DX51D Steel

DX51 Steel, usually referred to as galvanized steel with the grade DX51. It is a base material of steel in which the numbers and letters represent different meanings. In addition, it can be processed into galvanized coils as well as galvanized sheets, and galvanized strips. Wanzhi Steel is a steel mill that has been established for 14 years, specializing in galvanized steel sheet/coil/tube, with many production lines, and we can meet bulk orders at the same time, among which DX51 Steel is one of our hot-selling galvanized steel. We accept customization of different thicknesses and sizes, welcome to contact us to learn more.

DX51D Steel Specification

Item	DX51D Steel
Place of Origin	Shandong, China
Delivery Time	15-28 days
Material	Mild Steel(SGCC/CGCC/TDC51D/TDC52D/TS350GD/TS550GD/DX51D+Z/Q195-q345)
Processing Service	Punching, Cutting, Slitting, Decoiling
Thickness	0.12mm-6.0mm
Width	20-1500mm
Surface Treatment	Chromated/non-Chromated, Oiled/Non-oiled, Skin Pass
Zinc coating	30-275g/㎡
Technique	Cold Rolled
Surface Structure	Regular Spangle, Minimum Spangle, Large Spangle, Zero Spangle
Tolerance	Thickness tolerance: +/-0.02mm，Width tolerance: -0/+3mm
Standard	AISI, ASTM, DIN, JIS, GB, EN
Shape	Plate, Coil
MOQ	5 tons
Payment term	TT 30% Advance + 70% Balance
Sample	Free Available
Price Item	FOB, CIF, EXW, etc
Packing	Standard Sea-worthy Packing
Certification	ISO 9001, SGS, ABS, BV

Basic Definition

DX51D is a common low-carbon galvanized steel sheet, which belongs to the hot-dip galvanized steel (GI) grade defined in the European standard EN 10346. It is mainly used in the fields of construction, home appliances, and light industry. Its name means:

• D: Stands for cold forming steel (Ductile).
• X: Indicates that the base material is low-carbon steel.
• 51: Indicates the material grade (standard strength level).
• D: Indicates that the coating type is pure zinc (Zinc Coating).
• +Z: Zinc layer marking, indicating the total weight of the double-sided zinc layer, unit g/m².

For example, DX51D+Z275 means continuous hot-dip galvanizing of flat profiles, and the unit weight of the zinc layer is 275g/㎡.

DX51D Steel Chemical Composition

C%	Si%	Mn%	P%	S%	Alt%
≤ 0.07	≤ 0.03	≤ 0.50	≤ 0.025	≤ 0.025	≥ 0.020

Mechanical properties of DX51D steel

Nominal gauge, mm	Minimum yield strength, ReH	Minimum elongation ratio
0.57-2.00	270-500MPa	22 %

Key Features of DX51D Steel

• Good corrosion resistance: A zinc layer is formed on the surface of the steel plate through the hot-dip galvanizing process. The zinc layer can effectively isolate air and moisture and prevent the steel plate substrate from rusting. The common zinc layer weights are 80g, 120g, 150g per square meter, etc. The thicker the zinc layer, the stronger the corrosion resistance.
• Good processing performance: It belongs to the bending and forming grade galvanized sheet, which can be simply bent and folded, etc. It is suitable for mechanical processing and structural manufacturing, and can meet the processing of ventilation ducts, switch cabinets, etc.
• Moderate strength: It has certain strength and toughness, and can withstand a certain degree of deformation while ensuring structural strength.
• High material purity: With low-carbon steel as the base material, the carbon content does not exceed 0.18%, the manganese content does not exceed 1.2%, the phosphorus content does not exceed 0.12%, and the sulfur content does not exceed 0.045%. The impurity content is low, which ensures the stable performance and processing adaptability of the steel.
• Diverse specifications: Thickness, width, and length can be customized according to needs. The common length is between 1-12m, which can meet different application scenarios and processing requirements.

Compared with other galvanized steel

DX51D, DX52D, DX53D, and DX54D are all galvanized steel sheets for cold forming. Their main difference lies in their different mechanical properties, which leads to different uses.

• DX51D: The yield strength is not clearly specified, the tensile strength is 270-500MPa, and the minimum elongation after fracture is 22%. It belongs to the ordinary commodity level and is one of the most commonly used galvanized steel sheets with certain strength and corrosion resistance.
• DX52D: The yield strength is 140-300MPa, the tensile strength is 270-420MPa, and the minimum elongation after fracture is 26%. Compared with DX51D, it has lower strength but better ductility. It belongs to stamping grade steel and can be used for some simple stamping processes.
• DX53D: The yield strength is 140-260MPa, the tensile strength is 270-380MPa, and the minimum elongation after fracture is 30%. It has good ductility and formability, and is mainly used to manufacture deep stamping parts.
• DX54D: Yield strength is 120- 220MPa, tensile strength is 260-350MPa, minimum elongation after fracture is 36%, minimum r90 value is 1.6, and minimum n90 value is 0.18. Its strength is relatively low, but its plasticity and toughness are very good, and it has excellent deep drawing performance and anti-strain aging performance.

