Ovarock â€“ Steels for Mining and Rock Drilling Applications from

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


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


- 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


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



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)


- Hardenability corresponding to a bar dia. of 60 mm ( quenched in oil) - Delivered as rolled, annealed, normalized or Q&T X X X X



X X

Ovako 498 30 NCD 15 (FR), 30NiCRMo16-6 (DIN), AHT 28


- 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


Steel type Properties



Ovako 327 42CrMo4, A 193 (B7), A320 (L7)


- Hardenability corresponding to a bar dia. of 60 mm ( quenched in oil) - Delivered as rolled, annealed, normalized or Q&T



EN25Cr-SiMo7-4


- 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


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)


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


Extra dimensions that can gear up your production


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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Ovarock â€“ Steels for Mining and Rock Drilling Applications from

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