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Key Steel

Key steel stockholders and suppliers. Key Steel is a bright drawn steel supplied in square and rectangular bar with delivery to the whole of the UK. It is an unalloyed medium carbon steel with reasonable tensile strength. It is supplied bright drawn in flat and square sections conforming to the specification requirements of BS46 and BS4235.

Imperial sizes of key steel bar are bright drawn to plus tolerances conforming to BS46 “keys and keyways”. Metric sizes of key steel bar are bright drawn to minus tolerances conforming to BS4235 “parallel and taper keys”.

Key steel is held on stock and can be delivered throughout the UK.  All orders are supplied in accordance with our ISO 9001 accreditation.

Alternative carbon steel grades we supply:  EN3 | EN8 | EN9 | EN32 |  EN43 | 070M20 | 080M40 | 070M55 | 080A15 | S275 | S355 | C45

Form of Supply

As key steel suppliers West Yorkshire Steel offer rectangular and square bar in 1 metre and 3 metre lengths. Key Steel is a bright drawn carbon steel available in standard metric and imperial sizes (listed at bottom of this page).

Click here to contact our experienced sales team who will assist you with your key steel enquiry.

  • Flat

Click on the headings below for further info

Applications

Key Steel is widely used for many general engineering applications. Typical key steel applications include taper, gibhead, plain and parallel keys.

Carbon 0.35-0.45% Phosphorous 0.06% max
Manganese 0.60-1.00% Sulphur 0.06% max
Silicon 0.05-0.35%

As a bright drawn steel bar it is uncommon to harden key steel. In its supply condition key steel has an approximate tensile strength of 500 to 700N/mm2.

If heat treatment is a requirement, key steel can be heat treated by conventional methods and flame or induction hardening. Please consult your heat treatment provider for full guidance on heat treatment of key steel.

Imperial Squares
Up to and including 7/8” -0/+0.002”
Over 7/8” Up to and inc. 1 ¼” -0/+0.003”
Over 1 ¼” -0/+0.004″
Imperial Flats
Up to and inc. ¾” x ½” Width -0/+0.002”   Thickness -0/+0.003”
⅞” x ⅝” Width -0/+0.002”   Thickness -0/+0.004”
Over ⅞” x ⅝”” up to and inc. 1¼” x ⅞” Width -0/+0.003”   Thickness -0/+0.004”
Over 1¼” x ⅞” up to and inc.1¾” x 1¼” Width -0/+0.004”   Thickness -0/+0.006”
2″ x 1 1/4″ Width -0/+0.005”   Thickness -0/+0.006”
Metric Squares (mm)
Up to and inc. 6 +0mm/-0.030mm
Over 6 and up to and inc. 12 +0mm/-0.036mm
over 16 +0mm/-0.043mm~
Metric Flats
8 x 7 up to and inc. 10 x 8 Width +0/-0.036mm   Thickness +0/-0.090mm
Over 10 x 8 up to and inc. 16 x 10 Width +0/-0.043mm   Thickness +0/-0.090mm
18 x 11 Width +0/-0.043mm   Thickness +0/-0.110mm
Over 18 x 11 up to and inc. 28 x 16 Width +0/-0.052mm   Thickness +0/-0.110mm
32 x 18 Width +0/-0.062mm   Thickness +0/-0.110mm
Over 32 x 18 up to and inc. 50 x 28 Width +0/-0.062mm   Thickness +0/-0.130mm