Uses of DX51D Steel

• Construction: used to manufacture rainwater drainage pipes and ventilation pipes for industrial and civil buildings. It can also be used as roofing materials, new wall light steel keels, ceiling keels, corrugated plates, rolling shutters, sandwich panels, fences, etc. It is also commonly used in the structural parts of large buildings, such as airports and stadiums.
• Home appliance: the shell or internal parts of home appliances such as air conditioners, washing machines, refrigerators, and microwave ovens, such as refrigerator back panels, air conditioner internal and external machine shells, etc. Its corrosion resistance can ensure that home appliances do not easy to rust easily and extend their service life.
• Transportation: It can be used to make internal and external panels of various vehicles, and can also be used for highway guardrails, street light poles, highway isolation nets, isolation railings, and various traffic indicator signs.
• Industrial: industrial pipelines, air ducts, outdoor cabinet frame structures, etc., can also be used to manufacture some mechanical parts that do not require high stamping performance, thanks to their corrosion resistance and certain strength.
• Light industry & commerce: It can be used to make cylinders, barrels, boxes, furnace tubes, billboards, etc. It can also be used for armored cables, straps, containers, etc.
• Agriculture, animal husbandry, and fishery: It can be used to make granaries, drying equipment, storage and transportation containers, as well as various marine corrosion-resistant frames, plastic greenhouse structures, agricultural tools, etc.
• Power communication: It can be used to make various transmission towers, TV transmission towers, relay towers, cable racks, which can be used outdoors for a long time and resist erosion from the natural environment.

Recommended Selection

• Choose DX51D: Construction, home appliances, and general use.
• Choose DX52D: Auto parts, complex stamping parts.
• Choose DX53D: Precision hardware, high-end home appliances.
• Choose DX54D: High-end automotive panels, electronic housings.

FAQ

Q: Can DX51D replace stainless steel?
A: It can be used for short-term corrosion protection (such as dry environment), but it is recommended to use stainless steel or higher zinc layer (such as DX53D+AZ150, galvanized zinc) in high corrosion environment (chemical plant, coastal area).
Q: What is the difference between DX51D and SGCC?
A: SGCC is a Japanese standard (JIS G 3302) and can be used as an equivalent material for DX51D. The performance is similar, but DX51D is more universal (mainstream in European/Chinese markets).
Q: How to judge the quality of the zinc layer?
A: It can be tested by ① salt spray test, ② zinc layer thickness gauge,e ③ observation of surface uniformity (no leakage, zinc slag).

Q: What is DX51D AZ150 material?

A: Dx51d AZ150 is a hot-dip aluminum-zinc steel alloy with a coating of 55 percent aluminum, 1.6 percent silicon, and 43.4 percent zinc. The chemical composition of Dx51d AZ150 offers superior resistance to heat and corrosion, with high thermal reflectivity and conductivity.

Production process

• Substrate preparation: cold-rolled low-carbon steel coil, such as SPCC.
• Pretreatment: alkaline degreasing → pickling and rust removal → solvent plating.
• Hot-dip galvanizing: immersion in 450℃ zinc liquid → air knife control zinc layer → cooling and solidification.
• Post-treatment: chromate passivation (environmentally friendly) → oiling for rust prevention.

Maintenance of DX51D Steel

• Remove dust and dirt regularly, rinse or wipe with mild detergent.
• Prevent scratches and avoid contact with sharp objects.
• Prevent water accumulation. Choose DX51D to produce corrugated sheets with regular wave shapes, which can drain rain and snow water well.
• Prevent direct contact with other metals to prevent chemical reactions.

DX51D Steel sheet and coil package

Where to buy DX51D Steel- Wanzhi Steel, A Trusted Manufacturer

Wanzhi Steel is one of the top steel manufacturers in China. We have a factory in Shandong Province, specializing in the production of Galvanized Steel coil, GI sheet, as well as hot rolled coil,color-coated steel coils, etc. Besides, the hot rolled steel coil price is lower than the cold rolled coil. Wanzhi Steel has decades of experience in exporting. We have helped customers from France, Turkey, the Philippines, Brazil, Argentina, etc. With our rich experience, we will help you choose suitable materials for your projects. If you want to know the latest price, please contact us now. We will reply in 10 hours.