Docol 550LA High Strength Low Alloy Steel (HSLA)
Docol 550LA is a high-strength low-alloy steel that provides properties for modern rapid production methods. It is supplied with S550MC based on EN 10149-2:2010 standard.
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- Commodity name: Docol 550LA High Strength Low Alloy Steel (HSLA)
Docol 550LA is a high-strength low-alloy steel that provides properties for modern rapid production methods. It is supplied with S550MC based on EN 10149-2:2010 standard.
Docol 550LA High Strength Low Alloy Steel (HSLA) Description
Docol 550LA HSLA has main alloying elements of carbon, manganese, molybdenum, chromium and nickel. Docol 550LA HSLA improves strength while maintaining good toughness, giving it superior performance in withstanding impact and tensile stress. Besides, HSLA steel has lower alloying element content, which is beneficial to the implementation of welding processes. Docol 550LA HSLA steel has a wide range of applications, among which bridge construction is one of the most important applications. Because the steel has high strength, good toughness and wear resistance, it can greatly reduce the structural weight in the construction of bridges and improve the wind resistance and service life of bridges.
Mechanical Properties
Steel Grade
Standard
Plating
Test Direction
Yield Strength Rp0.2 (MPa)
Tensile Strength Rm (MPa)
Extension Rate A80( min%)
Minimum Bend Inner Diameter for 90 ° Bend
Docol HR
550LA
VDA239- 100:2016
UC, Cam tho
L
550-670
610-750
12
1.0xt
Chemical Composition
Steel Grade
Plating
C
(max %)
Si
(max %)
Mn
(max %)
P
(max %)
S
(max %)
Al
( min%)
Ti
(max%)
Nb
(max %)
Cu
(max %)
Docol HR
550LA
UC
0.12
0.60
1.80
0.025
0.025
0.015
0.15
0.09
0.20
Docol HR
550LA
GI
0.12
0.60
1.80
0.030
0.025
0.015
0.15
0.10
0.20
Plating
Plating Type
Plating Grade
Standard
Single-sided coating quality, single-point test (g/m2)
Single side thickness, for reference only(μm)
GI
40/40
VDA239-100
40-60
5.6-8.5
GI
50/50
VDA239-100
50-70
7.0-9.9
GI
60/60
VDA239-100
60-90
8.5-12.7
GI
70/70
VDA239-100
70-100
9.9-14.1
GI
85/85
VDA239-100
85-115
12.0-16.2
GI
115/115
VDA239-100
115-155
16.2-21.8
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Docol 550LA High Strength Low Alloy Steel (HSLA) - Stock Warehouse
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Docol 550LA High Strength Low Alloy Steel (HSLA) - Product Inspection
Tensile Strength Testing Tensile Strength Testing Physical Performance Testing Chemical Composition Testing 
Inspection Hardness Testing Spectral Detection Mechanical Properties -
Docol 550LA High Strength Low Alloy Steel (HSLA) - Product Measurement
Thickness measurement Thickness measurement Thickness measurement Thickness measurement 
Thickness measurement Thickness measurement Thickness measurement Width measurement -
Docol 550LA High Strength Low Alloy Steel (HSLA) - Product Packaging
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