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High Strength 65Mn Frame Carbon Steel Plate

Chemical Composition: Carbon C: 0.62 ~ 0.70, Si: 0.17 ~ 0.37, Manganese Mn: 0.90 ~ 1.20, Sulfur S: ≤0.035, P: ≤0.035, Chromium Cr: ≤0.25, Nickel Ni: ≤0.30, Copper Cu: ≤0.25
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  • 65Mn Carbon Plate

  • Huien Metal

Product Description

65Mn steel  belongs to  GB standard spring steel grade, Manganese (Mn) improves hardenability, so the strength, hardness, elasticity and hardenability are higher than that of 65# steel, but it has overheat sensitivity and temper brittleness. Water quenching tends to form cracks. The annealed state has good machinability, low cold deformation plasticity, and poor weldability.

65Mn high carbon steel is mainly used in the manufacture of various small-section flat springs, round springs, clockwork, etc. It can also be used to manufacture spring rings, valve springs, shock absorbers, clutch reeds and brake springs.

Chemical Composition of 65Mn

Standard Grade C Si Mn P S Cr Ni Cu
GB/T 1222 65Mn 0.62-0.70 0.17-0.37 0.90-1.20 ≤0.030 ≤0.030 ≤0.25 ≤0.35 ≤0.25

carbon steel surfaceUsage of 65Mn:

65 Mn mild steel  is a great knife material. It's tough, enduring, and holds a sharp cutting edge for longer than enough for home cooks and most professionals alike.

Element Content (%) What it does
Carbon 0.60 to 0.70 increases hardness, strength, and hardenability.
Manganese 1.10 to 1.20 improves hardness and decreases brittleness.
Silicon 0.15 to 0.40 decreases brittleness and helps steel stay free of damage, defects, and decay.
Nickel 0.35 increases toughness and improves corrosion resistance at high temperatures.
Chromium 0.25 makes steel resist corrosion greatly while improving wear resistance and tensile strength.
Copper 0.25 helps with corrosion resistance but to a lesser degree than chromium.
Sulfur 0.03 reduces weldability and increases brittleness, but low amounts improve machinability.
Phosphorous 0.03 improves machinability and atmospheric corrosion resistance but reduces toughness – the reason why it’s so little.

According to the above data,65Mn is the good quality for knife raw material.For its high Strength 65Mn Frame Carbon Plate offered by China manufacturer Huien. Buy High Strength 65Mn Frame Carbon Plate directly with low price and high quality.

Testing Quality

Mechanical properties: Tensile strength σb (MPa) : ≥980(100)

Hardness: hot rolling,≤302HB; Cold drawing + heat treatment, ≤321HB

Heat treatment specification: quenching 830℃±20℃, oil cold; Temper 540℃±50℃(for special needs,±30℃).

Metallographic structure: Tretinite.

Delivery status: Hot rolled steel to be delivered in heat-treated or non-heat-treated condition, cold drawn steel to be delivered in heat-treated condition.

steel products quality inspection second

quality inspection certificate and bill of lading

Packing Transportation


65Mn carbon structural steel plate is often used in the machinery manufacturing industry, such as automobile equipment accessories manufacturing, mining machinery manufacturing, etc.steel sheet plate packaging

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