GB 60SI2MN Steel is a high quality Alloy Spring Steel, It belong to the high quality high carbon alloy Spring Steel. Quenched & Tempered Hardness is 28-34 HRc. 60SI2MN steel Annealing delivery hardenss less than 250HB.

Chemical composition

C(％)	0.56-0.64	Si(％)	1.50-2.00	Mn(％)	0.60-0.90	P(％)	≤0.035
S(％)	≤0.035	Cr(%)	0.35max	Ni(%)	0.35max

Equivalent Of 60SI2MN alloy Spring Steel

USA	Germany	China	Japan	France	England	Italy	Poland	ISO	Austria	Sweden	Spain
AISI/SAE/ASTM/UNS	DIN,WNr	GB	JIS	AFNOR	BS	UNI	PN	ISO	ONORM	SS	UNE
	60Si7 / 1.0909	60Si2Mn	60SI2MN	60S7				61SiCr7

Heat treatment Related

Annealing of 60SI2MN Spring Steel

Slowly heated to 740-770 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. The 60SI2MN tool steel will get MAX 250 HB （Brinell hardness）.

Hardening of 60SI2MN Spring Steel

60SI2MN steels should be heated uniformly to 830-860°C (1526-1580°F) until completely heated through. About 30 min per 25 mm of ruling section is to be provided and then the steels should be immediately quenched in oil. Get Hardness 61 Min.

Tempering of 60SI2MN Spring Steel

Tempering of 60SI2MN steels is performed at 480-530°C, Soak well at the selected temperature and soak for at least one hour per 25mm of total thickness. Hardness values at different temperatures after tempering HRC: 150°C-61HRc,200°C-60HRC,300°C-56HRC,400°C-51HRC,500°C-43HRC,550°C-38HRC,600°C-33HRC,650°C-29HRC.

Mechanical Properties

The mechanical properties of 60SI2MN Spring Steels are outlined in the following table.

Tensile strength	Conditions to yield strength	Elongation	Reduction of area	Hardness (Hot Rolled)	Hardness (Cold Drawn)
σb (MPa)：≥1274(130)	σ0.2 (MPa)：≥1176(120)	δ10 (%)：≥5	ψ (%)：≥25	≤321HB;

Applications

60SI2MN steels, Highlight the advantage is good hardenability, another hot working performance, comprehensive mechanical properties,

Decarburization resistance is also good big cross section of various important spring, such as automobile, locomotive, large plate spring, spring, etc. 60SI2MN Spring main used for heavy vehicles, tractors, industrial production load, stress and the diameter of the larger plate spring and helical spring

60Si2Mn Spring Steel