SUP10 Spring Steel Wire


SUP10 steel is chromium vanadium type spring steel. It's a comparative composite steel to SAE 5150 steel with little, yet compelling, vanadium expansion, to import more noteworthy hardness. SUP10 has low mutilation properties and is effectively heat treated. The SUP10 steel grade is reasonable for oil solidifying and treating.


SUP10 steel is normally provided in the as moved condition. When utilized in the oil solidified and tempered condition SUP10 spring steel joins spring qualities with fantastic protection from both scraped spot and shock. Solidified SUP10 steel offers incredible strength and shock opposition which make it an appropriate amalgam spring steel for parts presented to pressure, vibration and shock.


SUP10 is a spring steel with good mechanical properties and process performance. SUP10 steel has high hardenability. The addition of vanadium can refine the grain of the steel, reduce overheating sensitivity, improve strength and toughness, and have high The fatigue strength and yield ratio are also high, but the weldability is poor, and the cold deformation plasticity is low. SUP10 is a kind of higher-grade spring steel, used as a high-load important spring with a larger cross-section, and a valve spring, piston spring, and safety valve spring with an operating temperature of <300°C.


WixSteel Industrial SUP10 spring steel wire in stock photos



SUP10 Steel Chemical Composition:


  • Carbon: 0.47~0.55
  • Silicon: 0.15~0.35
  • Manganese: 0.65~0.95
  • Sulfur: ≤0.030
  • Phosphorus: ≤0.030
  • Chromium: 0.80~1.10
  • Nickel: ≤0.35
  • Copper: ≤0.25
  • Vanadium: 0.15~0.25


SUP10 Steel Mechanical Properties:


  • Tensile strength σb (MPa): ≥1274(130)
  • Yield strength σs (MPa): ≥1127(115)
  • Elongation δ5 (%): ≥10
  • Reduction of area ψ (%): ≥40
  • Hardness: hot rolled, ≤321HB; cold drawn + heat treatment, ≤321HB


SUP10 Steel Heat treatment specification: 



1200-1250F (650-675ºC), equalize.



1100-1300F (595-740ºC), hold 2 hours, air cool. As with 5150 alloy, the microstructure for this 6150 alloy steel to give optimum machinability is one of coarse lamellar pearlite to coarse spheroidite.



A nominal normalizing temperature for the 6150 spring steel is 1650ºF (900ºC.) This treatment is followed by air cooling.



Best done warm 400-800F (205-425ºC).


High Heat:

1550-1650F (845-900ºC), soak 10 to 30 minutes. For vacuum hardening, use the high side of the high heat range and soak times.



Oil quench to hand warm, 150F (65ºC). Temper SAE 6150 steel immediately. Note vacuum furnaces must have oil quench capability.



Tempering at 400-1200 (205-650ºC) for 1 hour per inch (25mm) of thickness at temperature is recommended. (2 hours min.). Air cool to room temperature. Tempering of the AISI 6150 grade steel will be between 400-600°C for most applications.



SUP10 spring steel can be welded, however, preheating and post weld stress relieving have to be performed for welding this steel.



It’s commonly used in heavily stressed machinery parts including shafts, gears, pinions and also in hand tool components. SUP10 steel is also widely in the motor vehicle industry, SUP10 is suitable for many general engineering applications that require high tensile strength and toughness.



Delivery status: 


Hot-rolled steel is delivered in heat-treated or non-heat-treated state, and cold-drawn steel is delivered in heat-treated state.


Equivalent Grade:


  • American brand: G61500
  • Chinese brand: 50CrVA
  • German grade: 51CrV4
  • British grade: 735A51
  • French grade: 50CV4



Related  Spring Steel Wire Materials