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Q235B, Q195, and Q345B hot rolled carbon steel coils are general-purpose structural and low-carbon steel coils produced by hot rolling at temperatures above the recrystallization point. They are supplied in coil form with a mill scale surface, and are widely used in construction, manufacturing, cold forming, and general engineering applications.
These three grades cover the most common requirements in the market: Q195 for excellent cold formability, Q235B for balanced strength and weldability, and Q345B for higher strength structural applications. All grades are available in a wide range of thicknesses and widths, with optional pickling and oiling for surface-critical applications.
Grade Overview
Grade
Type
Standard
Tensile Strength (MPa)
Yield Strength (MPa)
Key Characteristics
Q195
Carbon Structural Steel
GB/T 912
315–430
≥195
Excellent cold formability, good weldability
Q235B
Carbon Structural Steel
GB/T 912
370–500
≥235
Balanced strength & ductility, most widely used
Q345B
Low Alloy High Strength Steel
GB/T 1591
470–630
≥345
Higher strength, good toughness, weldable
Note: Q345B corresponds to Q355B under the updated GB/T 1591-2018 standard. Both designations are commonly searched and accepted.
International Grade Equivalents
Chinese Grade
JIS
ASTM
DIN / EN
Application Match
Q195
SPHC / SPHD
SAE1006 / 1008
St12 / DC01
Cold forming, stamping
Q235B
SS400
A36
S235JR
General structure, welding
Q345B
SM490
A572 Gr.50
S355JR
Heavy structure, load-bearing
Available Specifications
Parameter
Range
Thickness
1.0mm – 25mm
Width
600mm – 2000mm (or customized)
Coil ID
508mm / 610mm
Coil Weight
3–25 tons (or customized)
Surface
Mill scale / pickled & oiled / dry
Supply Condition
Hot rolled, pickled, annealed (optional)
Standard
GB/T 912, GB/T 1591, JIS G3101, ASTM A36, EN 10025
Key Features
Excellent Weldability — Low carbon content ensures good weldability for all three grades
Good Cold Forming Performance — Q195 and Q235B are particularly suitable for bending, stamping, and roll forming
High Strength — Q345B offers significantly higher yield strength for load-bearing structures
Consistent Quality — Strict process control ensures uniform mechanical properties and dimensional accuracy
Versatile Surface Options — Mill finish, pickled & oiled, or dry according to customer requirements
Cost-Effective — Hot rolled coils offer an economical solution for large-volume applications
Reliable Quality — Stable chemical composition and mechanical properties, batch after batch
Fast Delivery — Large inventory and efficient logistics for prompt shipment
Order Information
MOQ: 25 tons (negotiable)
Payment Terms: T/T, L/C at sight
Delivery Time: 7–20 days after deposit
Packaging: Standard export seaworthy packing — steel strips, waterproof paper, and steel pallets
Port of Loading: Tianjin / Qingdao / Shanghai (or as required)
For inquiries, please specify: grade, thickness, width, coil weight, quantity, surface requirement, and destination port.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Agent,Exporter,Trading Company
Year Established:
2009
Total Annual:
200000000-230000000
Employee Number:
150~170
Ecer Certification:
Verified Supplier
Shandong Shouya Steel Co., Ltd.
Welcome to Shandong Shouya Steel Co., Ltd., a professional steel foreign trade and steel solution provider based in Shandong, China. Founded in 2009, we leverage Shandong’s steel industrial cluster advantages and boast more than ten years of experience in...
Shandong Shouya Steel Co., Ltd.
Welcome to Shandong Shouya Steel Co., Ltd., a professional steel foreign trade and steel solution provider based in Shandong, China. Founded in 2009, we leverage Shandong’s steel industrial cluster advantages and boast more than ten years of experience in...