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XM-21 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of XM-21

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UNS XM-21

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This page is mainly introduced the XM-21 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of XM-21,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.

Chemical compositions of SAE wrought stainless steels

Steel Garde:XM-21
Type:Stainless Steels
Country:USA
Standard:UNS
Standard Number:

ITEM Standard Number Descriptions

1 SAE J 405 (1998) Chemical compositions of SAE wrought stainless steels
Metallographic Structure:Austenite
Application:Chemical compositions of SAE wrought stainless steels

ITEM	Standard Number	Descriptions
1	SAE J 405 (1998)	Chemical compositions of SAE wrought stainless steels

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
A 240 Type XM-21	SAE	USA
A 276 XM-21	SAE	USA
A 959 Type XM-21	SAE	USA
SA-276 XM-21	AMS	USA
A 240 S30452	SAE	USA
A 276 S30452	SAE	USA
S30452	AISI	USA
SA-240 S30452	AMS	USA
A 240 S30452	SAE	USA
A 276 S30452	SAE	USA
S30452	AISI	USA
SA-240 S30452	AMS	USA

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C		0.08
Si		1.00
Mn		2.00
P		0.045
S		0.03
Cr	18.0	20.0
Ni	8.00	10.5
N	0.16	0.30

Mechanical Properties

Tensile strength	089～331	σb/MPa
Yield Strength	525	σ 0.2 ≥/MPa
Elongation	96	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	505～230	-
HRC	30	-

Physical Properties

Thermal expansion	62-53	e-6/K
Thermal conductivity	06-48	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	2319-8946	째C
Density	1876-4826	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)
XM-21 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