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08F chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 08F

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GB 08F

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This page is mainly introduced the 08F chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 08F,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Delivery status: hot or hot forging
This standard specifies the alloy steel, low alloy steel, alloy steel chemical composition relative to the provisions of the finished steel smelting chemical composition boundary limit allowable deviation, and gives the definition of related terms.

R_eL (MPa)	R_m (MPa)	Z (%)	A_5.65 (%)	Heat treatment condition	Technology	Sampl
175(≥)	295(≥)	60(≥)	35(≥)	Normalizing	930℃ Heat preservation≥30min AC Normalizing	25(Sampl size)

HBS: 131(≤)

Steel Garde:08F
Type:Structural Steel
Country:China
Standard:GB

Standard Number:

ITEM	Standard Number	Descriptions
1	GB/T 699-1999	This standard specifies the alloy steel, low alloy steel, alloy steel chemical composition relative to the provisions of the finished steel smelting chemical composition boundary limit allowable deviation, and gives the definition of related terms.
2	GB 13237-1991
3	GB/T 13793-1992
4	GB 3206-1982
5	GB/T 711-2008
6	GB 3275-1991
7	GB 699-1988
8	GB 710-1991
9	GB 711-1988

Application:This standard specifies the alloy steel, low alloy steel, alloy steel chemical composition relative to the provisions of the finished steel smelting chemical composition boundary limit allowable deviation, and gives the definition of related terms.

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
U20082	GB	China

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.05	0.11
Si		0.03
Mn	0.25	0.5
P		0.035
S		0.035
Cr		0.1
Ni		0.3
Cu		0.25

Mechanical Properties

Tensile strength	205～128	σb/MPa
Yield Strength	759	σ 0.2 ≥/MPa
Elongation	10	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	782～480	-
HRC	30	-

Physical Properties

Thermal expansion	45-48	e-6/K
Thermal conductivity	34-88	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	5472-6821	째C
Density	5131-7983	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)
08F 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