CARBON STEEL · CHECKER PLATE Q235B Steel Floor PlateGB/T 33974 Diamond Checker / Tread Plate Raised diamond pattern for maximum anti-slip grip — the standard choice for stair treads, platforms, walkways and vehicle flooring. STANDARD: GB/T 33974 PATTERN: DIAMOND THICKNESS 3–8 mm YIELD STRENGTH≥235 MPa TENSILE STRENGTH370–500 MPa PATTERN HEIGHT1.0–2.5 mm 01 · PRODUCT OVERVIEW Q235B checker plates carry a raised diamond pattern rolled directly into a hot-rolled carbon steel base. The pattern provides dependable anti-slip friction even when wet, oily or dusty, while the Q235B base keeps full structural strength for load-bearing floors and steps. WHY CHOOSE Q235B CHECKER One material, one grade — Q235B only. Uniform diamond pattern, consistent base thickness, weldable and cuttable, with mill certificates on…
Raised diamond pattern for maximum anti-slip grip — the standard choice for stair treads, platforms, walkways and vehicle flooring.
STANDARD: GB/T 33974PATTERN: DIAMONDTHICKNESS 3–8 mm
YIELD STRENGTH
≥235 MPa
TENSILE STRENGTH
370–500 MPa
PATTERN HEIGHT
1.0–2.5 mm
01 · PRODUCT OVERVIEW
Q235B checker plates carry a raised diamond pattern rolled directly into a hot-rolled carbon steel base. The pattern provides dependable anti-slip friction even when wet, oily or dusty, while the Q235B base keeps full structural strength for load-bearing floors and steps.
WHY CHOOSE Q235B CHECKER
One material, one grade — Q235B only. Uniform diamond pattern, consistent base thickness, weldable and cuttable, with mill certificates on every batch.
02 · KEY FEATURES
Anti-Slip Grip
Raised diamond points grip footwear and tyres in wet, oily and dusty conditions.
Full Structural Strength
Q235B base keeps full yield and tensile strength for load-bearing floors and stairs.
Easy Fabrication
Cuts cleanly with plasma, laser or shear; welds and bends without special treatment.
Long Service Life
Hot-rolled surface and optional painting or galvanizing extend life in outdoor and industrial use.
Standard Stock Sizes
3/4/5/6/8 mm base in 1000/1250/1500 mm widths, 6000 mm lengths ready to cut.
Custom Cutting
Treads, gussets and panels cut to drawing — ready for installation on arrival.
03 · CHEMICAL COMPOSITION (Cast Analysis, %) — Q235B
Élément
C
Et
Mn
P.
S
Max Content
0.20
0.35
1.40
0.045
0.045
Note: Values are maximum cast analysis in percent. Mill test certificates accompany each batch.
04 · MECHANICAL PROPERTIES (Base Plate)
Propriété
Valeur
Test Method
Limite d'élasticité (ReH)
≥ 235 MPa
GB/T 228.1
Résistance à la traction (Rm)
370 – 500 MPa
GB/T 228.1
Élongation (UN)
≥ 26 %
GB/T 228.1
Charpy Impact (20 °C)
≥ 27 J
GB/T 229
Pattern Height
1.0 – 2.5 mm (diamond)
GB/T 33974
TENSILE STRENGTH — COMMON GRADES COMPARISON
Q235B Checker (370–500 MPa)RANGE
Q355B (470–630 MPa)HIGHER
05 · PHYSICAL PROPERTIES
DENSITY
7.85 g/cm³
MELTING POINT
≈ 1510 °C
MODULUS OF ELASTICITY
200 – 210 GPa
POISSON’S RATIO
0.3
06 · COMMON SPECIFICATIONS
Base Thickness (mm)
Pattern Height (mm)
Largeur (mm)
Longueur (mm)
3.0
1.0
1000 / 1250 / 1500
2000 / 3000 / 6000
4.0
1.0
1000 / 1250 / 1500
2000 / 3000 / 6000
5.0
1.5
1000 / 1250 / 1500
2000 / 3000 / 6000
6.0
1.5
1250 / 1500
6000
8.0
2.0
1500 / 1800
6000
Surface
Hot-rolled mill finish; painted, oiled or galvanized on request
Custom size, hole punching and cut-to-shape service available — send your drawing for a quote.
07 · APPLICATIONS
Stair treads & step plates
Factory floors & machine platforms
Walkways, gangways & rampes
Truck beds & trailer flooring
Ship decks & offshore platforms
Anti-slip covers & gantry walk plates
08 · PROCESSING & PACKAGING
Laser / plasma cutting, shearing, perforation, bending and painting available. Plates packed on pallets with protective film or paper interlayers, steel-banded for export.
DELIVERY
Sea, rail or truck freight worldwide, full export documentation (CI, PL, CO, MTC) and loading supervision provided.
Need checker plate cut to your tread size?
Send thickness, largeur, length and pattern — we will confirm stock and price within 24 hours.
PROGRÈS
