S11299-021

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Technical Parameter Table: Stainless Steel Tube S11299-021

Product Name: Stainless Steel Pipes and Tubes for General Service
Designation: S11299-021 (JIS G 3447: SUS 304)
Standard: JIS G 3447 (Japanese Industrial Standard)
Equivalent Grades: ASTM A269 TP304, EN 1.4301, AISI 304
Note: This is the most common and widely used austenitic stainless steel grade.

Parameter Category	Parameter	Value / Description	Notes & Interpretation
Designation Decoding	S11299	JIS G 3447 Standard for Stainless Steel Tubes.	Clearly differentiates it from carbon steel tubes (S11212).
	-021	The suffix “-021” specifically denotes the grade “SUS 304” under JIS G 3447.	“SUS” denotes Japanese Stainless Steel.
Mechanical Properties	Tensile Strength (Rm)	≥ 520 MPa
	Yield Strength (Rp0.2), min	≥ 205 MPa
	Elongation (A), min	≥ 35%	Excellent ductility and formability.
	Hardness (HB), max	≤ 187 HB	Relatively low hardness, contributing to good machinability and formability.
Chemical Composition (Max %)	Carbon (C)	≤ 0.08%	Low carbon content minimizes carbide precipitation during welding.
	Chromium (Cr)	18.00 – 20.00%	Provides excellent corrosion resistance and passive film formation.
	Nickel (Ni)	8.00 – 10.50%	Stabilizes the austenitic structure, providing toughness and formability.
	Manganese (Mn)	≤ 2.00%	Aids in stability of the austenitic structure.
	Silicon (Si)	≤ 1.00%
	Phosphorus (P)	≤ 0.045%	Impurity, controlled.
	Sulfur (S)	≤ 0.030%	Impurity, controlled.
Physical Properties	Density	8.0 g/cm³
	Modulus of Elasticity	~193 GPa
	Melting Range	1400 – 1450 °C
Corrosion Resistance	General Performance	Excellent resistance to a wide range of atmospheric environments and many corrosive media.	Prone to corrosion in chloride-containing environments (pitting, crevice corrosion).
Processing & Applications	Weldability	Excellent	Can be welded by all standard fusion methods, with or without filler metal.
	Formability	Excellent	Can be readily stretched, deep drawn, and spun.
	Heat Treatment	Solution Treatment (Annealing)	Heated to 1010-1120°C and rapidly quenched to dissolve carbides and restore corrosion resistance.
	Typical Applications	– Food and beverage processing equipment – Architectural and decorative applications – Chemical containers – Kitchen equipment and appliances – Heat exchangers (with clean fluids) – General tubing for corrosive services	The most versatile and common stainless steel, used where excellent corrosion resistance and formability are required.