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GB 70 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of GB 70

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GBT GB 70

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This page is mainly introduced the GB 70 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of GB 70,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
70

Steel Garde:GB 70
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Relevant products:

21CMoV5-7,1.7709,2...

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
UNS G10170	UNS	USA
HAP 70	AISI	USA
C70W1		Germany
C70W2	DIN	Germany
1.2703	DIN	Germany
1.2709	DIN	Germany
70Si7	DIN	Germany
SK70	JIS	Japan
TC70	JIS	Japan
SS14:1770	SS	Sweden
SS14:1770	SS	Sweden
SS14:—	SS	Sweden
SS14:—	SS	Sweden
SS14:2700	SS	Sweden
SS14:2700	SS	Sweden
S14:2705	SS	Sweden
C70U	ISO	ISO
C70U	ISO	ISO
UNS S15700	UNS	USA
UNS S15700	UNS	USA
UNS S17700	UNS	USA
S15700	UNS	USA
S15700	UNS	USA
S17700	UNS	USA
S17700	UNS	USA
AISI 651	AISI	USA
AISI 651	AISI	USA
AISI 670	AISI	USA
UNS N07041	UNS	USA
UNS N07001	UNS	USA
UNS H15470	UNS	USA
UNS N07002	UNS	USA
UNS N07090	UNS	USA
UNS N07032	UNS	USA
1.4700	DIN	Germany
1.4704	DIN	Germany
1.4870	DIN	Germany
X70CrMnNiN21-6	DIN	Germany
1.4570		UK
Z70C15	AFNOR	France
Z70CD15CI	AFNOR	France
1.4870	AFNOR	France
SS14 2370	SS	Sweden
SS14 2370	SS	Sweden
SS14 2570	SS	Sweden
SS14 2570	SS	Sweden
UNS J95705	AISI	USA
UNS J93970	AISI	USA
1.6570	DIN	Germany
SS 2370	SS	Sweden

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	311～225	σb/MPa
Yield Strength	998	σ 0.2 ≥/MPa
Elongation	88	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	798～946	-
HRC	30	-

Physical Properties

Thermal expansion	63-17	e-6/K
Thermal conductivity	02-03	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7828-4562	째C
Density	6031-7039	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)
GB 70 Special Alloy	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