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817M40 - 1.5% Nickel-Chromium-Molybdenum Through Hardening Steel

Surcharge

Both Scrap and most alloys saw a small increase going into April, meaning surcharges for the majority of grades increased slightly.

Nickel has been rising steadily (albeit not significantly) in recent weeks and therefore we would expect to see this filter through to the surcharges in the coming weeks.

Surcharge information as listed via Liberty Speciality Steels where possible, other based on mean chemical analysis for the given grade.

info
£470.99 per tonne

Surcharge Price History for 817M40

APR 18 JUL 18 OCT 18 JAN 19 TODAY
£457.88 £515.56 £481.60 £482.50 £470.99

Description

817M40 grade steel is a general purpose steel used for a wide range of engineering parts.

It is capable of being heat treated to produce a wide range of tensile strengths combined with good ductility and resistance to shock.

It has good hardenability, enabling it to be used for medium tensile strengths in fairly large sections, and possesses good resistance to wear. At low temperatures good impact values can also be obtained.

Bars are often supplied in the hardened and tempered condition with a tensile strength range of 850-1000 N/mm². The material is readily machinable so that the components can be put into service without the cost of further treatment.

Bars can also be supplied in the softened state which require hardening and tempering, but give increased machinability.

Nickel-chromium-molybdenum steels benefit from a combination of alloying elements. Nickel imparts toughness; chromium depth of hardness; molybdenum inhibits temper brittleness and each element tends to reduce grain size.

Typical applications of 817M40 grade steel

  • Shafts
  • Connection rod bolts
  • Push rods
  • Studs
  • Pinion sleeves
  • Mandrel bars for tube manufacturing
  • Breech mechanism parts
  • High-duty engine connecting rods
  • High temperature bolts in oil refining and steam installations
  • Various parts of machine tools, such as spindle gears, power transmission gears and slide cams

817M40 steel is still often referred to as EN24 steel - its equivalent grade under the previous BS 970: 1955 standard.

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PRODUCTION METHOD

Rolled or Forged

FINISHES

Black Bar or Bright Bar

Similar Grades

Grades for Potential Substitution (Greater)