GB/T 4171 atmospheric corrosion resisting structural steel

Standard: GB/T 4171-2008
Grades: Q235NH, Q265GNH, Q295NH, Q295GNH, Q310GNH, Q355NH, Q355GNH, Q415NH, Q460NH, Q500NH, Q550NH
Category: atmospheric corrosion resisting structural steel
Feature: atmospheric corrosion resistance property
Application: vehicles, bridges, containers, buildings, towers and other structural parts.
Thickness size range: up to 100mm
Shapes: plates, sheet, strip and section

GB/T 4171 steel equivalent

GB/T4171-2008	ISO 4952-2006	ISO5952-2005	EN10025-5: 2004	JIS G3114-2004	JIS G3125-2004
Q235NH	S235W	HSA235W	S235J0W,J2W	SMA400AW,BW,CW	-
Q355NH	S355W	HSA355W2	S355J0W,J2W,K2W	SMA490AW,BW,CW	-
Q355GNH	S355WP	HSA355W1	S355J0WP,J2WP	-	SPA-H
Q460NH	S460W	-	-	SMA570W,P	-

Chemical composition (%) for GB/T 4171 steel in 2008 version

Grade	Carbon	Silicon	Manganese	Phosphorous	Sulfur	Copper	Chromium	Nickel
Q235NH	≤0.13	0.10-0.40	0.20-0.60	≤0.030	≤0.030	0.20-0.55	0.40-0.80	≤0.65
Q265GNH	≤0.12	0.10-0.40	0.20-0.50	0.07-0.12	≤0.020	0.20-0.45	0.30-0.65	0.25-0.50
Q295NH	≤0.15	0.10-0.50	0.30-1.00	≤0.030	≤0.030	0.25-0.55	0.40-0.80	≤0.65
Q295GNH	≤0.12	0.10-0.40	0.20-0.50	0.07-0.12	≤0.020	0.25-0.45	0.30-0.65	0.25-0.50
Q310GNH	≤0.12	0.20-0.75	0.20-0.50	0.07-0.12	≤0.020	0.20-0.50	0.30-1.25	≤0.65
Q355NH	≤0.16	≤0.50	0.50-1.50	≤0.030	≤0.030	0.25-0.55	0.40-0.80	≤0.65
Q355GNH	≤0.12	0.20-0.75	≤1.00	0.07-0.15	≤0.020	0.25-0.55	0.30-1.25	≤0.65
Q415NH	≤0.12	≤0.65	≤1.10	≤0.025	≤0.030	0.25-0.55	0.30-1.25	0.12-0.65
Q460NH	≤0.12	≤0.65	≤0.15	≤0.025	≤0.030	0.20-0.55	0.30-1.25	0.12-0.65

Mechanical properties in 2008 version

Grade	Yield strength(MPa) min for Thickness in mm				Tensile strength (Mpa)	Elongation(%)
Grade	≤16	>16≤40	>40≤60	>60	Tensile strength (Mpa)	≤16	>16≤40	>40≤60	>60
Q355GNH	355	345	-	-	490-630	22	22	-	-
Q310GNH	310	-	-	-	≥450	26	-	-	-
Q295GNH	295	285	-	-	430-560	24	24	-	-
Q265GNH	265	-	-	-	≥410	27	-	-	-
Q235NH	235	225	215	-	360-510	25	25	24	23
Q295NH	295	285	275	255	430-560	24	24	23	22
Q355NH	355	345	335	325	490-630	22	22	21	20
Q415NH	415	405	395	-	520-680	22	22	20	-

GB/T 4171 atmospheric corrosion resisting structural steel is produced in cold-rolled and hot rolled -rolled steel plates, sheets and sections. Due to the good quality of atmospheric corrosion resistance, GB/T 4171 steel plates can be used in vehicles, bridges, containers, buildings, towers and other structures.

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