BO1 Non shrinking oil hardening tool steel


BS 4659 COLOUR CODE DESCRIPTION
GRADE O1BO1silver/blueNon shrinking oil hardening tool steel
CHEMICAL ANALYSIS
Car0.85 / 1.40
Sil0.40 max
Mang1.10 / 1.35
Phos0.035 max
Sul0.035 max
Chr0.40 /0.60
Van0.25 max
Tung0.40 / 0.60
MECHANICAL PROPERTIES
Tensile Strength N/MM2 Min Rm  
Yield Stress N/MM2 Min Rm  
Elongation A Min % on 5.65√SO  
Izod Min 
Kcv Min 
Proof Stress 0.2% N/MM2 Min 
Brinell Hardnessann'd 229max
INTERNATIONAL SPECIFICATION COMPARISON
BS 4659 GRADE O1
BS 4659 BO1
GERMAN DIN  
FRENCH AFNOR90MCW5
SWEDISH SS 
AMERICAN SAEO1
EUROPEAN STEEL NO.1.2510
EUROPEAN STEEL NAME100MnCrW4
EUROPEAN STANDARD 
QUICK VIEW SYSTEM
MACHINEABILITY90
WELDABILITYNot recommended
HARDENABILITYGood
SELECTION GUIDE AND USAGE EXAMPLESGeneral purpose tool steel. Tough hard and economical. Press tool punches, moulding dies


SIZES.

Size (ins. dia) 1/23/411.1/41.1/21.3/422.1/233.1/2456 


Size (ins.) 2 x 12 x 1.1/23 x 13 x 24 x 14 x 1.1/4
4 x 1.1/24 x 24 x 36 x 16 x 1.1/46 x 1.1/2
6 x 28 x 3/48 x 110 x 2  


Size (ins. sq)1.1/2234