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NA21 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of NA21

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B.S. NA21

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This page is mainly introduced the NA21 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of NA21,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Specification for nickel and nickel alloys: bar

Steel Garde:NA21
Type:Stainless Steels
Country:UK
Standard:B.S.

Standard Number:

ITEM	Standard Number	Descriptions
1	BS 3072	Specification for nickel and nickel alloys: sheet and plate
2	BS 3074	Specification for nickel and nickel alloys: seamless tube
3	BS 3076	Specification for nickel and nickel alloys: bar

Application:Specification for nickel and nickel alloys: bar

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C		0.10
Si		0.50
Mn		0.50
P		0.015
S		0.015
Cr	20.00	23.00
Ni	58.00
Mo	8.00	10.00
Al		0.40
Cu
Ti		0.40
Fe		5.00
Co		1.00
Nb+Ta	3.15	4.15

Mechanical Properties

Tensile strength	767～195	σb/MPa
Yield Strength	880	σ 0.2 ≥/MPa
Elongation	89	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	678～231	-
HRC	30	-

Physical Properties

Thermal expansion	44-75	e-6/K
Thermal conductivity	24-66	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	2691-9565	째C
Density	1822-4712	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)
NA21 Stainless Steels	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