Q355NH L53550 - YB /T 4112-2013

Grade	Q355NH
	L53550
Corresponding Standard	YB /T 4112-2013 Welded steel tubes with atmospheric corrosion resistance for structural purposes
Classification	Alloy Steel

Q355NH Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	-	-	0.5	-	-	0.4	-	0.25
Maximum Value	0.16	0.5	1.5	0.03	0.03	0.8	0.65	0.55

① To improve the properties of steel, one or more microalloying elements can be added: Nb (0.015% to 0.060%), V (0.02% to 0.12%), Ti (0.02% to 0.10%), and Alt ≥ 0.020%. When these elements are used together, at least one of them should meet the lower limit of the chemical composition specified.
② Alloying elements such as Mo (≤ 0.30%) and Zr (≤ 0.15%) can be added.

Q355NH Mechanical Properties

Thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
t≤16	490~630	≥355	≥18
16＜t≤40	490~630	≥345	≥18
40＜t≤60	490~630	≥335	≥18

• B,C-quality class
• According to the requirements of the demander, other test temperatures can be used after negotiation between the supply and demand parties and indicated in the contract.

Approximate Comparison Table Atmospheric Corrosion Resisting Structural Steel

China	Japan	United States	International Organization for Standardization	European Standard
GB	JIS	ASTM	ISO	EN
Q355NH GB/T 4171-2008	SMA490AW SMA490BW SMA490CW JIS G3114-2004	Grade K A606-04	S355W ISO 4952-2006 HSA355W2 ISO 5952-2005	S355J0W S355J2W S355K2W EN 10025-5-2004

Q355NH Corresponding Standards(Same grade name, different standards)

1	GB /T 4171-2008
	Q355NH L53550
2	YB /T 4112-2013
	Q355NH L53550
3	GB /T 4172-2000
	Q355NH L53550

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!