Stainless Steel Alloy 304

Stainless Steel Alloy 304

General Characteristics
Type 304 (S30400) is a variation of the basic 18-8 grade, Type 302, with a higher chromium and lower carbon content. Lower carbon minimizes chromium carbide precipitation due to welding and its susceptibility to inter-granular corrosion. In many instances, it can be used in the ”as-welded“ condition, while type 302 must be annealed in order to retain adequate corrosion resistance.

Type 304L (S30403) is an extra low-carbon variation of Type 304 with a 0.03% maximum carbon content that eliminates carbide precipitation due to welding. As a result, this alloy can be used in the ”as-welded“ condition, even in severe corrosive conditions. It often eliminates the necessity of annealing weldments except for applications specifying stress relief. It has slightly lower mechanical properties than Type 304.

Typical uses include architectural mouldings and trim, kitchen equipment, welded components of chemical, textile, paper, pharmaceutical and chemical industry processing equipment.
Typical Chemical Composition ( 304 / 304L )

Weight % C Mn Si Cr Ni P S Se Fe

minimum — — — 18.00 8.00 — — 0.15 Remainder

maximum 0.08 (304) 0.03 (304L) 2.00 1.00 20.00 10.50 (304) 12.00 (304L) 0.045 0.03 —

Physical Properties (Annealed condition)

Characteristics		English	Metric
Nominal density (68°F/20°C)		0.29 lbs/in³	8.00 g/cm³
Melting range		2550°F-2650°F	1400°C-1450°C
Specific heat (212 °F/100°C)		0.12 BTU/lb – °F	500 J/KG- °K
Coefficient of thermal expansion	32°F – 212°F 0°C – 100°C	9.6 micro in/in- °F	17.2 micro m/m- °K
	32°F – 600°F 0°C – 315°C	9.9 micro in/in- °F	17.8 micro m/m- °K
	32°F–1000°F 0°C–538°C	10.2 micro in/in- °F	18.4 micro m/m- °K
Thermal conductivity	100°C	9.4 BTU/ft- hr – °F	16.2 W/m – °K
Thermal conductivity	500°C	12.4 BTU/ft- hr – °F	21.5 W/m – °K
Electrical properties	Electrical resistivity	720 nΩ ∙ m
Electrical properties	Magnetic parambility	1.02

Mechanical Properties

Condition Tensile Reduction

Ultimate Yield Elongation Of area

KSI MPa KSI MPa Lo %

Annealed 75 515 30 205 35 50

Cold finished 90 620 45 310 30 40
Specifications
- AMS – 5640
- ASTM – A313, A368, A478, A493, A580, A666, A1022
Request quote Print

Stainless Steel Alloy 304 Sales:+972 4 618 2000

General Characteristics
Type 304 (S30400) is a variation of the basic 18-8 grade, Type 302, with a higher chromium and lower carbon content. Lower carbon minimizes chromium carbide precipitation due to welding and its susceptibility to inter-granular corrosion. In many instances, it can be used in the ”as-welded“ condition, while type 302 must be annealed in order to retain adequate corrosion resistance.

Type 304L (S30403) is an extra low-carbon variation of Type 304 with a 0.03% maximum carbon content that eliminates carbide precipitation due to welding. As a result, this alloy can be used in the ”as-welded“ condition, even in severe corrosive conditions. It often eliminates the necessity of annealing weldments except for applications specifying stress relief. It has slightly lower mechanical properties than Type 304.

Typical uses include architectural mouldings and trim, kitchen equipment, welded components of chemical, textile, paper, pharmaceutical and chemical industry processing equipment.
Typical Chemical Composition ( 304 / 304L )

Weight % C Mn Si Cr Ni P S Se Fe

minimum — — — 18.00 8.00 — — 0.15 Remainder

maximum 0.08 (304) 0.03 (304L) 2.00 1.00 20.00 10.50 (304) 12.00 (304L) 0.045 0.03 —

Physical Properties (Annealed condition)

Characteristics		English	Metric
Nominal density (68°F/20°C)		0.29 lbs/in³	8.00 g/cm³
Melting range		2550°F-2650°F	1400°C-1450°C
Specific heat (212 °F/100°C)		0.12 BTU/lb – °F	500 J/KG- °K
Coefficient of thermal expansion	32°F – 212°F 0°C – 100°C	9.6 micro in/in- °F	17.2 micro m/m- °K
	32°F – 600°F 0°C – 315°C	9.9 micro in/in- °F	17.8 micro m/m- °K
	32°F–1000°F 0°C–538°C	10.2 micro in/in- °F	18.4 micro m/m- °K
Thermal conductivity	100°C	9.4 BTU/ft- hr – °F	16.2 W/m – °K
Thermal conductivity	500°C	12.4 BTU/ft- hr – °F	21.5 W/m – °K
Electrical properties	Electrical resistivity	720 nΩ ∙ m
Electrical properties	Magnetic parambility	1.02

Mechanical Properties

Condition Tensile Reduction

Ultimate Yield Elongation Of area

KSI MPa KSI MPa Lo %

Annealed 75 515 30 205 35 50

Cold finished 90 620 45 310 30 40
Specifications
- AMS – 5640
- ASTM – A313, A368, A478, A493, A580, A666, A1022

View full Quality Metals catalogue

BROWSE CATALOGUE

BTI is proud to be the exclusive representative of in Israel, the leading company for Modular Profile solutions and related products