DX51D is a grade of cold rolled low carbon steel sheet and strip. Originated from the European Industrial Standard (EN), some domestic steel mills also use this grade as their corporate standard. Sometimes SGCC appears at the same time as it. For most professional steel practitioners, SGCC and DX51D can replace each other under the premise of certain consistent delivery requirements. DX51D steel is mainly used for manufacturing cold-formed steel, welded steel pipe, automobile bodies, automobile parts, building structures, general steel plate components, etc. This steel has a specific chemical composition and mechanical properties, excellent stamping performance, welding performance, and surface quality, and can meet various cold forming requirements. It meets the needs of a variety of applications.

Material characteristics

It has good plasticity, toughness, welding performance, and cold forming performance, and its yield strength is moderate, which is conducive to stamping and other processing processes. In addition, the DX51D steel plate also has good corrosion resistance and is suitable for use in a variety of environments.

Surface quality

The surface quality is usually high, without obvious defects such as cracks, inclusions, bubbles, etc. This helps to ensure the reliability and durability of the steel plate during subsequent processing and use.

Processing performance

It has good stamping performance and welding performance and is suitable for various cold forming processes such as stamping, bending, stretching, etc. At the same time, it can also match various welding methods, such as resistance welding, gas-shielded welding, etc.

 

Grade	DX51D
European standard steel grade	1.0917
Corresponding standard	EN 10346-2015
Classification	Continuously hot-dip coated steel flat products for cold forming – Technical delivery conditions

Mechanical properties of DX51D steel

Item	Nominal gauge, mm	Minimum yield strength, ReH (σb Mpa)	Minimum elongation ratio δ, %
Hot dip galvanized steel sheet	0.57-2.00	270-500	A80: ≥22

 

The minimum elongation applies to the following thicknesses, t represents the thickness of the plate:

1). 0.5mm < t ≤ 0.7mm, the minimum elongation is 2% less than the value in the table;

2). 0.35mm < t ≤ 0.5mm, the minimum elongation is 4% less than the value in the table;

3). t ≤ 0.35mm, the minimum elongation is 7% less than the value in the table.

Chemical composition of DX51D steel, %

С	Si	Mn	P	S	Ti
≤0.18	≤0.5	≤1.2	≤0.12	≤0.045	≤0.03

Chemical composition and mechanical properties according to EN 10346

In fact, combining the above ingredients and properties gives us the following table, which summarizes the chemical and mechanical properties.

 

Steel grade number	Coating symbol	Chemical composition (Ladle analysis), max. %						Mechanical properties
		C	Si	Mn	P	S	Ti	Tensile strength, Rm, MPa	Elongation A80, min. %
1.0226	+Z	0.18	0.50	1.20	0.12	0.045	0.30	270-500	22

Material Comparison

Chinese Standards	Japanese Standard	European Standards
DX51D+Z/DC51D+Z (CR)	SGCC	DX51D+Z
DX52D+Z/DC52D+Z	SGCD1	DX52D+Z
DX53D+Z/DC53D+Z/DX54D+Z/DC54D+Z	SGCD2/SGCD3	DX53D+Z/DX54D+Z
S220/250/280/320/350/550GD+Z	SGC340/400/440/490/570	S220/250/280/320/350GD+Z
DX51D+Z/DD51D+Z (HR)	SGHC	DX51D+Z

Analogues to DX51D steel

US (AISI, ASTM, ASME)	ASTM A653/A653M Class B
Germany (DIN)	1.0322, 1.0335, DC01, DC04, DC04G1, DD11, DD13, St12, St14, St22, StW24, USt3, USt4

Low-carbon steel for cold forming

Properties according to DIN EN 10 346

Short designation	VDA239-100	Surface finish	Material number
DX51D	–	+Z,+ZF,+ZA,+ZM,+AZ,+AS	1.0917

Application

It is commonly used in the construction industry for facade and roofing materials, including flues, corrugated panels, gutters, and all systems exposed to high humidity. Also in switch cabinets, electrical industry, ventilation technology, and air conditioning systems, it is also used in agricultural equipment in silos and barns as well as steel furniture.

