65MN Chemical composition
C(％) | 0.62-0.70 | Si(％) | 0.17-0.37 | Mn(％) | 0.90-1.20 | P(％) | ≤0.035 |
S(％) | ≤0.035 | Cr(%) | 0.25max | Ni(%) | 0.25max | | |
Equivalent Of 65Mn alloy Spring Steel
USA | Germany | China | Japan | France | England | Italy | Poland | ISO | Austria | Sweden | Spain |
AISI/SAE/ASTM/UNS | DIN,WNr | GB | JIS | AFNOR | BS | UNI | PN | ISO | ONORM | SS | UNE |
1066 | | 65Mn | | | 080A67 | | | | | | |
| | | | | | | | | | | |
Heat treatment Related
- Annealing of 65Mn Spring Steel
At first Slowly heated to 730 ℃ and allow enough times, let the
steel to be thoroughly heated, Then cool slowly in the furnace.
Then 65Mn tool steel will get MAX 250 HB (Brinell hardness).
At the beginning, 65Mn steels should be heated uniformly to
830-860°C (1526-1580°F) until completely heated through. After
about 30 min per 25 mm of ruling section is to be provided and then
the steels should be immediately quenched in oil. Tempering of 65Mn
Spring Steel
Tempering of 65Mn steels is performed at 540°C, Soak well at the
selected temperature and soak for at least one hour per 25mm of
total thickness. Hardness values at different temperatures after
tempering
Mechanical Properties
The mechanical properties of 65Mn Spring Steels are outlined in the
following table.
Tensile strength | Conditions to yield strength | Elongation | Reduction of area | Hardness (Hot Rolled) |
σb (MPa):≥980 | σ0.2 (MPa):≥785 | δ 5 (%):≥8 | ψ (%):≥30 | ≤302HB; |
| | | | |
Applications
65Mn steel, after heat treatment and cold drawing hardening, high
strength, it has a certain toughness and plasticity; In the same
surface hardening case, completely and the fatigue limit and alloy
spring. But hardenability poor, mainly for the smaller size of the
spring, such as regulating speed regulating spring, spring load,
general machinery in the round, square spiral spring or pull wire
for small mechanical spring.
Regular size and Tolerance
Steel round bar: Diameter Ø 2mm – 3000mm
Steel plate: Thickness 2mm – 3000mm x Width 100mm – 3500mm
Steel Hexagonal bar: Hex 5mm – 105mm
Others 65Mn have not specified size, pls contact our experienced
sales team.
Processing
Moreover, GB 65Mn Spring Steel round bar and flat sections can be
cut to your required sizes. 65Mn Spring Steel ground bar can also
be supplied by us, providing a high quality Spring Steel precision
ground Spring Steel bar to your required tolerances. And GB 65Mn
steel is also available as Ground Flat Stock / Gauge Plate, in
standard and nonstandard sizes.
