What is the density of 304?

8000 kg/m³ — the figure the weight calculators on this site use for 304. The value is Outokumpu / stainless technical resources’s.

What is the chemical composition of 304?

C ≤ 0.07, Si ≤ 0.75, Mn ≤ 2, P ≤ 0.045, S ≤ 0.03, Cr 17.5–19.5, Ni 8–10.5, N ≤ 0.1, in mass %, to ASTM A240. An element the standard sets no requirement for is left blank here rather than written as zero.

What are the mechanical properties of 304?

Tensile ≥ 515 MPa, Yield ≥ 205 MPa, Elongation min ≥ 40 % — ASTM A240, Plate/Sheet/Strip, Annealed. Those are the standard’s requirements; the mill test certificate governs the metal delivered.

304 — properties and composition — Hidayath Metal Industries

Designations

UNS: S30400
EN number: 1.4301
EN name: X5CrNi18-10
AISI: 304

Density

Density: 8000 kg/m³
Per: Outokumpu / stainless technical resources
Corrosion resistance: Good
Product forms: Sheet, plate, pipe, tube, bar

Chemical composition

Chemical composition — mass %
Standard	Product form	Basis	C	Si	Mn	P	S	Cr	Ni	N
ASTM A240	Plate/Sheet/Strip	Specification	≤ 0.07	≤ 0.75	≤ 2	≤ 0.045	≤ 0.03	17.5–19.5	8–10.5	≤ 0.1

mass %. A blank cell means the standard sets no requirement for that element, not zero. Single values are limits: "≤" a maximum, "≥" a minimum.

Reference values from the cited standards. They describe what the standard requires, not a specific heat of material; the mill test certificate governs what is delivered.

Mechanical properties

Mechanical properties
Standard	Product form	Condition / temper	Thickness	Test temperature	Yield	Tensile	Elongation min	Hardness max	Notes
ASTM A240	Plate/Sheet/Strip	Annealed	–	20 °C	0.2% offset ≥ 205 MPa	≥ 515 MPa	40 % (2 in / 50 mm gauge basis (product dependent))	92 HRB	Minimum values; confirm thickness-specific clauses in current edition.
EN 10088-2	Flat products	Solution annealed	≤ 75 mm	20 °C	Rp0.2 ≥ 210 MPa	520–720 MPa	45 % (A (thickness/product dependent))	–	Representative EN flat-product range; verify exact thickness table.

Each row is one standard, one product form and one condition — the values do not transfer across rows. A blank cell means the standard sets no requirement.

Reference values from the cited standards. They describe what the standard requires, not a specific heat of material; the mill test certificate governs what is delivered.

Physical properties

Physical properties
Temperature	Density	Young’s modulus	Poisson’s ratio	Thermal expansion (20–100°C)	Thermal conductivity (20°C)	Specific heat	Electrical resistivity (20°C)	Melting range	Magnetic
20 °C	8000 kg/m³	193 GPa	0.29	17.2 µm/m·°C	16.2 W/m·K	0.5 kJ/kg·°C	0.72 µΩ·m	1400–1450 °C	Generally non-magnetic annealed; can become magnetic after cold work

Reference values from the cited standards. They describe what the standard requires, not a specific heat of material; the mill test certificate governs what is delivered.

Typical applications

Food, architectural, process equipment, general fabrication

Approximate equivalents

Approximate equivalents: equivalents are a technical reference, not a substitution instruction, verify against project specification.

Approximate equivalents
Grade	Systems	Relationship	Note	Key difference
304	ASTM/AISI/UNS → EN	Same grade, another designation	Commonly cross-referenced designation for the same general grade family.	Verify product standard and chemistry before substitution. Compared designation: 1.4301 / X5CrNi18-10.

Common questions

01What is the density of 304?: 8000 kg/m³ — the figure the weight calculators on this site use for 304. The value is Outokumpu / stainless technical resources’s.
02What is the chemical composition of 304?: C ≤ 0.07, Si ≤ 0.75, Mn ≤ 2, P ≤ 0.045, S ≤ 0.03, Cr 17.5–19.5, Ni 8–10.5, N ≤ 0.1, in mass %, to ASTM A240. An element the standard sets no requirement for is left blank here rather than written as zero.
03What are the mechanical properties of 304?: Tensile ≥ 515 MPa, Yield ≥ 205 MPa, Elongation min ≥ 40 % — ASTM A240, Plate/Sheet/Strip, Annealed. Those are the standard’s requirements; the mill test certificate governs the metal delivered.
04What is 304 used for?: Food, architectural, process equipment, general fabrication