What is the equivalent of CR340LA+Z steel?
International equivalent grades
|
Standard system |
Equivalent grades |
Key differences |
Applicable regions |
|
China GB |
CR340LA+Z (GB/T 20564) |
Completely corresponds to the original standard |
Mainland China |
|
Europe EN |
HX340LAD+Z (EN 10346) |
The yield strength range is slightly wider (330-430MPa) |
EU/Middle East |
|
US ASTM |
A653 HSLAS 340+Z |
The coating is expressed in G value (such as G90) |
North America/South America |
|
Japan JIS |
SAPH440+Z (JIS G 3113) |
The tensile strength is higher (440-590MPa) |
Japan/Southeast Asia |
|
International ISO |
CR340LA+Z (ISO 16143) |
Consistent with China GB standard |
General international projects |
What is the difference between CR340LA+Z and CR240LA+Z?
|
Comparison items |
CR240LA+Z |
CR340LA+Z |
Differences |
|
Strength grade |
240 grade (yield 240-320MPa) |
340 grade (yield 340-420MPa) |
340LA has a 40% increase in strength |
|
Tensile strength |
340-420MPa |
410-510MPa |
Higher load-bearing capacity |
|
Alloy composition |
contains trace amounts of Nb/V |
Higher Mn, Nb/V addition |
More strengthening elements in 340LA |
|
Typical applications |
home appliance housing/lightweight structural parts |
Automobile anti-collision beam/heavy-duty shelf |
340LA is used for high-stress components |
|
Stamping difficulty |
ordinary punch press (300T) |
Requires large tonnage punch press (≥500T) |
340LA requires higher equipment investment |
|
Coating suitability |
suitable for Z60-Z100 |
Recommended Z80-Z140 (high-strength substrate requires thicker coating) |
Different anti-corrosion requirements |
Is CR340LA+Z galvanized steel coil material good?
CR340LA+Z steel has:
High strength: yield strength 340-420 MPa, tensile strength 410-510 MPa, 40%+ higher load-bearing capacity than ordinary galvanized steel (such as DX51D)
Good formability: elongation ≥22%, suitable for medium-complexity stamping and bending processing
Long-term corrosion protection: hot-dip galvanized layer (Z80-Z140 optional), salt spray test 1000+ hours without red rust
Lightweight advantage: can be thinned by 20%-25% to replace traditional steel and reduce material costs
Environmental protection process: support chromium-free passivation (RoHS compliance), meet environmental protection requirements
CR340LA+Z material grade?
It belongs to high-strength low-alloy steel (HSLA) and its strength level is between commercial grade (such as DX51D) and ultra-high-strength steel (such as CR420LA).
CR340LA+Z galvanized steel coil is used for?
Automobile: B-pillar reinforcements, chassis parts (must comply with IIHS/CNCAP collision standards)
Construction: load-bearing shelves, steel structure connectors (must meet GB 50017 load requirements)
Home appliances: high-end washing machine drums (must pass 10-year salt spray test)
