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27SiMn chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 27SiMn

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GB 27SiMn

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This page is mainly introduced the 27SiMn chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 27SiMn,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
27SiMn

Steel Garde:27SiMn
Type:Structural Steel
Country:China
Standard:GB

Standard Number:

ITEM	Standard Number	Descriptions
1	GB/T 11251 (2009)	Hot-rolled alloy structural steel plates
2	GB/T 17396 (2009)	Hot-rolled seamless steel tubes for hydraulic pillar service
3	GB/T 3077 (1999)	Alloy structure steels
4	GB/T 3078 (2008)	Quality structural steel cold drawn bars
5	GB/T 8162 (2008)	Seamless steel tubes for structural purposes

Application:Structural and constructional steels

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.24	0.32
Si	1.10	1.40
Mn	1.10	1.40
P		0.035
S		0.035
Cu		0.30
Cr		0.30
Ni		0.30
Mo		0.15

Mechanical Properties

Tensile strength	664～077	σb/MPa
Yield Strength	704	σ 0.2 ≥/MPa
Elongation	98	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	171～349	-
HRC	30	-

Physical Properties

Thermal expansion	92-96	e-6/K
Thermal conductivity	71-89	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	6129-5067	째C
Density	7295-2440	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)
27SiMn 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