Heavy-Duty Q235B / Q345B Checkered Steel Plates for Anti-Slip Applications

Product Description:

Q235B and Q345B checkered steel plates are hot-rolled carbon steel plates with a raised diamond or tear drop pattern on the surface. This pattern enhances slip resistance, making these plates ideal for use in walkways, loading ramps, trailers, stairs, and ship decks.

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What Is Q235B / Q345B Checkered Steel Plate?

• Q235B is a standard carbon structural steel grade widely used in China. It is similar to ASTM A36 or EN S235JR and provides good strength, weldability, and cost-efficiency.
• Q345B is a low-alloy high-strength structural steel with higher mechanical performance, equivalent to ASTM A572 Gr.50 or EN S355JR.

Both grades are commonly used in anti-slip flooring applications, and the checkered surface helps prevent slipping in wet, oily, or high-traffic areas.

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Key Features

• ✔ Anti-slip pattern: Diamond or tear drop design enhances safety
• ✔ High strength: Q345B offers stronger load-bearing capacity
• ✔ Good weldability and formability
• ✔ Available in galvanized or oiled finishes
• ✔ Cut-to-size customization supported

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Common Applications

• Factory and warehouse flooring
• Vehicle and trailer beds
• Loading ramps and stairs
• Ship and offshore platform decks
• Construction walkways and scaffolding

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Advantages Over Other Materials

Compared to stainless steel tread plates or aluminum, Q235B and Q345B carbon steel plates offer superior strength-to-cost ratio, better impact resistance, and high availability.

Compared with A36 or S235JR, Q345B features:

• Higher yield and tensile strength
• Improved durability in structural applications
• Better suited for heavy-duty industrial use

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Specifications and Standards

Item	Q235B Checkered Plate	Q345B Checkered Plate
Standard	GB/T 700	GB/T 1591
Pattern Type	Diamond / Tear Drop	Diamond / Tear Drop
Thickness	2.0 – 10.0 mm	2.0 – 12.0 mm
Width	1000 – 2000 mm	1000 – 2000 mm
Length	2000 – 12000 mm	2000 – 12000 mm
Finish	Black, Oiled, Galvanized	Black, Oiled, Galvanized
Edge	Mill Edge / Slit Edge	Mill Edge / Slit Edge

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Chemical Composition & Mechanical Properties

📌 Q235B Chemical Composition (%)

Element	Max Content (%)
C (Carbon)	≤ 0.22
Si (Silicon)	≤ 0.35
Mn (Manganese)	≤ 1.40
P (Phosphorus)	≤ 0.045
S (Sulfur)	≤ 0.045

📌 Q235B Mechanical Properties

Property	Value
Yield Strength	≥ 235 MPa
Tensile Strength	375 – 500 MPa
Elongation	≥ 26%

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📌 Q345B Chemical Composition (%)

Element	Max Content (%)
C (Carbon)	≤ 0.20
Si (Silicon)	≤ 0.50
Mn (Manganese)	1.00 – 1.60
P (Phosphorus)	≤ 0.035
S (Sulfur)	≤ 0.035

📌 Q345B Mechanical Properties

Property	Value
Yield Strength	≥ 345 MPa
Tensile Strength	470 – 630 MPa
Elongation	≥ 21%

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Surface Coating & Customization

• Hot-dip galvanized or black surface
• Pickled & oiled option
• Laser cut or plasma cut to exact size
• Custom pallet packaging for export

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Related Grades (for client comparison)

Grade	Region	Equivalent
A36	USA	≈ Q235B
S235JR	EU	≈ Q235B
S355JR	EU	≈ Q345B
ASTM A572 Gr.50	USA	≈ Q345B
SS400	Japan	≈ Q235B

Detailed Photos:

Package & Shipment:

• Type: Standard Seaworthy Packing
• Delivery time: 7-15 Days After We Get The Payment
• Size: Based On Orders
• Packaging Details: As Customer Requirement

Q: What is your company’s main products/services?

A: We are a professional manufacturer for Carbon Steel, Alloy Steel and Profile products. We have the experience of steel business for more than 10 years and our products are exported to Mid East,South America,Southeast Asia,Africa,South and East Asia etc.

Q: Can I go to your factory for a visit?

A: Of course, we welcome customers from all over the world to visit our factory.

Q: What are your terms of payment?

A: 30% T/T deposite and 70% balance before shipment.

Q: What is your delivery time?

A: For stocks,we could transport the goods to loading port within 7 days after we received the deposit; For production,it usually takes about 15-30 days after receiving the deposit.

Q: Do you provide samples? Are they free or paid?

A: Samples are available for free,but the courier freight will be covered by customer account.

Q: Do you accept the third party inspection?

A:Yes, we fully accept ‌third-party inspections.

Q: Why should I buy from you not from other suppliers?

A: Integrating the superior resources of China’s steel industry, we provide customers with high-quality steel products at preferential prices, and can ensure that the goods are delivered to customers in a timely manner.

Q:How can you guarantee quality?

A: Always a pre-production sample before mass production;Always 100% inspected before shipment