637M17 / EN352 Bright / black 1% nickel chromium case hardening steel


BS970: 1955 BS970: 1991 COLOUR CODE DESCRIPTION
EN352637M17orange/yellowBright / black 1% nickel chromium case hardening steel


CHEMICAL ANALYSIS
Car0.14 / 0.20
Sil0.10 / 0.40
Mang0.60 / 0.90
Chr0.60 / 1.00
Nick0.85 / 1.25


INTERNATIONAL SPECIFICATION COMPARISON
BRITISH BS 970:1991 637M17
BRITISH BS 970:1955 EN352
GERMAN DIN  
FRENCH AFNOR20NC6
SWEDISH SS2512
AMERICAN SAE3120
EUROPEAN STEEL NO. 
EUROPEAN STEEL NAME 
EUROPEAN STANDARD 


QUICK VIEW SYSTEM
MACHINEABILITY75
WELDABILITYPre / post heat precaution required
HARDENABILITYLow alloy case hardening
SELECTION GUIDE AND USAGE EXAMPLESAs EN351 but higher strength. pinions, layshafts, and camshafts


SIZES.

Size (ins. dia) 1.329