Name: Hot Rolled Stainless Steel Coil
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Hot Rolled Stainless Steel Coil

Hot Rolled Stainless Steel Coil is manufactured by rolling stainless steel slabs at high temperatures (typically above 1000°C), followed by annealing and pickling processes. This production method results in a characteristic scaled surface finish and allows for the manufacture of thicker gauges with excellent mechanical properties and cost-effectiveness compared to cold-rolled alternatives.

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◉ PRODUCT SPECIFICATION

1. Standard Designations

ASTM: A480/A480M (General Requirements)
ASTM: A240/A240M (Specific Grades)
EN 10088-2: European Standard
JIS G 4304: Japanese Industrial Standard
GB/T 4237: Chinese National Standard

2. Common Grades & Chemical Composition (% by weight)

Grade	C	Si	Mn	P	S	Cr	Ni	Other
304	≤0.07	≤0.75	≤2.00	≤0.045	≤0.030	18.0-20.0	8.0-10.5	-
304L	≤0.030	≤0.75	≤2.00	≤0.045	≤0.030	18.0-20.0	8.0-12.0	-
316	≤0.07	≤0.75	≤2.00	≤0.045	≤0.030	16.0-18.0	10.0-14.0	Mo:2.0-3.0
316L	≤0.030	≤0.75	≤2.00	≤0.045	≤0.030	16.0-18.0	10.0-14.0	Mo:2.0-3.0
321	≤0.08	≤0.75	≤2.00	≤0.045	≤0.030	17.0-19.0	9.0-12.0	Ti:≥5×C%
430	≤0.12	≤0.75	≤1.00	≤0.040	≤0.030	16.0-18.0	-	-

3. Mechanical Properties (Annealed Condition)

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Hardness (HB)
304	≥205	≥515	≥40	≤201
304L	≥170	≥485	≥40	≤201
316	≥205	≥515	≥40	≤217
316L	≥170	≥485	≥40	≤217
321	≥205	≥515	≥40	≤217
430	≥205	≥450	≥22	≤183

4. Physical Properties (Typical for Austenitic Grades)

Density: 7.9-8.0 g/cm³
Melting Point: 1400-1450°C
Thermal Conductivity: 16-21 W/m·K at 100°C
Coefficient of Thermal Expansion: 17-18 × 10⁻⁶/K (20-100°C)
Modulus of Elasticity: 193-200 GPa

5. Available Product Range

Parameter	Specification Range
Thickness	2.0mm - 20.0mm
Width	800mm - 2000mm
Coil ID	508mm / 610mm / 760mm
Coil OD	1000mm - 2000mm
Coil Weight	5-25 tons

6. Surface Finishes

No. 1: Hot-rolled, annealed and pickled surface - characteristic dull, matte finish
No. 1D: Hot-rolled, annealed and pickled, with a smoother surface than No. 1
No. 1E: Hot-rolled, annealed and pickled, with a controlled roughness surface

7. Typical Applications

Pressure vessels and boilers
Chemical processing equipment
Structural components
Industrial machinery parts
Heat exchangers
Automotive frames and chassis
Construction materials

◉ 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

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