Stainless steel spring wire / 65Mn high tensile steel wire for spring

Stainless steel spring wire / 65Mn high carbon steel wire for spring

Carbon spring steel wire is the largest amount of steel class.
It is containing 0.60% to 0.90% carbon and 0.3% to 1.20% manganese, no other alloying elements added, a relatively low cost. Carbon spring steel wire through appropriate processing or heat treatment, you can get a very high tensile strength, toughness and good enough fatigue life. But carbon steel hardenability low, poor sag resistance and corrosion resistance, the larger the temperature coefficient of the elastic modulus (up to 300 × 10-6 / °C), for the manufacture of small cross-section, the lower operating temperature (120 °C>) springs.

Spring steel wire Process: (steel) rod - Surface treatment - wire drawing

The normal type steel is YB/T5220-93 - carbon steel wire for non-mechanical spring

This standard applies to the sofa cushion springs, cushions, backrest tension spring, retainer, spring clip and other non-carbon spring steel wire for mechanical springs.

According to the requirements of different tensile steel wire into A1, A2, A3 ... A9 nine constituencies, the tensile strength of the deviation ≤ 200Mpa. As the table:

High tensile Mattress steel springs generally used A3 and A4 groups. The standard steel springs basically static, finished steel only assessment tensile strength, bending three winding and a single performance.

• A1-A3 group of 45 to 70 steel wire selected,
• A3 ~ A6 group select 65Mn or 70 steel wire,
• A7 ~ A9 group select  70 or T8MnA (82B) steel wire

black high tensile spring steel wire

Popular 65Mn spring steel wire
Manganese improve hardenability. Lower than the silicon surface decarburization tendency, mechanical properties after heat treatment is better than carbon steel, but with thermal sensitivity and temper brittleness.

Used for: a variety of flat, round springs, seat springs, spring winding, can also produce a spring ring, valve springs, clutch springs, brake springs and cold drawn steel cold roll coil springs.

65Mn spring steel wire Chemical Composition:  C: 0.62 ~ 0.70  Si: 0.17 ~ 0.37   Mn: 0.90 ~ 1.20   S: ≤ 0.035   P: ≤ 0.035   Cr: ≤ 0.25   Ni: ≤ 0.25   Cu: ≤ 0.25
65Mn spring steel wire Mechanical properties:
Tensile strength σb (MPa): ≥ 980 (100)
Yield strength σs (MPa): ≥ 784 (80)
Elongation δ10 (%): ≥ 8
Reduction of ψ (%): ≥ 30

Stainless steel spring wire 304 316 310s 321 is available, welcome to contact me if needed!