Stainless Steel Plate

GNEE offers a comprehensive range of stainless steel sheets in various specifications, catering to diverse requirements ranging from industrial manufacturing to architectural decoration:
By Processing Method: Hot-rolled sheets (No.1), Cold-rolled sheets (2B/BA).
By Material Grade:
Austenitic: 304, 304L, 316, 316L, 310S, 321, etc.
Ferritic/Martensitic: 410, 420, 430, 440, etc.
Duplex Stainless Steel: 2205, 2507, S31803.
Super Stainless Steel: 904L, 254SMO, Hastelloy, etc.
By Surface Finish: Mirror (8K), Brushed (HL/No.4), Sandblasted, Etched, Embossed, PVD Color Coating (Gold, Black, Rose Gold, etc.).
Special Forms: Medium-to-thick plates, Patterned plates (Anti-slip/Tread plates), Perforated plates, Precision steel strips, Custom-cut parts.

The following are the equivalent grades of our stainless steel plates.

Series	ASTM/AISI Grade	UNS Code	EN/DIN Standard	JIS Grade
Austenitic	304	S30400	1.4301	SUS304
	304L	S30403	1.4307	SUS304L
	316	S31600	1.4401	SUS316
	316L	S31603	1.4404	SUS316L
	321	S32100	1.4541	SUS321
	310S	S31008	1.4845	SUS310S
Ferritic	430	S43000	1.4016	SUS430
	409L	S40903	1.4512	SUS409L
Martensitic	410	S41000	1.4006	SUS410
	420	S42000	1.4021	SUS420
Duplex	2205	S32205	1.4462	SUS32205
	2507	S32750	1.4410	SUS32750
Super Alloy	904L	N08904	1.4539	SUS890L

 

Stainless steel plate production involves melting raw materials (iron, chromium, nickel) in an electric arc furnace, casting them into slabs, hot rolling to reduce thickness, and finishing through annealing and pickling to remove scale. Further cold rolling and surface polishing are used for precise, high-finish plates.

 

The thickness tolerance of stainless steel plates is typically allowed within the range of 0.05 mm to +5 mm (0.002 in – 0.02 in), depending on the specification, grade, and standards such as ASTM A240 or EN 10259. Thinner sheets (e.g., 20 gauge) have tighter tolerances (around +0.002 in), while thicker plates (e.g., 7 gauge) allow larger deviations (up to about +0.007 in).

 

Thickness Tolerances for Cold Rolled Stainless Steel Sheets

Standard: Based on ASTM A480
Applicable to: 2B, BA, No.4, HL finishes

Specified Thickness (mm)	Tolerance for Width ≤ 1250mm (mm)	Tolerance for Width 1250-1500mm (mm)	Precision Tolerance (Optional)
0.30 - 0.60	± 0.03	± 0.04	± 0.02
0.61 - 1.00	± 0.04	± 0.05	± 0.03
1.01 - 1.50	± 0.05	± 0.06	± 0.04
1.51 - 2.00	± 0.06	± 0.08	± 0.05
2.01 - 3.00	± 0.08	± 0.10	± 0.07
3.01 - 4.00	± 0.12	± 0.15	± 0.10
4.01 - 6.00	± 0.15	± 0.18	± 0.13

 

Thickness Tolerances for Hot Rolled Stainless Steel Plates

Standard: Based on ASTM A480/A240
Applicable to: No.1 Finish

Specified Thickness (mm)	Tolerance Over (mm)	Tolerance Under (mm)	Typical Application
3.00 - 4.75	0.40	0.30	Light Industrial Tanks
4.76 - 9.50	0.50	0.30	Chemical Processing
9.51 - 15.00	0.60	0.30	Structural Support
15.01 - 25.00	0.75	0.30	Pressure Vessels
25.01 - 50.00	1.00	0.30	Heavy Machinery
> 50.00	1.50	0.30	Marine Engineering

 

If you would like to view more detailed Thickness tolerances for stainless steel plates, click below to access the ASTM A480 technical document.

ASTM A480.PDF

 

 

Stainless steel plates are usually calculated by using the following formula:

Weight Calculation Formula：

Weight=Length×Width×Thickness×Density

For stainless steel, the common density is:

304 / 316 stainless steel ≈ 7.93 g/cm³ (or 7930 kg/m³)
Metric Calculation Formula

Weight (kg)=L(m)×W(m)×T(mm)×7.93

Where:

L = Length (m)
W = Width (m)
T = Thickness (mm)
Example

For a stainless steel plate:

Length = 2 m
Width = 1 m
Thickness = 3 mm

The calculation is:

2 × 1 × 3 × 7.93 = 47.58 kg

This method is commonly used for calculating the theoretical weight of 304, 316, 316L, and other stainless steel plates.

