Post on 12-Sep-2021
Ovarock – Steels for Mining and Rock Drilling Applications from Ovako
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Steels that match strength with strength
At Ovako we have a long tradition as a steel supplier to the mining and rock
drilling industry and througout the years we have gained comprehensive application
know-how in this field. Today we are a global actor supplying steels to all the leading
producers and for the most demanding applications.
Over the years we have refined the standard products and developed new front-edge
products to meet our customers’ intensified requirements.
With our wide range of steel grades and products, marketed under the name
Ovarock, it goes without saying that we can offer the optimal steel for each applica-
tion. Clean steels with excellent strength and fatigue properties as well as high tensile
strength and wear resistance are typical characteristics of the steels we manufacture.
In combination with our wide range of products, including hot rolled bars in
different shapes, cold worked bars, hard chrome plated bars, and seamless hot rolled
and cold worked tubes, we can offer a strong package for the manufacture of
top hammer and down the hole tools, drill rigs, demolition equipment, mining
support equipment and screens as well as grinding media.
Of course, with this metallurgical and production know-how we can also be your
partner when discussing new ideas. We speak the designers’ language.
In the Mining and Construction Industry our steels are used in many application areas
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Steels that match strength with strength
In the Mining and Construction Industry our steels are used in many application areas
Demolition equipment
Top hammer drills
Down the hole equipment
Drill rigs and hammersGrinding media
Screens
Our steels for Mining and Construction applications are used when extra performance
is demanded. Steels that can withstand extra strain, typically for top hammer and
DTH-tools, demolition equipment as well as for drill rigs, mining support equipment,
screens and minerals grinding. This is the reason our steels frequently have that little
extra something, whether it is fatigue strength or wear resistance.
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A broad range of executions and a broad range of dimensions!
More power in Mining and Rock drilling
Ovako can offer a broad assortment of steel
grades to be used for the manufacture of most
products that are produced within the Mining and
Construction Industry. Below you can see the
characteristics for each steel grade that can be
used for producing different mining and rock
drilling applications.
GradeComparable standard grade
Steel type PropertiesTop hammer Piston
Shank adaptors
Drill rodCoupling sleeve
Tubular drill rod
Drill bits
Ovako 253 Case hardening steel also suitable for Q&T
- High hardenability - Excellent toughness - High wear resistance- Good dimensional stability- Delivered as rolled or normalized
X X X X
Ovako 256 Case hardening steel also suitable for Q&T
- High hardenability - Excellent toughness - High wear resistance - Good dimensional stability - Delivered as rolled or normalized
X X
Ovako 420 24CrMo 13-6, 722 M 24 (GB)
Quench and tempering steel suitable for nitriding
- Good toughness - Good dimensional stability - Through hardenability corresponding to a bar approx. 130 mm - Delivered as rolled, soft annealed or Q&T
X
Ovako 495 ASTM A579 (23) Quench and tempering steel
- Good toughness - High wear resistance - Good dimensional stability - Good fatigue strength - High strength steel - Through hardenability corresponding to a bar approx. dia. 100 mm - Delivered as rolled, soft annealed or Q&T
X X
Ovako 498 30 NCD 15 (FR), 30NiCRMo16-6 (DIN), AHT 28
Quench and tempering steel
- High hardenability - Excellent toughness - High wear resistance - Good dimensional stability - Delivered as rolled or normalized or Q&T
Ovako 528 En 50CrMo4 Quench and tempering steel
- Good toughness - High wear resistance - Good fatigue strength - High strength steel - Through hardenability corresponding to a bar approx. 75 mm - Delivered as rolled, soft annealed, normalized or Q&T
X
GradeComparable standard grade
Steel type PropertiesAdaptor Sub (RC Drilling)
End Piece
Top Sub
PistonPiston Case
Driver Sub
Drill bits
Ovako 146 16NiCrS4 Case hardening steel
- Good toughness - Controlled hardenability - Good machinability - Delivered as rolled, annealed or normalized
X
Ovako 256 Case hardening steel also suitable for Q&T
- High hardenability - Excellent toughness - High wear resistance - Good dimensional stability - Delivered as rolled or normalized
X
Ovako 277 Air hardening steel suitable for both case harde-ning, nitriding or Q&T
- Exceptionally high hardenability, corresponding to a bar dia. of 200 mm ( quenched in oil). - Excellent toughness - Good welding properties- Excellent fatigue resistance - Delivered as hot rolled annealed
X X X X
Ovako 327 42CrMo4, A 193 (B7), A320 (L7)
Quench and tempering steel
- Hardenability corresponding to a bar dia. of 60 mm ( quenched in oil) - Delivered as rolled, annealed, normalized or Q&T X X X X
Ovako 495 ASTM A579 (23) Quench and tempering steel
- Good toughness - High wear resistance - Good dimensional stability - Good fatigue strength - High strength steel - Through hardenability corresponding to a bar approx. dia. 100 mm - Delivered as rolled, soft annealed or Q&T
X X
Ovako 498 30 NCD 15 (FR), 30NiCRMo16-6 (DIN), AHT 28
Quench and tempering steel
- High hardenability - Excellent toughness - High wear resistance - Good dimensional stability - Delivered as rolled or normalized or Q&T
X
Ovako 528 En 50CrMo4 Quench and tempering steel
- Good toughness - High wear resistance - Good fatigue strength - High strength steel - Through hardenability corresponding to a bar approx. 75 mm- Delivered as rolled, soft annealed, normalized or Q&T
X X
GradeComparable standard grade
Steel type Properties
Ovako 256 Case hardening steel also suitable for Q&T
- High hardenability - Excellent toughness - High wear resistance - Good dimensional stability - Delivered as rolled or normalized
Ovako 327 42CrMo4, A 193 (B7), A320 (L7)
Quench and tempering steel
- Hardenability corresponding to a bar dia. of 60 mm ( quenched in oil) - Delivered as rolled, annealed, normalized or Q&T
Ovako 495 ASTM A579 (23) Quench and tempering steel
- Good toughness - High wear resistance - Good dimensional stability - Good fatigue strength - High strength steel - Through hardenability corresponding to a bar approx. dia. 100 mm - Delivered as rolled, soft annealed or Q&T
EN25Cr-SiMo7-4
Quench and tempering steel
- High fatigue strength - Good thoughness - Good dimensional stability - Through hardenability corresponding to a bar approx. dia. of 120 mm - Delivered as rolled, soft annealed or Q&T
Demolition tooling
Top hammer
DTHIllustration: Atlas Copco
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Diameter (mm)
A broad range of executions and a broad range of dimensions!