 Different grades, different national standard chemical composition table

Standard	Grade	C	Si	Mn	P	S	Ti
For cold forming Chinese standard	DX51D+Z	0.12	0.50	0.60	0.100	0.045	0.30
	DX52D+Z	0.12	0.50	0.60	0.100	0.045	0.30
	DX53D+Z	0.12	0.50	0.60	0.100	0.045	0.30
	DX54D+Z	0.12	0.50	0.60	0.100	0.045	0.30
	DX56D+Z	0.12	0.50	0.60	0.100	0.045	0.30
	DX57D+Z	0.12	0.50	0.60	0.100	0.045	0.30
For cold forming Japanese standard	SGCC	0.15	0.50	0.80	0.050	0.030	0.025
	SGCD1 SGCD2	0.12 0.10	0.50 0.50	0.60 0.45	0.040 0.030	0.030 0.030	0.025 0.025
	SGCD3	0.08	0.50	0.45	0.030	0.030	0.025
	SGCD4	0.06	0.50	0.45	0.030	0.030	0.025
For structures Japanese standards	SGC340	0.25	0.50	1.70	0.200	0.035	0.025
	SGC400 SGC440	0.25 0.25	0.50 0.50	1.70 2.00	0.200 0.200	0.035 0.035	0.150 0.150
	SGC490	0.30	0.50	2.00	0.200	0.035	0.025
	SGC510	0.30	0.50	2.50	0.200	0.035	0.025
For structures AISI standards	S220GD+Z	0.20	0.60	0.70	0.100	0.045	0.025
	S250GD+Z	0.20	0.60	0.70	0.100	0.045	0.025
	S280GD+Z	0.20	0.60	0.70	0.100	0.045	0.025
	S320GD+Z	0.20	0.60	0.70	0.100	0.045	0.025
	S350GD+Z	0.20	0.60	0.70	0.100	0.045	0.150
	S550GD+Z	0.20	0.60	0.70	0.100	0.045	0.150

 DX51D and other grades’ mechanical properties

Grade	Yield strength MPa≥	Tensile strength MPa≥	Elongation A%≥
DX51D+Z/ZM/AZ/AM	240-380	270-500	22
DX52D+Z/ZM/AZ/AM	140-300	270-420	26
DX53D+Z/ZM/AZ/AM	140-260	270-380	30
DX54D+Z/ZM/AZ/AM	120-220	260-350	36
S220GD+Z/ZM/AM	220	300	20
S250GD+Z/ZM/AZ/AM	250	330	19
S280GD+Z/ZM/AM	280	360	18
S300GD+AZ/AM	300	380	18
S320GD+Z/ZM/AM	320	390	17
S350GD+Z/ZM/AZ/AM	350	420	16
S450GD+AZ/AM	450	480	15
S550GD+Z/ZM/AZ/AM	550	550	－

Surface treatment type

Generally, the galvanized sheets and coils produced will be surface treated to improve corrosion resistance and paint adhesion, which is a way to protect the steel surface. The following are 8 surface treatment methods.

Surface treatment type	Code	Features
Chromic acid treatment	C	Good corrosion resistance, suitable for exposed state
Chromic acid treatment + oiling	S	Good corrosion resistance
Phosphoric acid treatment (including sealing treatment)	P	It has certain corrosion resistance and good paint performance
Phosphoric acid treatment (including sealing treatment) + oiling	Q	It has a certain degree of corrosion resistance, good paint performance, prevents rust during transportation and storage
Phosphoric acid treatment (excluding sealing treatment)	T	It has certain corrosion resistance and good paint performance
Phosphoric acid treatment (excluding sealing treatment) + oiling	V	It has certain corrosion resistance, good paint performance, and prevents rust
Oiling	O	Prevent rust during transportation and storage
No treatment	M	Suitable for immediate painting

How much does it cost?

Due to different plate thickness and surface treatment processes, as well as different order quantities, the price of DX51D is about 564 yuan/ton to 846 yuan/ton, which is a more common price range in the market and applies to most specifications of Dx51D steel plates.

Some DX51D plates with lower quality grades and smaller specifications have lower prices, about 423 dollars/ton to 563 dollars/ton.

 

For accurate prices please contact professional technicians

and calculate the price based on the size.

Summary

In summary, the Dx51D steel plate is a kind of cold-rolled low-carbon steel plate and strip with excellent performance and wide application. Determine the appropriate thickness, specification, and performance level according to the specific environment and requirements. If you still have questions about DX51D, The online manager will answer your questions promptly, you can also leave us a message.

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