Definition
DX: The first letter D represents flat steel for cold forming, and the second letter X represents that the rolling state of the substrate is not specified.
51~57: The numbers indicate the steel grade serial number; the D after the two digits is the code of hot-dip galvanizing. Z means that the coating is pure zinc, ZF means galvanized iron alloy, AZ means galvanized zinc.
DX51D is a European standard, galvanized with 51 steel coil raw materials, equivalent to SGCC. DX51D refers to the bending and forming grade galvanized steel coil sheet, the steel grade serial number is 51, with low carbon steel as the base material.
Chemical composition of DX51D steel
DX51D is a galvanized sheet of bending and forming grade, the steel grade serial number is 51, with low carbon steel as the base material.
Steel grade serial numbers 52-56 are steel plates or strips for stamping.
The main chemical components of DX51D are as follows:
| C% | Si% | Mn% | P% | S% | Alt% |
|---|---|---|---|---|---|
| ≤0.07 | ≤0.03 | ≤0.50 | ≤0.025 | ≤0.025 | ≥0.020 |
Mechanical properties of DX51D steel
| Quality | Material-No. | Possible coating | Testing direction | Yield point Rp0,2 (MPa) | Minimum yield strength, ReH (MPa) | Minimum elongation ratio, % | Nominal gauge, mm | |
|---|---|---|---|---|---|---|---|---|
| DX51D | 1.0917 | +Z, +ZF, +ZA, +AZ, +AS, +ZM | Q | - | 270-500 | 22 | 0.57-2.00 |
DX51D equivalent
- Japanese standard SGCC JIS G 3302
- Chinese Standard 01 gb2518-2004
- German standard ST02Z
- American Standard CS-B ASTM A 653
DX51D+Z275 definition
DX51D+Z275 refers to a common material galvanized coil with a galvanized layer of 275g.
DX51D+Z is called hot-dip galvanizing, and 275 represents 275 grams of zinc plated. That is to say, a layer of zinc is plated on the hot-dip galvanizing.
In general, N refers to the fingerprint-resistant coating on the surface. A refers to the A-level surface. C represents roll, coil, generally 1.0*1250*C (thickness, width, length), generally, rolls are random, represented by C.
DX51D+Z275 MAC
DX51D+Z275 refers to hot-dip galvanizing. Hot-dip galvanizing is coated with a layer of zinc. 275 represents 275 grams of zinc.
The substrate used in hot-dip galvanizing is cold-rolled, and the zinc plating on the cold-rolled sheet is called galvanizing. Ordinary hot-dip galvanizing is 80 grams. 140 and 275 are high zinc layers, and the purpose of hot-dip galvanizing is to prevent the steel from rusting.
- Z275 zinc layer quality 275g/㎡ (double-sided)
- M without spangle
- A Normal surface
- C Passivation treatment
For galvanized steel, only by fully understanding its various aspects, can we make better use of it, give full play to its maximum role, and serve us.
DX51D vs DC51D
DX51D and DC51D refer to the material of hot-dip galvanized steel sheets. The difference between the two is as follows:
1. Different grades
DX51D is an EU brand, and DC51D is a special brand of Baosteel.
2. Different standards
DX51D uses the EN10327 standard, and DC51D uses the Q/BQB402 standard.
2. Different substrates
DX51D uses the same level as DC01 when the base plate is cold-rolled, and the same level as DD11 when it is hot. DC51D substrate is DC01 cold-rolled low-carbon steel plate.
