120
ČSN 42 2712 - GS-20Mn5 1.1120
ČSN 42 2715 - GS-36Mn5 1.1167
ČSN 42 2719 - - -
ČSN 42 2735 - - -
ČSN 42 2744 - GS17CrMo55 1.7357
ČSN 42 2843 G42CrMo4 GS42CrMo4 1.7231

Stainless steel

norm marking according DIN WNr.
ČSN 42 2906 - GX20Cr14 1.4027
ČSN 42 2911 - GX40CrSi17 1.4740
ČSN 42 2930 - GX6CrNi18 9 1.4308
ČSN 42 2931 - GX10CrNi18 8 1.4312
ČSN 42 2940 - GX6CrNiMo18 10 1.4408
ČSN 42 2941 - GX5CrNiMoNb18 10 1.4581

Heat-resistant steel

norm marking according DIN WNr.
ČSN 42 2913 - GX40CrSi23 1.4745
1.4823 - GX40CrNiSi27 4 1.4823
ČSN 42 2934 - GX40CrNiSi22 9 1.4826
ČSN 42 2936 - GX40CrNiSi25 12 1.4837
ČSN 42 2952 - GX40CrNiSi25 20 1.4848
ADI cast iron Malleable cast iron
EN-GJS-800-10, (5.3400)
EN-GJS-800-10,EN-GJS-800-10
EN-GJMB-300-6, (5.4100)
GTS-30-06, EN-GJMB-300-6
EN-GJS-900-8, (5.3402)
EN-GJS-900-8, EN-GJS-900-8
EN-GJMB-500-5
GTS-50-05, EN-GJMB-500-5
EN-GJMB-550-4
GTS-55-04, EN-GJMB-550-4
EN-GJMB-600-3
GTS-60-03, EN-GJMB-600-3

Cast materials:

  • ALCu4TI
  • AlSi10Mg(b)
  • AlSi7Mg0,3
  • AlSi7Mg0,6
  • AlSi10MgMn
  • AlSi10CuMn
  • AlSi10Mg(Cu)
  • AlSi7Mg(0,3-0,6)
  • AlSi7Mg(Cu)
  • AlSi9Cu3
  • AlSi12
  • AlSi12Mn
  • AlSi12(Cu)
  • AlSi5Cu3
  • AlSi5CuMn
  • AlSi7Cu3
  • AlMg5(Si)

Cast materials:

  • Non-alloy steels
  • Low and medium-alloyed steels
  • Martensitic stainless steels
  • Carburizing steels
  • Heat-treatable steels
  • Austenitic stainless steels
  • Ferritic stainless - Martensitic steels
  • Tool steels
  • Heat resistant steels
  • Cast irons
  • Special alloys

Non-ferrous alloys:

  • AlSi10MgMn
  • AlSi7MgTi
  • CuZn17Si3
  • CuAl10Fe4Ni4
  • CuSn8

We design and produce die forgings and castings of the highest quality materials for world-class companies

Casting methods:

  • gravity casting (steel moulds,sand cores)
  • centrifugal casting
  • pressure casting
  • chill casting
  • low pressure casting
  • high pressure casting
  • precision casting
  • sand casting

We mainly supply to the following industries:

  • Automotive
  • Agriculture
  • Fittings, Pumps
  • Paper and textile machinery
  • Conveyors, handling machines and machinery
  • Metallurgy, Mining
  • Hydraulics
  • Machine tools
  • Railway transport, railway electrification components
  • Polygraphic machines
  • Energy
  • Shipbuilding

Certification

EN ISO 9001:2009

ISO 9002:1994

TÜV SÜD

DNV CERTIFICATE - 2017

Bureau Veritas

Bureau Veritas certificate under BV Mode II for shipbuilding production and deliveries for shipbuilding under the BV Rules

ISO/TS 16949:2009

Kovstar puts great emphasis on maintaining and developing a quality management system to ensure the high quality of all supplied castings.

We build an outstanding Czech reputation of Forging and Foundry industry worldwide.

Contact us,
we will talk
on the details

Přemysl Stárek

business director

+420 739 106 000 premysl.starek@vykovky.cz

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KOVSTAR, s. r. o. Černá cesta 459,
747 57 Slavkov,
Czech Republic
IČ: 60718111 DIČ: CZ60718111