Name: Q390 Q420 Q460 Q690 Q690D Carbon Steel Plate
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Q390 Q420 Q460 Q690 Q690D Carbon Steel Plate

Carbon steel plates have many uses and a large amount. They are mainly used in railways, bridges, and various construction projects to manufacture various metal components that bear static loads, and unimportant mechanical parts and general welded parts that do not require heat treatment.

Product Description

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Q390 Q420 Q460 Q690 Q690D Carbon Steel Plate

—Product Description

Carbon steel plates have many uses and a large amount. They are mainly used in railways, bridges, and various construction projects to manufacture various metal components that bear static loads, and unimportant mechanical parts and general welded parts that do not require heat treatment.
Product Name	carbon steel plate/ carbon steel sheet
Technology	Hot rolled ; cold rolled；colled drawn
Thickness	2-400mm
Width	600-2000mm
Length	1-12m or as request
Material	A36,A283,A285,Q195,Q215,Q235, Q345,Q345B,Q345C,Q345D,Q345E,Q390,Q390B,Q390C, Q390D,Q390E,Q420,Q420B,Q420C,Q420D,Q420E,Q460, Q460D,Q500C,Q500D,Q500E,Q550C,Q550D,Q550E,Q620C, Q620D,Q620E,Q690A,Q690B,Q690C,Q690D,Q690E,Q690D, Q690C,Q890C,Q890D;16Mo3,16MnL,16MnR,16Mng,16MnDR ST12,ST13,ST14,ST37,SPCC,SPCD,SPCE,DC01,DC02,DC03, DC04,Sae 1010,S235Jr,Ck75,SS400,r.A,.Gr.B.Gr.C,
Certificate	BV,TUV,ISO 9001:2008/BV
Special Use	High-strength Steel Plate, High-strength Steel Plate
Terms of payment	T/T,L/C
Standard	AISI, ASTM, BS, DIN, GB, JIS
Type	steel plate, Boiler Vessel Plate
Surface Treatment	COATED Top paint: PVDF, HDP, SMP, PE, PU Prime paint: polyurethane, epoxy, PE Back paint: epoxy, modified polyester
Application	Boiler Plate;Building industry ,structural use, roofing, commercial use ,household appliance, industry facilities, office buildings,Container Plate,automobile making, Electrical appliance, Locomotive and car, airlines, precision meter,Canned food packing,roofing sheet, window-shades, car ceiling, the shell of the car, air conditioner, outer shell of water machine, steel structure
Tolerance	±1%
Processing Service	Bending, Welding, Decoiling, Cutting, Punching, Polishing
Place of Origin	China
Model Number	A36,SS400,Q235,etc.
professional services:	provide professional service
Length:	coil cut to length
checker plate specification:	chequered plate 6mm thick
metal roofing sheet design	metal roofing sheet design
Supply Ability	6000 /5000 Ton/Tons per Month
Packaging Details	Waterproof paper, and steel strip packed. Standard Export Seaworthy Package.
payent term	L/C T/T(30% Deposit)
General width	910mm, 1010mm, 1219mm, 1220mm,1250mm,1500mm
Workflow	Hotn rolled coil–Pickling –Cold rolling– Cover annealing–Skin pass–Coiling
Price Term:	CIF CFR FOB EX-WORK
Advantages	1. Reasonable price with excellent quality 2. Abundant stock and prompt delivery 3. Rich supply and export experience, sincere service
Alloy or not	Non-Alloy
product description	appearance： excellent quality,the surface can be polished or color coated
	function：fire and heat resisitance
	performance：hard, high strength
	advantage： widely applicable, can be used in machiney,metal door,bed, car and construction, etc.,and the price is cheap

Standard	Grade	General Size	Delivery Condition
ASTM A36	A36/A36-B	5-20 * 2300-2500 * C	Boron added or Black Condition
ASTM A283	A283-B/A283C	5-20 * 2300-2500 * C	Boron added or Black Condition
ASTM A572	A572Gr50-B/A572Gr42-B	5-20 * 2300-2500 * C	Boron added or Black Condition
ASTM A515	A515Gr70	5-20 * 2300-2500 * C	Boron added or Black Condition
ASTMA516	A5l6Gr70	5-20 * 2300-2500 * C	Boron added or Black Condition
JISG3101	SS400-B	5-20 * 2300-2500 * C	Boron added or Black Condnion
JISG3136	SN400B	5-20 * 2300-2500 * C	Boron added or Black Condition
EN1002S-2.2004	S235JR・S355K2+N	5-20 * 2300-2500 * C	Boron added or Black Condiiion
EN10025-5 2004	S355J2W/S355K2W	5-20 * 2300-2500 * C	Boron added or Black Condition

Grade	Rank	Chemical Composition( %)
Grade	Rank	C	Mn	Si	S	P
Q195		0.06-0.12	0.25〜0.50	≤0.3	≤0.05	≤0.045
	A	0.09-0.15	0.25-0.55	≤0 3	≤0.05	≤0.045
Q215	B	0.09-0.15	0.25-0.55	≤0 3	≤0.045	≤0.045
Q215	A	0 .14 〜0.22	0.30-0.65	≤0 3	≤0.05	≤0.045
Q235	B	0.12-0.20	0.30-0.70	≤0 3	<0.045	≤0.045
	C	≤0.18		—	≤0.04	≤0.04
	D	≤0.17	0.35-0.80	—	≤0.035	≤0.035
Q255	A	0.18〜0.28		≤0 3	≤0.05	≤0.045
Q255	B	0.18〜0.28	0.40-0.70	≤0 3	≤0.045	—
Q275		0.28-0.38	0 50-0.80	≤0.35	≤0.05	≤0.045

