Specifications - High Carbon Steel

Please open the specification sections below for details of European and British grade designations and service properties.

European Grade Designations And Chemical Composition - High Carbon Steel
SL : Low tensile static | DM : Medium tensile dynamic | SM : Medium tensile static | DH : High tensile dynamic | SH : High tensile static
EN 10270-1 : 2001 C (a) Si Mn (b) P (max) S (max) Cu (max)
SL, SM, SH 0.35 – 1.00 0.10 – 0.30 0.50 – 1.20 0.035 0.035 0.2
DM, DH 0.45 – 1.00 0.10 – 0.30 0.50 – 1.20 0.02 0.025 0.12
(a) A wide range is stipulated to accommodate the whole range of sizes. For individual sizes, the carbon range is substantially more restricted.
(b) The range of manganese content is wide to cope with various processing situations and the broad size range. The actual figures per size small be more restricted.

 

British Grade Designations And Chemical Composition - High Carbon Steel
NS : Normal duty static | ND : Normal duty dynamic | HS : High duty static | HD : High duty dynamic | M  : High duty static and dynamic (music grade)
BS 5216 : 1991 C Si (max) Mn P (max) S (max)
NS, HS 0.35 – 0.85 0.35 0.40 – 1.00 0.05 0.05
ND, HD 0.45 – 0.85 0.35 0.30 – 1.00 0.03 0.03
M 0.60 – 1.00 0.35 0.25 – 0.75 0.03 0.03

 

Service Properties - High Carbon Steel
SL : Low tensile static | SM : Medium tensile static | SH : High tensile static | NS : Normal duty static | HS : High duty static
M  : High duty static and dynamic (music grade) | DM : Medium tensile dynamic | DH : High tensile dynamic | ND : Normal duty dynamic | HD : High duty dynamic
EN 10270-1 : 2001 BS 5216 : 1991 Service Properties Applications
SL NS Tension, compression or torsion springs subjected to low static stress. Magazine binding wires, hangers, staples.
SM   Tension, compression or torsion springs subjected to medium high static stresses or rarely to dynamic stresses. Binding wires, springs, circlips.
DM ND Tension, compression or torsion springs which are subjected to medium high dynamic stresses. Also for wire forms which require severe bending. Circlips, wire rope, lock levers.
SH HS Tension, compression or torsion springs which are subjected to high static stresses or slightly dynamic stresses. Tyre cord reinforcement.
DH HD Tension, compression or torsion springs or wire forms which are subjected to high static stresses or medium level dynamic stresses. Helical springs, compression springs.
  Tension, compression or torsion springs or wire forms which are subjected to high static and dynamic stresses. Small springs, piano strings, cutting wires.