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SA-268 29-4-2 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SA-268 29-4-2

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AMS SA-268 29-4-2

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This page is mainly introduced the SA-268 29-4-2 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SA-268 29-4-2,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service

Steel Garde:SA-268 29-4-2
Type:Stainless Steels
Country:USA
Standard:AMS

Standard Number:

ITEM	Standard Number	Descriptions
1	SA-268/SA-268M	Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service

Metallographic Structure:Precipitation-Hardening
Application:Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
A 176 S44800	SAE	USA
A 240 S44800	SAE	USA
A 268 S44800	SAE	USA
A 276 S44800	SAE	USA
A 479 S44800	SAE	USA
A 493 S44800	SAE	USA
A 580 S44800	SAE	USA
S44800	AISI	USA
SA-240 S44800	AMS	USA
SA-268 S44800	AMS	USA
SA-276 S44800	AMS	USA
SA-479 S44800	AMS	USA
A 268 29-4-2	SAE	USA
A 511 29-4-2	SAE	USA
A 529 Grade 42	SAE	USA
A 731 Grade 29-4-2	SAE	USA
A 791 Grade 29-4-2	SAE	USA
A 803 Grade 29-4-2	SAE	USA
A 955 XM-29 Grade 420	SAE	USA
A 959 Type 29-4-2	SAE	USA
SA-240 Type 29-4-2	AMS	USA
SA-731 29-4-2	AMS	USA
SA-803 29-4-2	AMS	USA

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C		0.01
Si		0.20
Mn		0.30
P
S
Ni	2.00	2.50
Cr	28.00	30.00
Al
Cu		0.15
Ti
Fe
N		0.02
Mo	3.50	4.20

Mechanical Properties

Tensile strength	060～937	σb/MPa
Yield Strength	213	σ 0.2 ≥/MPa
Elongation	38	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	551～026	-
HRC	30	-

Physical Properties

Thermal expansion	10-47	e-6/K
Thermal conductivity	61-37	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	8107-4996	째C
Density	9756-7690	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)
SA-268 29-4-2 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