1. Chemical Composition of Q235 Carbon Steel Plate (%)

Element Q235A Q235B Q235C Q235D

Carbon (C) ≤0.22% ≤0.20% ≤0.17% ≤0.17%
Manganese (Mn) ≤1.40% ≤1.40% ≤1.40% ≤1.40%
Silicon (Si) ≤0.35% ≤0.35% ≤0.35% ≤0.35%
Sulfur (S) ≤0.050% ≤0.045% ≤0.040% ≤0.035%
Phosphorus (P) ≤0.045% ≤0.045% ≤0.040% ≤0.035%
Deoxidation Rimmed (F)/Killed (Z) Killed (Z) Killed (Z) Killed (Z)

Notes:

Quality Grade Improvement: From A to D, sulfur and phosphorus content decreases progressively, enhancing low-temperature toughness and purity.

Deoxidation Methods:

Q235A: Can be rimmed steel (low cost, good surface finish, but with segregation).

Q235B/C/D: Must be killed steel (uniform composition and stable performance).

Trace Elements: Q235D may contain small amounts of vanadium (V), titanium (Ti), or niobium (Nb) to improve low-temperature toughness.

2. Mechanical Properties of Q235 Carbon Steel Plate

Property Q235A/B (Thickness ≤16mm) Q235C/D (Thickness ≤16mm)

Yield Strength (σₛ) ≥235 MPa ≥235 MPa
Tensile Strength (σ₆) 375~500 MPa 375~500 MPa
Elongation (δ₅, 50mm) ≥26% (longitudinal) ≥26% (longitudinal)
Impact Energy (-20°C) Not required Q235D: ≥27 J
Hardness (HB) 120~160 (as-rolled) 120~160 (as-rolled)

Notes:

Thickness Effect: Yield strength slightly decreases with increasing thickness (refer to standard classification tables). For example, Q235B with 40~60mm thickness requires a yield strength of ≥225 MPa.

Low-Temperature Toughness: Q235D offers impact resistance at -20°C, suitable for cold-region structures.

Cold Bending Performance: Q235 exhibits good cold bending properties, ideal for folding and stamping.

3. Typical Applications

Construction: Building frames, steel workshops, bridge supports.

Mechanical Manufacturing: Shafts, bolts, brackets, and non-high-strength components.

Containers & Piping: Low-pressure storage tanks, ventilation ducts (requires rust prevention).

General Hardware: Angle steel, channel steel, sheet piles.

4. Comparison with Q195 and Q345

Parameter Q195 Q235B Q345B (Low-Alloy Steel)

Yield Strength ≥195 MPa ≥235 MPa ≥345 MPa
Tensile Strength 315~430 MPa 375~500 MPa 470~630 MPa
Carbon Content ≤0.12% ≤0.20% ≤0.20%
Low-Temperature No requirement No requirement (Q235D: available) -20°C Impact ≥34 J
Cost Lowest Moderate Higher

Q390 Q420 Q460 Q690 Q690D Carbon Steel Plate

—Product Show

Q390 Q420 Q460 Q690 Q690D Carbon Steel Plate

—Factory Workshop

Q390 Q420 Q460 Q690 Q690D Carbon Steel Plate

—Product Packaging

1. Chemical Composition of Q235 Carbon Steel Plate (%)

2. Mechanical Properties of Q235 Carbon Steel Plate

Yield Strength (σₛ) ≥235 MPa ≥235 MPaTensile Strength (σ₆) 375~500 MPa 375~500 MPaElongation (δ₅, 50mm) ≥26% (longitudinal) ≥26% (longitudinal)Impact Energy (-20°C) Not required Q235D: ≥27 JHardness (HB) 120~160 (as-rolled) 120~160 (as-rolled)

3. Typical Applications

4. Comparison with Q195 and Q345

Yield Strength ≥195 MPa ≥235 MPa ≥345 MPaTensile Strength 315~430 MPa 375~500 MPa 470~630 MPaCarbon Content ≤0.12% ≤0.20% ≤0.20%Low-Temperature No requirement No requirement (Q235D: available) -20°C Impact ≥34 JCost Lowest Moderate Higher

Yield Strength (σₛ) ≥235 MPa ≥235 MPa
Tensile Strength (σ₆) 375~500 MPa 375~500 MPa
Elongation (δ₅, 50mm) ≥26% (longitudinal) ≥26% (longitudinal)
Impact Energy (-20°C) Not required Q235D: ≥27 J
Hardness (HB) 120~160 (as-rolled) 120~160 (as-rolled)

Yield Strength ≥195 MPa ≥235 MPa ≥345 MPa
Tensile Strength 315~430 MPa 375~500 MPa 470~630 MPa
Carbon Content ≤0.12% ≤0.20% ≤0.20%
Low-Temperature No requirement No requirement (Q235D: available) -20°C Impact ≥34 J
Cost Lowest Moderate Higher