Introduction

SS400 carbon steel plate is a general-purpose structural carbon steel plate manufactured in accordance with the Japanese Industrial Standard (JIS) G3101; it is widely utilized in industries such as structural fabrication, engineering machinery, and construction.

Advantage

Cost Advantage

Provides adequate strength for general structural applications at a lower cost than high-strength alloys.

Ease of Processing

Can be cut, bent, drilled, and welded with standard equipment without special treatment.

High Versatility

Highly adaptable, it is suitable for use in construction, machinery, shipbuilding, and general industrial structural components.

Specification

Item	Specification / Typical Data
Standard	JIS G 3101 (Equivalent to Chinese GB/T 700 Q235)
Thickness Range	1.5mm ~ 200mm
Width Range	1000mm ~ 2500mm (or as rolled)
Length Range	3000mm ~ 12000mm (or as rolled)
Surface Condition	Hot-rolled (HR), with mill scale. Blasted or pickled surface available upon request.
Yield Strength	245 MPa min
Tensile Strength	400 - 510 MPa
Elongation	17% min (for thickness ≤16mm)

Typical Chemical Composition (Max. %)

Element	Composition Range
Carbon (C)	0.050 max
Manganese (Mn)	N/A (not specified)
Phosphorus (P)	0.050 max
Sulfur (S)	0.050 max

Applications

Construction and Infrastructure

Transportation

Shipbuilding

Customization Services

Service	Options
Cutting	Plasma, flame, or as specified
Surface	Shot blasting, pickling, primer coating
Packaging	Wooden crates, steel strapping, protective coating
Sizes	Custom thickness, width, length

Why Partner with Us

Reliable Quality

ISO-certified processes and partnerships with leading steel mills guarantee consistent material quality.

Large Inventory

An extensive stock of plates, pipes, and rods enables fast order fulfillment.

Custom Processing & OEM

Advanced machining centers provide cutting, bending, CNC machining, welding, and branding in accordance with customer specifications.

Rapid Customer Response

Professional 24/7 service ensures quick responses to technical and logistics inquiries.

Our certificates

Feedback

We maintain active communication with our clients, providing technical feedback and adjusting production based on project requirements to ensure accurate and timely delivery.

Customer Reviews

FAQ

Q: Can SS400 plates be welded?

A: Yes, SS400 has low carbon content and excellent weldability, suitable for standard welding methods without special pre- or post-treatment.

Q: Can SS400 be left unpainted outdoors?

A: It is not corrosion-resistant; for outdoor use, painting or surface protection is recommended to prevent rust.

Q: Do you give out material certificates?

A: Sure. You'll get a Mill Test Certificate (MTC) with each order that fits EN 10204 3.1. It has the real chemical stuff and test results for the plates.

Q: How long does delivery usually take?

A: If we have the size you need, we can ship in about a week or two. If it's a weird size or a big order, we'll give you a solid time frame when you confirm. It's usually around 3 to 5 weeks.

Q: Can you provide surface preparation or cutting services?

A: Yes, we offer shot blasting, pickling, primer coating, and precision cutting according to project requirements.

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SS400 Carbon Steel Plate