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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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GOST 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.
Spring carbon and alloy steel bars. Specifications

Steel Garde:75
Type:Structural Steel
Country:Russia
Standard:GOST
Standard Number:

ITEM Standard Number Descriptions

1 GOST 14959 Spring carbon and alloy steel bars. Specifications
Application:Spring carbon and alloy steel bars. Specifications

ITEM	Standard Number	Descriptions
1	GOST 14959	Spring carbon and alloy steel bars. Specifications

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.72	0.80
Si	0.17	0.37
Mn	0.50	0.80
P		0.035
S		0.035
Cr		0.25
Ni		0.25
Cu		0.20

Mechanical Properties

Tensile strength	706～920	σb/MPa
Yield Strength	388	σ 0.2 ≥/MPa
Elongation	21	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	393～504	-
HRC	30	-

Physical Properties

Thermal expansion	58-73	e-6/K
Thermal conductivity	04-02	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7536-5287	째C
Density	7718-5302	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