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75 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 75

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PN 75

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This page is mainly introduced the 75 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 75,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Steel for springs — Peeled bars, cold drawn bars and wires

Steel Garde:75
Type:Structural Steel
Country:Poland
Standard:PN

Standard Number:

ITEM	Standard Number	Descriptions
1	PN-H-84032 (1974)	Steel for springs - Grades
2	PN-H-93005 (1996)	Steel for springs — Peeled bars, cold drawn bars and wires

Application:Steel for springs — Peeled bars, cold drawn bars and wires

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.72	0.80
Si	0.17	0.37
Mn	0.50	0.80
P		0.040
S		0.040
Cr		0.35
Ni		0.30
Cu		0.25

Mechanical Properties

Tensile strength	053～643	σb/MPa
Yield Strength	265	σ 0.2 ≥/MPa
Elongation	27	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	551～947	-
HRC	30	-

Physical Properties

Thermal expansion	68-59	e-6/K
Thermal conductivity	59-53	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	4410-8552	째C
Density	0262-6336	kg/m³
Resistivity	0.50-0.60	Ohm.mm²/m

Heat Treatment Regime

Annealing	Quenching	Tempering	Normalizing	Q & T
√	√	√	√	√

Size Availability

Steel Grade	Specification	Processing range(mm)
75 Structural Steel	Round Bar and Hollow Bar	Φ1 to Φ2000
	Square and Flat Steel	Φ10 to Φ100
	Plate and Sheet	0.08-800(Thickness)10-1500(Width)Length
	Tube or Pipe	OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
	Coil and Strip Steel	THK:0.1mm Width:1500mm
	Forged	Ring/Cylindrical/Disk