SSA7218 Chromium Case-Hardened Steel

Type of steel and characteristics:
Low alloy chromium, molybdenum heat treatable steels

Components with large and medium cross sections, requiring with high tensile strength and toughness, automotive engineering and gear and engine construction, e.g. crankshafts, steering knuckles, shafts, connecting rods, spindles, intermediate gears, pump and gear shafts. It is also suitable for barrels of small fire arms. Also possessed good surface hardenability. It is highly recommended for applications requiring good weldability.

Chemical Composition (%) C Si Mn Cr Mo
0.22-0.29 < 0.40 0.60-0.90 0.90-1.20 0.15-0.30
Nearest Equivalent AISI 4130 JIS SCM 420 DIN 52CrMo4 BS 708A25 UNI 25CrMo4

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