S24000 - ASTM A479/A479M-2025

USA UNS	S24000
ASTM Specification or Grade	XM-29
Corresponding Standard	ASTM A479/A479M-2025 Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
Classification	Austenitic Stainless Steel

Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	N
Minimum Value	-	-	11.5	-	-	17	2.3	0.2
Maximum Value	0.08	1	14.5	0.06	0.03	19	3.7	0.4

Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
All specifications	Annealing	≥690	≥380	in 2 in.[50 mm] or 4D ≥30	① ≥50

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