ST04Z galvanized steel coil is equivalent to?
|
Standard system |
Equivalent grades |
Key differences |
|
Chinese national standard |
DC04+Z(GB/T 2518) |
Performance is completely the same, coating weight must be specified (such as Z80) |
|
European standard EN |
DC04+Z(EN 10346) |
Completely equivalent, ST04Z is the old German DIN brand |
|
Japanese standard JIS |
SPCD-Z(JIS G 3302) |
Coating may contain zinc flowers, surface treatment needs to be confirmed |
|
American standard ASTM |
A653 DDS Type |
Deep drawing performance needs to be checked (elongation ≥ 34%) |
|
International ISO |
CR4+Z(ISO 4998) |
Coating weight and substrate performance need to be verified |
The full equivalent grade of ST04Z steel coil is DC04+Z (European standard). Other standard grades need to be noted:
✔ Japanese standard SPCD-Z: Need to confirm whether the zinc spangle is acceptable
✔ American standard A653 DDS: Need to verify the elongation
✔ Special requirements (such as chrome-free, fingerprint-resistant) need to be clearly marked
What is the material grade of ST04Z galvanized steel?
ST04Z is an ultra-deep drawing grade hot-dip galvanized steel sheet in the German DIN standard. It is a high-end formability material grade among galvanized steel coils and is designed for complex stamping and deep drawing processes.
Standard basis: DIN 1624 (substrate) + EN 10346 (coating)
Grade positioning: between ordinary deep drawing grades (such as ST03Z) and high-strength deep drawing grades (such as ST05Z).
What is the difference between ST04Z steel and DX53D+Z?
|
Comparison items |
ST04Z (DIN 1624) |
DX53D+Z (European standard EN 10346) |
Differences |
|
Standard system |
Old German DIN grade |
European standard new grade |
ST04Z is mostly used in German projects, DX53D+Z is universal |
|
Substrate grade |
Ultra-deep drawing grade (elongation ≥ 34%) |
Deep drawing grade (elongation ≥30%) |
ST04Z is suitable for more complex stamping (such as fuel tanks) |
|
Tensile strength |
260-350 MPa |
270-380 MPa |
DX53D+Z has a wider strength range |
|
Yield strength |
≥180 MPa |
≥140 MPa |
ST04Z has stronger deformation resistance |
|
Coating type |
Pure zinc (Z) |
Pure zinc (Z) or zinc aluminum magnesium (ZM) optional |
DX53D+Z has stronger corrosion resistance (ZM coating) |
|
Surface treatment |
Smooth finishing/small zinc flowers |
Smoothing/zinc flower/chrome-free passivation (more options) |
DX53D+Z has more flexible environmental protection options |
|
Typical application |
Automobile fuel tanks, high-end home appliances deep drawing parts |
Household appliance housing, building structural parts |
ST04Z is used for high forming requirements |
|
Cost |
Higher (super-deep drawing grade premium) |
Lower (economical deep drawing) |
DX53D+Z has better cost performance |
Will ST04Z steel coil rust?
ST04Z galvanized steel will rust, but only if the coating is broken, depleted or in extreme environments
Corrosion resistance life of different coatings (salt spray environment)
|
Coating weight |
Salt spray test (h) |
Typical service life (C3 environment) |
|
Z40 |
200-400 |
3-5 years |
|
Z60 |
400-600 |
5-8 years |
|
Z80 |
600-1000 |
8-12 years |
|
Z120 |
1000-1500 |
12-15 years |
C3 environment refers to moderate industrial or coastal climate (ISO 12944 standard)