Q235 Q235B Steel Round Bar Q235 Q235B High Quality Carbon Structure Steel Round Bar/Rod

• Type: Carbon Steel Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Ferrous Steel Scrap
• Technique: Hot Rolled
• Shape: Bar
• Surface Treatment: Black
• Model NO.: Round bar
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Die Steel Bar
• Transport Package: Wooden
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7211230000

Product Description

Material

Q235 Steel (Q235A Q235B Q235C Q235D)
Q235 steel is a plain carbon structural steel which is widely used in China. Q235 material in Chinese standard GB/T 700 is divided into 4 quality grades: Q235A, Q235B, Q235C and Q235D; Density of this steel is 7.85 g/cm3 (0.284 lb/in3), tensile strength is 370-500 MPa (54-73 ksi); yield strength is 235 MPa (34 ksi) for steel bar diameter or plate thickness ≤ 16mm. Since it is mild steel, the material is commonly used directly without heat treatment. Q235 material has moderate strength, in the case of higher strength requirements, Q275 or high-strength low alloy structural steel Q355 (former Q345) can be selected.

Comparative standards:Q235 Steel (Q235A Q235B Q235C Q235D)

Carbon structural steel. (Q235A Q235B Q235C Q235D)
 Chemical composition

Steel Grade	C	Si	Mn	P	S	Cr	Mo	W	Ni	V
Q235A	Max0.22	Max0.35	Max1.40	Max0.045	Max0.050					-
Q235B	Max0.20	Max0.35	Max1.40	Max0.045	Max0.045
Q235C	Max0.17	Max0.35	Max1.40	Max0.040	Max0.040
Q235D	Max0.17	Max0.35	Max1.40	Max0.035	Max0.035

Grade Q235 tool steel Specification

Tool steel Q235 Steel (Q235A Q235B Q235C Q235D) steel round bars size range

Grade	Material Q235	Hot rolled size range:Dia16mm-45mm
		Forged size range:Dia50mm-380mm
Max dia	380mm	EFS size range:Dia16mm-260mm
Min dia	16mm	ESR size range:Dia16mm-380mm

Tool steel Q235steel plates size range

Grade	Material Q235	Hot rolled size range:thickness 15mm-40mm
		Width: max 610mm
Min thickness	15mm	Forged size range:thickness 45mm-300mm
Max thickness	300mm	Width: max 700mm
		EFS size range:thickness 15mm-230mm
Min width	105	Width:max650mm
Max width	700mm	ESR size range:thickness:15mm-300mm
		Width:max 700mm

Tool steel Q235 steel square bars size range

Grade	Material Q235	Hot rolled size range:max45mm
		Forged size range:50mm-320mm
Max square	320mm	EFS size range: max square 170mm
		ESR size range: max square 320mm

Q235 steel Length:

2000mm-5800mm Straightness: 2mm/M max;

Tool steel Q235 Process

EAF + LF + VD +(ESR) + Forged + Heat Treatment (optional)
Melting process: electric arc furnace, ladle furnace, vacuum degassing
Re-smelting process: Electroslag re-smelting
Casting process: ingot casting

Q235 steel Delivery condition

Hot forged/Hot Rolled +Rough machined (black surface )+ Turned (optional)or milled in four face (flat bars or steel plates)

Delivery Time

20 days

Q235 MOQ

3 tons

Q235 Physical Properties

Notes:

• 10-6·K-1 = 10-6/K
• 1 Ω·mm²/m = 1 μΩ·m
• 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
• 1 GPa = 1 kN/mm2
• 1 MPa = 1 N/mm2

Physical Properties
Density, g/cm3 (lb/in3)	7.85 (0.284)
Melting point, °C (°F)	1450-1530 (2640-2800)
Specific heat capacity, J/(Kg·K)	470 at 20 °C (68 °F)
Electrical resistivity, μΩ·m	about 0.15 (20 °C)
Elastic modulus, GPa (ksi)	200 (29 x 103)
Thermal conductivity, (W/m·K)	53-49 (0-100 °C)
Coefficient of thermal expansion, (10-6/K)	11.3-11.6 at 20-100 °C (68-212 °F)
Young's modulus, GPa (ksi)	200 (29 x 103)
Poisson's ratio	0.24-0.28

Tool steel Q235 Forged ratio

no less than 4:1

Q235 steel Technical Data

According to the customer's requirement of Chemical Composition,
Physical Properties and Mechanical Testing

Q235 steel Test

Test and inspection: 100% mixed test
100% crack test, defect depth max.1% of diameter(turned, peeled) or width
100% US test acc. to SEP standard. Ultrasonic test according to SEP 1921-84 G3 C/c;SEP 1921-84 D/d(optional)

Certificate of Quality of Q235 tool steel

in addition the normal terms, production process, the mechanical property, forged ratio, UT test result, Grain size,
heat treatment methods and the sample of is shown on the Certificate of Quality

Q235 tool steel Marking

Grade, heat NO. length will be stamped one each bar with required color

Payment

30% advance by T\T; Balance pay before the shipment against shipping documents or irrevocable LC at sight

Grade Q235 steel Application

Q235 steel has good plasticity, toughness and weldability, as well as a moderate strength, good cold bending performance. Q235 material is commonly rolled into wire rod or round steel, square steel, flat steel, angle steel, I beam, channel steel, other sections and steel plates. These products are widely used in construction and engineering welded structures, to make steel bars or build factory buildings, high voltage transmission towers, bridges, vehicles, boilers, containers, etc., and also used as a mechanical part with less demanding performance such as less stressed rods, connecting rods, screws, nuts, ferrules, brackets, and stands, etc.