30.0mm 4140/709M Peeled Round bar is a 4140 Grade Steel containing 1% Chromium - Molybdenum (Chrome-Moly). Referred to as a high tensile steel alloy steel bar. A general purpose high tensile steel - used for axles - shafts - high tensile studs and bolts - gears and drilling rods.
Tensile Strength (Mpa): 900
Hardness Supplied (HB): 270
Machinability Rating %: 50
HEAT TREATMENT: Suitable for flame and induction hardening. Heat to 840 C - 875 C, hold until temperature is uniform throughout the section, soak for 10 to 15 minutes per 25 mm section, and quench in oil, water, or polymer as required.