 

Finish	Name	Description	Common Uses
No.1	Hot Rolled	Annealed and pickled. Silver-white, dull finish.	Chemical tanks, industrial plants.
2B	Cold Rolled	Bright, smooth, and moderate reflectivity.	Medical tools, food equipment, construction.
BA	Bright Annealed	Mirror-like brightness, very smooth.	Home appliances, mirrors, decorative trim.
No.4/HL	Brushed/Hairline	Fine abrasive lines, non-reflective.	Elevators, kitchen backsplashes, handrails.
8K	Mirror	Highly reflective, distorted-free image.	Luxury decoration, architectural façades.
Embossed	Textured	Raised patterns (teardrop, diamond, etc.).	Anti-slip floors, elevator interiors.

 

 

 

 

As a leading supplier of stainless steel plates, GNEE is dedicated to providing high-quality material solutions to customers worldwide. We maintain extensive, year-round inventory covering a full range of grades, including the 300 and 400 series as well as duplex stainless steel.

In terms of processing precision, GNEE has introduced industry-leading equipment, including 12,000W ultra-high-power laser cutting machines, precision five-stand cold rolling production lines, and fully automatic CNC leveling machines. Our processing tolerance can be accurately controlled within ±0.05 mm. We have also established a strict quality inspection laboratory, where every batch of products is certified by ISO 9001, CE, and SGS, and supplied with complete original MTC material certificates.

We guarantee shipment of regular stock products within 3–5 days, while customized processing solutions can be delivered within 10–15 days. Currently, GNEE’s service network covers more than 60 countries worldwide, making us your trusted strategic partner in the construction, chemical, and food machinery industries.

 GNEE Stainless Steel Plate Inventory Showcase

 

 

1. PMI Spectral Analysis (Positive Material Identification)

Method:Using a handheld XRF spectrometer or an optical emission spectrometer (OES).

Purpose:To quickly determine the content of elements such as Chromium (Cr), Nickel (Ni), Molybdenum (Mo), and Manganese (Mn).
For example, distinguishing between 304 and 316L stainless steel, as 316L must contain more than 2% molybdenum.

 

2. Mechanical Properties Testing

This testing evaluates the performance of stainless steel plates during loading, processing, and stamping operations.

Tensile Test: Measures yield strength, tensile strength, and elongation to ensure the plate will not crack or permanently deform during structural applications.

Hardness Test: Determines the hardness level of the stainless steel plate.

Bending Test: The plate is bent to a specified angle to observe whether cracks appear in the bending area.

 

3. Dimensional & Tolerance Inspection

Thickness Tolerance Inspection: Measured using a digital micrometer.

Flatness Inspection: Checked using a straightedge ruler or laser flatness measuring instrument.

Diagonal Measurement: Measures whether the plate dimensions are square and proportional, preventing poor joint fitting caused by “diamond-shaped” plates.

 

Every batch of stainless steel plates undergoes a rigorous series of evaluations—including PMI chemical composition analysis, mechanical tensile strength testing, and salt spray corrosion testing—to ensure that the materials you receive fully meet your project's specific requirements. All products are delivered accompanied by a Mill Test Certificate (MTC), version 3.1B, in compliance with the EN 10204 standard.

For sheets intended for various applications, we provide precise surface protection solutions:
Standard Protective Film: We offer single-layer or double-layer PE/PVC protective films ranging from 70μm to 100μm in thickness to prevent scratches during processing and installation.
Paper Interleaving: For 8K mirror-finish sheets or ultra-thin precision sheets, neutral moisture-proof paper is inserted between the sheets to prevent adhesion and surface abrasion.

Structural Support & Bundling
Ensuring cargo remains stable and free from deformation during hoisting and container shipping:
Fumigation-Free Wooden Pallets: Compliant with the international ISPM 15 standard, ensuring hassle-free customs clearance for exports.
Robust Steel Frame Support: For exceptionally heavy or oversized sheets, we provide custom-welded steel frame pallets to ensure maximum load-bearing capacity.

 Marking
Clear Shipping Marks: Each package features waterproof shipping labels clearly indicating the material grade, heat number, dimensions, net/gross weight, and a "Made in China" label.
One Package, One Certificate: A laminated copy of the MTC (Material Test Certificate) is included inside every package.

 

 

Stainless steel plate value-added processing services include laser cutting, bending, welding, polishing, slitting, drilling, and surface finishing. Advanced CNC equipment can achieve cutting tolerances within ±0.05 mm and surface roughness as low as Ra 0.4 μm.

 

 

 

 

We're professional stainless steel plate manufacturers and suppliers in China, specialized in providing high quality customized service. Be free to wholesale stainless steel plate in stock here and get free sample from our factory. For price consultation, contact us.

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