High Strength Low Alloy Steel

Docol 550LA High Strength Low Alloy Steel (HSLA)

Docol 550LA High Strength Low Alloy Steel (HSLA) DescriptionDocol 550LA HSLA hasmain alloying elements of carbon, manganese, molybdenum, chromium and nickel.Docol 550LAHSLA improves strength while maintaining good toughness, giving it superior performance in withstanding impact

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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

550-670

610-750

1.0xt

Chemical Composition

Steel Grade

Plating

(max %)

( min%)

(max%)

(max %)

Docol HR

550LA

0.12

0.60

1.80

0.025

0.015

0.15

0.09

0.20

Docol HR

550LA

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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Mahan Selon	Greatest product ever We have been purchasing yulun galvanized steel coils for the quality has consistently exceeded our expectations. The coating uniformity, corrosion resistance, and surface finish meet our strict standards, making them ideal for construction.