Name: 304 Stainless Steel Coil
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304 Stainless Steel Coil

304 stainless steel coil is the most versatile and widely used austenitic chromium-nickel stainless steel, supplied in continuous coil form for efficient manufacturing. It offers an excellent combination of corrosion resistance, formability, and weldability, making it suitable for a wide range of applications across various industries.

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◉ PRODUCT SPECIFICATION

1. Standard Designations

UNS: S30400
ASTM: A240/A240M
EURONORM: 1.4301
JIS: SUS 304
GB/T: 06Cr19Ni10

2. Chemical Composition (% by weight)

Element	C	Si	Mn	P	S	Cr	Ni
Min	-	-	-	-	-	18.0	8.0
Max	0.07	0.75	2.00	0.045	0.030	20.0	10.5

3. Mechanical Properties (Annealed Condition)

Property	Yield Strength	Tensile Strength	Elongation	Hardness
Value	≥205 MPa	≥515 MPa	≥40%	≤201 HB

4. Corrosion Resistance

General Corrosion: Excellent resistance to atmospheric corrosion and most oxidizing acids
Pitting Resistance: Good resistance in mild corrosive environments
Intergranular Corrosion: May be susceptible in welded condition without proper heat treatment
PREN Value: ~19

5. Physical Properties

Property	Value
Density	8.0 g/cm³
Melting Range	1399-1454°C
Thermal Conductivity	16.2 W/m·K (100°C)
Thermal Expansion	17.2 × 10⁻⁶/K (20-100°C)
Modulus of Elasticity	193 GPa

6. Available Product Range (Coil)

Parameter	Specification
Thickness	0.3mm - 6.0mm
Width	600mm - 2000mm
Coil ID	508mm / 610mm
Coil OD	1000mm - 1500mm
Temper	Annealed, 1/4H, 1/2H, 3/4H, Full Hard

7. Surface Finishes

2B: Standard smooth matte finish (most common)
BA: Bright annealed mirror finish
No. 4: Brushed/satin finish
2D: Dull matte finish
No. 8: Mirror polish

8. Typical Applications

Food processing equipment
Kitchen appliances and utensils
Architectural panels and trim
Chemical equipment
Automotive exhaust systems
Pharmaceutical equipment
Decorative products

◉ 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