Tubes – hot-rolled and cold-worked or hard chrome plated
Bars – hot-rolled and Bright bars
Grinding media– grinding bars 75-120 mm– ginding balls 20-70 mm
Flat bars – hot rolled
Hard Chrome Plated Bars
More information about our products can be found at www.ovako.com
In the inner orange field the tolerances indicated for hot rolled tubes apply and in the inner blue field the indicated tolerances apply for cold worked tubes. In the outer light orange and blue fields the tube sizes must be applied by the mill.
Ovako has a wide range of high-grade steel products, which means that we
can offer the optimal product for most mining and rock drilling applications.
Our comprehensive programme of dimensions provides a basis for excellent produc-
tion economy through a higher degree of materials exchange and consequently
lowers material and machining costs.
o Cromax® Tube, standard sizes
Diameter (mm)
Width (mm)
Outer diameter (mm)
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Pre-machined componentsOvako has comprehensive resources for manufacturing
pre-components in various stages of machining, from
cut blanks to finished parts that are controlled and ready
for assembly. Our production systems are designed to
meet the customers’ requirements for product optimi-
zation and short lead times. The equipment can be
adapted to both long and short production runs.
• Cutting
• Chamfering
• Drilling
• Milling
• Tumbling
• Planing
• Turning
• Threading
More detailed information on our pre-machined
components is available at www.ovako.com.
Logistics and IT solutionsAt Ovako, logistics have always been a strategic issue
and an integral part of our operations. With our long
experience of supplying steel products to customers
worldwide, we have continuously refined our logistic
solutions by offering shorter lead times, more rational
and cost-effective transport systems, and more
purpose-driven warehousing routines. One of our IT-
based solutions, for example, can under certain condi-
tions be used to give you detailed information relating
to your business activities with us. The system also
makes it possible to present data from different Ovako
units in a uniform way. Our objective has always been
to enable our customers to simplify their material hand-
ling, reduce their capital costs and enjoy better service.
Customer supportMaking steel is only part of the job. Just as important
is the technical co-operation with every individual
customer. Using our comprehensive knowledge and
experience of different applications and production
methods, we can give qualified customer support not
only regarding the properties of our steel, but also on
how to heat-treat and machine it. We can also be a
partner when discussing new ideas on how to get the
most out of our products in production, to achieve high
quality end products as well as the best production
economy. Also at your service is our website, www.
ovako.com, where you can find up-to-date information
on all our standard steel grades, products, and service
offer. You will also find contact details for our sales and
technical support.
Extra dimensions that can gear up your production
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Extra dimensions that can gear up your production
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www.ovako.com
MARKETING:
SEAMLESS TUBES AND RINGSSwedenOvako Steel ABDivision Tube & RingSE-813 82 Hoforsphone +46 (0)290 250 00fax +46 (0)290 250 25
BARSSwedenOvako Steel ABSE-712 80 Hälleforsphone +46 (0)591 600 00fax +46 (0)591 606 06
Ovako Bar ABSE-777 80 Smedjebackenphone +46 (0)240 66 80 00fax +46 (0)240 743 62
Ovako Bar ABSE-590 10 Boxholmphone +46 (0)142 29 36 00fax +46 (0)142 29 37 01
Finland:Ovako Bar Oy AbTerästehtaantie 1FI-55100 Imatraphone +358 (0)5 680 21 fax +358 (0)5 680 22 11
GRINDING MEDIAOvako Forsbacka ABP.O.Box 100SE-818 03 Forsbackaphone +46 (0)26 23 80 00 fax +46 (0)26 23 80 15
Ovako is a leading European producer of long special
steel products for the heavy vehicle, automotive and
engineering industries. Production consists of low alloy
and carbon steels in the form of bare, wire rod, tubes,
rings and pre-components. We have 16 production sites
and several sales companies in Europe and the USA. Our
total steel production amounts to 2 million tonnes.
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