817M40 ANNEALED / EN24 ANNEALED Bright drawn 1.1/2% nickel chromium molybdenum steel


BS970: 1955 BS970: 1991 COLOUR CODE DESCRIPTION
EN24 ANNEALED817M40 ANNEALEDblue/brownBright drawn 1.1/2% nickel chromium molybdenum steel
CHEMICAL ANALYSIS
Car0.36 / .044
Sil0.10 / 0.40
Mang0.45 / 0.70
Phos0.035 max
Sul0.040 max
Chr1.00 / 1.40
Moly0.20 / 0.35
Nick1.30 / 1.70
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 Hardness277 max
INTERNATIONAL SPECIFICATION COMPARISON
BRITISH BS 970:1991 817M40 ANNEALED
BRITISH BS 970:1955 EN24 ANNEALED
GERMAN DIN 34NiCrMo6
FRENCH AFNOR35NCD6
SWEDISH SS2541
AMERICAN SAE4340
EUROPEAN STEEL NO.1.6582
EUROPEAN STEEL NAME34CrNiMo6
EUROPEAN STANDARDEN10277-5
QUICK VIEW SYSTEM
MACHINEABILITY50
WELDABILITYPre / post heat precaution required
HARDENABILITYHigh strength up to 100mm dia
SELECTION GUIDE AND USAGE EXAMPLESMax h/b 277 enabling good machineability prior to direct hardening


SIZES.

Size (mm. dia) 10.0013.0016.0020.0025.0030.0035.0040.0045.0050.0060.0075.00  


Size (ins.) 0.984 x 0.3942.1/2 x 23 x 1.1/43 x 1.1/2  


Size (mm) 25 x 10