Model Number: hot forged steel bar -20 Brand Name: Unite Steel Key Specifications/Special Features: Forged steel with heat treated 665M17Description:A medium alloy nickel-molybdenum case-hardening steel which may be carburised and hardened to produce a hard wear resistance case and developing a core strength of the order of 770N/mm. It has good impact properties, very good resistance to stock and freedom from temper brittleness.Applications:gears, shafts, pinions, tappets, valve rockers, collets, track pins, steering balls and worms, transmission components, breech mechanisms and small arms parts.Related specifications:
Great Britain EN34

ISO 16Ni3Cr2

SAE 4615

Chemical composition (%):

Carbon 0.14 - 0.20

Silicon 0.10-0.40

Manganese 0.35-0.75

Phosphorus 0.035 max

Sulphur 0.040 max

Nickel 1.50-2.00

Molybdenum 0.20-0.30

Process: EAF + LF + VD + forged + heat treatment(optional)

Size range:

Round:

Hot forged: 80mm-1200mm

Flat:

Hot forged: Thickness:150-600mm Width: up to 1600mm

Surface finishes: Black, Peeled, cold drawn, turned & polished, precision ground

Test: Ultrasonic test according to SEP 1921-84.