Year1
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Compared with silicon-manganese steel, spring steel has higher tensile strength and yield strength when the plasticity is similar. The steel has greater hardenability and temper brittleness. However, the tensile strength and yield point are both high. Heat treatment overheating sensitivity and decarburization tendency have small hardenability. The critical hardenable diameter in high oil is about ~, but there is a tendency to temper brittleness. It is generally used under quenching and medium temperature tempering. It is used for springs that withstand high stress and operating temperatures below ~℃, such as governor springs, steam turbine seal springs, high-pressure water pump disc springs, condenser support springs, and crusher springs.
Chemical composition
Sulfur:
Phosphorus:
Chromium.～
Nickel:
Copper:
Mechanical properties
Tensile strength :
Yield strength:
Elongation (%):
Reduction of area (%):
Hardness: hot rolling + heat treatment, cold drawing + heat treatment
Heat treatment specifications And metallographic structure
Heat treatment specifications: quenching ℃ ℃ oil cooling tempering ℃ ℃ (when special needs ℃).
Delivery status: Hot-rolled steel is delivered in a heat-treated or non-heat-treated state. Cold-drawn steel is delivered in a heat-treated state.
Density
Density = .g/cubic centimeter. The steel can be cold rolled into steel plates, steel strips and steel wires to make springs. It can also be made into tools such as fitter's chisels and scribing needles. Steel can be used to make small springs with a general cross-sectional size of about ~, such as various small-sized flat and round spring bottom springs and spring springs.
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