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Key Steel

Key steel stockholders and suppliers, delivering to the whole of the UK. A bright drawn steel in square and rectangular bar, key steel 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”.

 

We welcome export enquiries for key steel. Contact our sales office and consult our shipping policy for further details.


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

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).

Flat

Applications

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


Heat Treatment

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.


Tolerances
Imperial Squares
Up to and including 7/8”
Over 7/8” Up to and inc. 1 ¼”
Over 1 ¼”
 
-0/+0.002”
-0/+0.003”
-0/+0.004"~
Imperial Flats  
Up to and inc. ¾” x ½”
⅞” x ⅝”
Over ⅞” x ⅝”” up to and inc. 1¼” x ⅞”
Over 1¼” x ⅞” up to and inc.1¾” x 1¼"
2" x 1 1/4"
Width -0/+0.002”  Thickness -0/+0.003”
Width -0/+0.002”  Thickness -0/+0.004”
Width -0/+0.003”  Thickness -0/+0.004”
Width -0/+0.004”  Thickness -0/+0.006”
Width -0/+0.005”  Thickness -0/+0.006”

 

Metric Squares (mm)
Up to and inc. 6 
Over 6 and up to and inc. 12    
over 16 
 
+0mm/-0.030mm
+0mm/-0.036mm
+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             
18 x 11
Over 18 x 11 up to and inc. 28 x 16                            
32 x 18            
Over 32 x 18 up to and inc. 50 x 28          
Width +0/-0.043mm  Thickness  +0/-0.090mm
Width +0/-0.043mm  Thickness  +0/-0.110mm
Width +0/-0.052mm  Thickness  +0/-0.110mm
Width +0/-0.062mm  Thickness  +0/-0.110mm
Width +0/-0.062mm  Thickness  +0/-0.130mm

   

Size Range
Imperial Sizes
3/16" sq
3/16" x 1/4"
1/4" x 5/16"
1/4" sq
1/4" x 3/8"
1/4" x 1/2"
1/4" x 5/8"
5/16" sq
5/16" x 3/8"
5/16" x 7/16"
5/16" x 1/2"
3/8" sq
3/8" x 7/16"
3/8" x 1/2"
3/8" x 5/8"
9/16" sq
7/16" sq
7/16" x 5/8"
1/2" sq
1/2" x 5/8"
1/2" x 3/4"
1/2" x 1"
3/8" x 3/4"
 
5/8" sq
5/8" x 3/4"
5/8" x 7/8"
5/8" x 1"
3/4" sq
3/4" x 7/8"
3/4" x 1"
3/4" x 1 1/4"
7/8" sq
7/8" x 1"
7/8" x 1 1/2"
1" sq
1" x 1 1/4"
1" x 1 1/2"
1" x 1 5/8"
1 1/8" sq
1 1/4" sq
1 1/4" x 1 3/4"
1 1/4" x 2"
1 1/2" sq
1 1/2" x 2"
1 3/4" sq
1 3/4" x 2"
2" sq
Metric Sizes
 
4mm sq
5mm sq
6mm sq
6mm x 10mm
7mm x 8mm
8mm sq
16mm x 20mm
8mm x 12mm
9mm x 14mm
10mm sq
10mm x 12mm
10mm x 16mm
11mm x 18mm
12mm sq
12mm x 20mm
14mm sq
14mm x 22mm
14mm x 25mm
15mm sq
16mm sq
8mm x 10mm

16mm x 28mm
18mm x 32mm
20mm sq
20mm x 25mm
20mm x 36mm
22mm sq
22mm x 40mm
24mm sq
25mm sq
25mm x 40mm
25mm x 45mm
28mm sq
28mm x 50mm
30mm sq
32mm x 56mm
32mm sq
36mm sq
38mm sq
40mm sq
45mm sq
50mm sq

Welding

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


Certification

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


Quality Assured Supply

Key Steel bar is supplied in accordance with our ISO 9001 : 2008 registration.


Contact West Yorkshire Steel with your enquiries for square and flat key steel bar.

West Yorkshire Steel Ltd Sandbeck Industrial Estate, Wetherby, Leeds. LS22 7DN UK
Telephone: 01937 584 440 Facsimile: 01937 580 128 sales@westyorkssteel.com
© Copyright 2000-2012 West Yorkshire Steel Limited. All rights reserved. Terms and Conditions
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