Imperial Sizes Metric Sizes
3/16″ sq 5/8″ sq 4mm sq 16mm x 28mm
3/16″ x 1/4″ 5/8″ x 3/4″ 5mm sq 18mm x 32mm
1/4″ x 5/16″ 5/8″ x 7/8″ 6mm sq 20mm sq
1/4″ sq 5/8″ x 1″ 6mm x 10mm 20mm x 25mm
1/4″ x 3/8″ 3/4″ sq 7mm x 8mm 20mm x 36mm
1/4″ x 1/2″ 3/4″ x 7/8″ 8mm sq 22mm sq
1/4″ x 5/8″ 3/4″ x 1″ 16mm x 20mm 22mm x 40mm
5/16″ sq 3/4″ x 1 1/4″ 8mm x 12mm 24mm sq
5/16″ x 3/8″ 7/8″ sq 9mm x 14mm 25mm sq
5/16″ x 7/16″ 7/8″ x 1″ 10mm sq 25mm x 40mm
5/16″ x 1/2″ 7/8″ x 1 1/2″ 10mm x 12mm 25mm x 45mm
3/8″ sq 1″ sq 10mm x 16mm 28mm sq
3/8″ x 7/16″ 1″ x 1 1/4″ 11mm x 18mm 28mm x 50mm
3/8″ x 1/2″ 1″ x 1 1/2″ 12mm sq 30mm sq
3/8″ x 5/8″ 1″ x 1 5/8″ 12mm x 20mm 32mm x 56mm
9/16″ sq 1 1/8″ sq 14mm sq 32mm sq
7/16″ sq 1 1/4″ sq 14mm x 22mm 36mm sq
7/16″ x 5/8″ 1 1/4″ x 1 3/4″ 14mm x 25mm 38mm sq
1/2″ sq 1 1/4″ x 2″ 15mm sq 40mm sq
1/2″ x 5/8″ 1 1/2″ sq 16mm sq 45mm sq
1/2″ x 3/4″ 1 1/2″ x 2″ 8mm x 10mm 50mm sq
1/2″ x 1″ 1 3/4″ sq
3/8″ x 3/4″ 1 3/4″ x 2″
2″ sq

We recommend you contact your welding consumables supplier who should provide you full assistance and information on welding key steel.

Key Steel is available with a certificate of conformity, if required please request when placing any orders.

Key Steel bar is supplied in accordance with our ISO 9001:2015 registration.

  • West Yorkshire Steel has been selling Key Steel for over 50 years and has established itself as one of the UK’s leading suppliers of Carbon Steel.
  • Large stock range.
  • Reliable on time delivery throughout the UK, all items packaged safe and secure.
  • Knowledgeable team with decades of experience – our sales team are responsive and reliable.
  • Trusted by thousands of engineers and tool makers – 5 star Google reviews
  • Long-standing customer relationships – reliable supplier to customers old and new.
  • Trusted for quality, we are an ISO 9001 certified steel supplier.

Our Steel Range

What Our Customers Say

 
 
 
 
 
 
 
  
 
 
 
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 Paul Wragg 
 
 
 
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Great service from order to delivery. A pleasure to deal with.
  
 
  
 
 
 
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 Mark Amiss 
 
 
 
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I've found West Yorshire Steel to be very helpful, when in the need of specialist material.
  
 
  
 
 
 
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 Ian Hutchings (Hutch) 
 
 
 
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Only company we could find that could supply the special steel we were looking for at a good price and quick delivery.  A pleasure to deal with.
  
 
  
 
 
 
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 jason Platten 
 
 
 
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Always receive pricing in good time and deliveries always meet our deadlines.
  
 
  
 
 
 
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 Graeme Glover 
 
 
 
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I am most impressed with the service that I received from West Yorkshire Steel. They supplied me with an unobtainable type of Steel in Australia and had it shipped half way across the world to me. I sourced this steel for an old mate of mine so that he could make engine bearings for his Classic French Sports car, he is 96 years young and WYS made him very happy. I would have no hesitation in recommending your Company in the future. Cheers Graeme Glover
  
 
  
 
 
 
 Posted on Google Google 
  
 
 Chaz Jones 
 
 
 
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Helpful service and fast delivery for small diameter Imperial sized EN16T. Thanks!
  
 
  
 
 
 
 Posted on Google Google 
  
 
 Steve White 
 
 
 
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Great company to deal with, friendly, super efficient, good price, and it was even delivered early! We buy a lot of small quantities of odd materials and will definitely be using them again. Thank you

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