Name: 304L Stainless Steel Plate
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304L Stainless Steel Plate

304L is the low-carbon version of the classic 304 stainless steel. The reduced carbon content (≤0.030%) minimizes the precipitation of chromium carbides during welding and exposure to high temperatures. This imparts superior resistance to intergranular corrosion, making it an ideal choice for heavy-gauge welded components and applications in corrosive environments where welding is required, without the need for post-weld annealing.

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◉ PRODUCT SPECIFICATION

1. Product Overview

Cold Rolled Stainless Steel Plate
Size	Coil	Thickness 0.1mm-3mm,Width can be customized
	Plate	Thickness 0.1mm-3mm,Width and Length can be customized
Hot Rolled Stainless Steel Plate
Size	Coil	Thickness 2.8mm-14mm, Width can be customized
	Plate	Thickness 2.8mm-20mm,Width and Length can be customized
Finish	2B,2D,BA,NO.1,NO.4,HL,8K

2. Standard Designations

UNS: S30403
ASTM: A240/A240M
EURONORM: 1.4307
JIS: SUS 304L
GB/T: 022Cr19Ni10 (Old designation: 00Cr19Ni10)

3. Chemical Composition (% by weight)

Element	Carbon (C)	Silicon (Si)	Manganese (Mn)	Phosphorus (P)	Sulfur (S)	Chromium (Cr)	Nickel (Ni)	Nitrogen (N)
Min.	-	-	-	-	-	18.00	8.00	-
Max.	0.030	0.75	2.00	0.045	0.030	20.00	12.00	0.10

4. Mechanical Properties (at Room Temperature, for Annealed Condition)

Property	Yield Strength (0.2% Offset)	Tensile Strength	Elongation (in 2")	Hardness (Brinell)	Hardness (Rockwell B)
Value	≥ 170 MPa (25 ksi)	≥ 485 MPa (70 ksi)	≥ 40%	≤ 201 HBW	≤ 92 HRB

(Note: The lower carbon content results in slightly lower yield and tensile strength compared to standard 304.)

5. Physical Properties (Typical)

Identical to 304, as the base composition is similar.

Property	Value
Density	8.00 g/cm³ (0.289 lb/in³)
Melting Range	1400 - 1450 °C (2550 - 2650 °F)
Modulus of Elasticity	193 GPa (28 x 10⁶ psi)
Thermal Conductivity (100°C)	16.2 W/m·K
Coefficient of Thermal Expansion (20-100°C)	17.3 x 10⁻⁶ /K

6. Corrosion Resistance

General Corrosion: Excellent resistance, similar to 304, in a wide range of environments.
Intergranular Corrosion: Significantly superior to 304. The low carbon content prevents harmful chromium carbide formation in the heat-affected zone (HAZ) of welds, making it the preferred choice for welded structures.
Pitting/Corrosion Resistance: Good resistance to mildly corrosive environments. Its Pitting Resistance Equivalent Number (PREN) is ~19, same as 304.

7. Typical Applications

Welded Fabrications: Pressure vessels, tanks, and piping systems for the chemical, petrochemical, and food industries.
Architectural & Marine: Welded structures in environments exposed to corrosive agents.
Heat Exchangers: Especially those involving welding.
Pharmaceutical & Food Processing Equipment: Where sanitization and corrosion resistance are critical.

◉ Surfcae selection

SURFACE	CHARACTERISTIC	SUMMARY OF MANUFACTURING METHOD	APPLICATION
NO.1	Silvery white	Hot rolled to specified thickness	Do not need to have a glossy surface use
NO.1	lackluster	Hot rolled to specified thickness	Do not need to have a glossy surface use
NO.2D	Silvery white	After cold rolling, heat treatment and pickling are carried out	General material, deep material
NO.2B	Gloss is stronger than No.2D	After No.2D treatment, the final light cold rolling is carried out through the polishing roller	The general material
BA	As bright as a sixpence	No standard, but usually a bright annealed surface with high reflectivity.	Building materials, kitchen utensils
NO.3	Rough lapping	Grind with 100~200# (unit) strop tape	Building materials, kitchen utensils
NO.4	Intermediate grinding	Polished surface obtained by grinding with 150~180# strop abrasive tape	Building materials, kitchen utensils
NO.240	Fine lapping	Grinding with 240# strop abrasive tape	kitchenware
NO.320	Very fine grinding	Grinding was carried out with 320# strop abrasive tape	kitchenware
NO.400	The luster is close to BA	Use 400# polishing wheel to grind	General timber, building timber, kitchen appliances
HL	Hairline grinding	Suitable particle material for hair stripe grinding (150~240#) with many grains	Building, construction material
NO.7	It's close to mirror grinding	Use a 600# rotary polishing wheel to grind	For art or decoration
NO.8	Mirror ultrafinish	The mirror is ground with a polishing wheel	Reflector, for decoration