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BT21 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of BT21

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BT21

Catalog

BT21 Profile
BT21 Chemical composition
BT21 Mechanical Properties
BT21 Physical Properties
BT21 Heat treatment
BT21 Size Availability
BT21 Relevant products

Profile

This page is mainly introduced the BT21 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of BT21,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.

Steel Garde:BT21
Type:Special Alloy
Country:UK
Application:Carbide for cutting tools

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
BT21		UK

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	959～523	σb/MPa
Yield Strength	131	σ 0.2 ≥/MPa
Elongation	98	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	555～940	-
HRC	30	-

Physical Properties

Thermal expansion	91-24	e-6/K
Thermal conductivity	50-36	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7703-6159	째C
Density	9168-0411	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)
BT21 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