Product  : SUP 9 Spring Steel
Kategori : Spring Steel
Standard: JIS G 4801
Grades   : SUP 9

Equivalent
DIN17221 55Cr3/ 1.7176, GB/T1222 60CrMnA, JIS G4401 steel, BS 527A60, 5160/ G51600

Characteristic
SUP9 has good hardenability
hot working performance

Availability
Flat


Chemical Composition

Symbol of Class	Chemical Composition %
	C	Si	Mn	P Max.	S Max.	Cr	V	B
SUP   3	0.75∼0.90	0.15∼0.35	0.30∼0.60	0.035	0.035	-	-	-
SUP   6	0.56∼0.64	1.50∼1.80	0.70∼1.00	0.035	0.035	-	-	-
SUP   7	0.56∼0.64	1.80∼2.20	0.70∼1.00	0.035	0.035	-	-	-
SUP   9	0.52∼0.60	0.15∼0.35	0.65∼0.95	0.035	0.035	0.65-0.95	-	-
SUP  9A	0.56∼0.64	0.15∼0.35	0.70∼1.00	0.035	0.035	0.70-1.00	-	-
SUP  10	0.47∼0.55	0.15∼0.35	0.65∼0.95	0.035	0.035	0.80-1.10	0.15-0.25	-
SUP 11A	0.55∼0.65	0.15∼0.35	0.70∼1.00	0.035	0.035	0.70-1.00	-	0.0005 min.
SUP  12	0.51∼0.59	1.20∼1.60	0.60∼0.90	0.035	0.035	0.60-0.90	-	-
SUP  13	0.56∼0.64	0.15∼0.35	0.70∼1.00	0.035	0.035	0.70-0.90	-	-
Note : The value of Cu as impurities shall not exceed 0.30%

Mechanical Properties

Properties		SUP9
Tensile Strength Min (MPa)		1226
Proof Stress Min (MPa)		1079
Elongation Min (%)		9
Hardness (HB) Max		363-429
Supplied Condition		Annealed

Physical Properties

Properties		SUP 9
Density (×1000 kg/m3)		7.70
Elastic Modulus (GPa)		190-210
Poisson's Ratio		0.27-0.30
Reduction in Area (%)		48.4
Impact Strength (J)		27.4

Application
Various important spring, such as automobile, locomotive, large plate spring, laminated springs, coiled springs and torsion bar springs, etc.

Related Grade:
SUP 3| SUP 6| SUP 7| SUP 9A| SUP 10| SUP 11A| SUP  12| SUP  13|

Related Steel:

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