GBT 25

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25 Profile
25 Chemical composition
25 Mechanical Properties
25 Physical Properties
25 Heat treatment
25 Size Availability
25 Relevant products

Profile

This page is mainly introduced the 25 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 25,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
25

Steel Garde:25
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Relevant products:

NO8020/No8031/N083...

Inconel 625 Bar

Air 9160C 25CD4S Round Bar

1.2581(H21, X30WC...

AISI E2512(SAE J...

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
Q255 A		China
Q255 B		China
H25	ASTM	USA
T20825	UNS	USA
CPM Rex 25	AISI	USA
Stellite 25
Stellite 250
Stellite 251
1.1525	DIN	Germany
C125W	DIN	Germany
1.1625	DIN	Germany
125Cr1	DIN	Germany
125Cr2	DIN	Germany
125CrSi5	DIN	Germany
1.2510	DIN	Germany
1.2516	DIN	Germany
1.2519	DIN	Germany
1.2542	DIN	Germany
1.2550	DIN	Germany
1.2552	DIN	Germany
1.2562	DIN	Germany
1.2564	DIN	Germany
1.2567	DIN	Germany
1.2581	DIN	Germany
X16CrNiSi25-20	DIN	Germany
1.3255	DIN	Germany
1.3257	DIN	Germany
ST25E
ST25E
E256		UK
E256		UK
X25P		UK
X25P		UK
X15CrNiSi25-20	AFNOR	France
X15CrNiSi25-20	AFNOR	France
TS25	AFNOR	France
TS25	AFNOR	France
S25	AFNOR	France
S25	AFNOR	France
S25	AFNOR	France
S25	AFNOR	France
у10A-1	ГОСТ	Russia
у10A-1	ГОСТ	Russia
у11-1	ГОСТ	Russia
у11-1	ГОСТ	Russia
ВК25	ГОСТ	Russia
ВК25	ГОСТ	Russia
SS14:2511	SS	Sweden
SS14:2514	SS	Sweden
SS14:2514	SS	Sweden

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	683～459	σb/MPa
Yield Strength	066	σ 0.2 ≥/MPa
Elongation	86	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	959～724	-
HRC	30	-

Physical Properties

Thermal expansion	84-98	e-6/K
Thermal conductivity	24-44	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	5806-9423	째C
Density	7342-3959	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)
25 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