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ZGTModel 65Mn -Hight Carbon Steel Plate

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65Mn steel is a high-carbon steel mainly used for manufacturing springs and other parts requiring high strength and good hardenability, such as tools. In major Chinese steel mills, it is a preferred material for making blades and knives in the blade industry.

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What metal is 65Mn?
65Mn steel is a high-carbon steel mainly used for manufacturing springs and other parts that require high strength and good hardenability, such as tools. In major Chinese steel mills, it is used as a spring steel plate in the blade industry, making it the preferred material for manufacturing swords and knives.
What is the HRC of 65Mn carbon steel?
The hardness range of 65Mn steel is generally between HRC45-60. This hardness range ensures that spring parts have sufficient strength during use while maintaining adequate toughness to prevent breakage under stress.
How do you heat treat 65Mn steel?
At first Slowly heated to 730 ºC 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).

Due to its high hardness, strength, and wear resistance, 65Mn steel is widely used in the following fields:

Springs: Used for manufacturing various mechanical springs, automotive suspension springs, clutch springs, etc.

Cutlery and Tools: Suitable for making gardening tools, hand tools, saw blades, etc.
Hammers and Impact Tools: Used for making various hammer heads, impact tools, chisels, etc.
Wear-resistant Parts: Widely used for making bearings, gears, chains, and other parts that require high wear resistance.

Highlight: Cutlery Steel
Edge Heat Treatment and Full Piece Heat Treatment: Edge heat treatment hardness can reach up to 50 HRC, while full piece heat treatment generally achieves 48-50 HRC. Many customers report that 65Mn performs exceptionally well in terms of sharpness and toughness. In agricultural tools, it can cut through wire without chipping; in slicing knives, it offers clean cuts and good durability; in crushing knives, it shows good toughness and longevity, reducing the need for frequent replacements.

Characteristics of Cutlery Steel
High Carbon Content: Can easily be heat-treated to achieve high hardness, but has relatively high brittleness and poor formability. Regular hot-rolled steel bends to 60 degrees before cracking (many carbon steels can bend to 90 degrees with a large radius).
Manganese Content: Provides some elasticity and fatigue resistance, making it a type of spring steel.

Market Acceptance
Medium to high special steel customized 65Mn plates have been accepted for a long time. Some customers report using it as wear-resistant steel, stating that the wear resistance of untreated 65Mn plates with high carbon and manganese content can match that of standard NM400 steel.

Property: Value

  • Density: 7.85 g/cm3
  • Tensile strength:  ≥1274MPa
  • Yield Strength:  ≥785MPa
  • Elongatio: ≥8%
  • Reduction of Area: ≥30%
  • Impact Toughness: ≥24%
  • Annealed Hardness:  217-255
  • Quenched Hardness: ≥45