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ASTM9260 Spring Steel

ASTM9260 Spring Steel

ASTM9260 Spring Steel
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ASTM9260 Spring Steel



Material Name


Material Name: 9260
Execution standard:ASTM A29/A29M-04

Characteristics and scope of application


It is widely used martinel Spring Steel, strength, elasticity and hardenability are higher than 55Si2Mn. Suitable for railway vehicle, automobile tractor industry production bear a larger load or a flat spring wire diameter in the spiral spring below 30mm. It is also suitable for the manufacture of a heat resistant spring in a non corrosive medium with a temperature below 250℃, and a large important coil spring which is subjected to alternating load and high stress work.


Chemical Composition


C Si Mn S P Cr Ni Cu
0.56～0.64 1.8～2.20 0.75～1.00 Below 0.040 Below 0.035
 Below 0.35 Below 0.35 Below 0.25

Mechanical Property


Tensile strength
σb (MPa) 		Yield Strength
σs (MPa)
Elongation
δ10 (％)
reduction of crosssection area
ψ (％)
                      Hardness
hot rolling                        cold-drawn+heat treatment

Above 1274 Above 1176 Above 5 Above 25
 Below 321HB                    Below 321HB

specification of heat treatment and metallurgical structure


Specification of heat treatment : hardening 870℃±20℃  oil cooling; tempering 480℃±50℃ (±30℃ when needed)
Metallurgical Structure: tempered troostite

Delivery State


Delivery in heat treatment or non heat treatment state with hot rolled steel, and in heat treatment state with cold drawn steel.