Q355NH H-Beam | Weathering Steel H Beam, A588 S355J2WP SMA490BW Equivalent

Superior atmospheric corrosion resistance for outdoor exposure
Eliminates the need for protective painting, reduces long-term maintenance cost
Good structural strength and stable mechanical performance
Forms dense rust patina layer to block further corrosion
Custom processing service for architectural & infrastructure projects

Product Overview

Q355NH H-Beam belongs to Weathering Steel grade. It is equivalent to ASTM A588, EN S355J2WP and JIS SMA490BW. This weathering H shape steel contains alloying elements like Cu, Cr, Ni. When exposed to the atmosphere, it will form a compact, stable rust patina layer on the surface to prevent further corrosion. It can be used without paint coating for outdoor environments. Widely used for port trestles, outdoor unmaintained structures and weathering steel facades. Our Q355NH H-beam is manufactured according to GB/T 11263 standard. We supply multiple standard sizes and provide cut-to-length, drilling and surface treatment services. Mill test certificates are provided for all shipments to meet global infrastructure and architectural project requirements.

H-Beam

Chemical & Mechanical Property Snapshot

Item	Value
Grade	Q355NH
Yield Strength ≥	355 MPa
Tensile Strength	470 – 630 MPa
Elongation ≥	21%
Impact Test	-20℃ Charpy V-notch impact
C (Carbon)	≤0.20%
Mn (Manganese)	≤1.50%
Si (Silicon)	≤0.50%
P (Phosphorus)	≤0.030%
S (Sulfur)	≤0.030%
Cu (Copper)	0.25%~0.55%

Detailed Technical Specifications

Specification	Details
Product Name	Q355NH Weathering Steel H-Beam
Standard	GB/T 11263
Equivalent Grade	A588, S355J2WP, SMA490BW
Size Range	Height:100–900mm; Flange width:100–400mm
Surface	Hot rolled black / Natural rust patina
Processing	Cut to fixed length, drilling, edge treatment
MOQ	5 Ton
Lead Time	7–15 working days
Certification	ISO, Mill Test Certificate (MTC)

Dimension Table

Designation	Height (H) mm	Flange Width (B) mm	Web Thickness (tw) mm	Flange Thickness (tf) mm	Weight kg/m	Section Area cm²
Chinese Standard HW Wide-Flange H-Beam
HW100×100	100	100	6	8	17.2	21.9
HW125×125	125	125	6.5	9	23.8	30.3
HW150×150	150	150	7	10	31.9	40.6
HW200×200	200	200	8	12	50.5	64.3
HW250×250	250	250	9	14	72.4	92.2
HW300×300	300	300	10	15	94.0	119.7
HW400×400	400	400	13	21	172.6	219.8
HW500×500	500	500	15	23	239.0	304.5
HW600×600	600	600	17	26	319.0	406.4
Chinese Standard HM Medium-Flange H-Beam
HM150×100	150	100	6	9	20.4	26.0
HM200×150	200	150	6.5	9	31.2	39.8
HM250×175	250	175	7	11	44.1	56.0
HM300×200	300	200	8	12	57.3	73.0
HM350×250	350	250	9	14	79.7	101.3
HM400×300	400	300	10	16	104.0	132.6
HM450×300	450	300	11	18	121.0	154.4
HM500×300	500	300	12	20	138.0	176.0
Chinese Standard HN Narrow-Flange H-Beam
HN100×50	100	50	4.5	7	9.54	12.2
HN150×75	150	75	5	7	14.3	18.3
HN200×100	200	100	5.5	8	20.9	26.7
HN250×125	250	125	6	9	29.0	36.9
HN300×150	300	150	6.5	9	37.3	47.5
HN350×175	350	175	7	11	50.0	63.7
HN400×200	400	200	8	13	66.0	84.1
HN450×200	450	200	9	14	76.5	97.4
HN500×200	500	200	10	16	89.6	114.2
HN600×200	600	200	11	17	106.0	135.2
HN700×300	700	300	13	24	185.0	235.5
HN800×300	800	300	14	26	210.0	267.4
HN900×300	900	300	16	28	243.0	309.1
HN1000×300	1000	300	18	30	277.0	352.2
European Standard HEB Wide-Flange Heavy H-Beam
HEB100	100	100	6	10	20.4	26.0
HEB120	120	120	6.5	11	26.7	34.0
HEB140	140	140	7	12	33.7	43.0
HEB160	160	160	8	13	42.6	54.3
HEB180	180	180	8.5	14	51.6	65.7
HEB200	200	200	9	15	61.3	78.1
HEB220	220	220	9.5	16	71.5	91.2
HEB240	240	240	10	17	83.1	106.0
HEB260	260	260	10.5	17.5	93.0	118.4
HEB280	280	280	11	18	103.0	131.4
European Standard HEA Wide-Flange Light H-Beam
HEA100	100	96	5	8	16.7	21.3
HEA120	120	114	5	8	20.4	26.0
HEA140	140	133	5.5	8.5	24.7	31.5
HEA160	160	152	6	9	29.9	38.1
HEA180	180	171	6	9.5	35.5	45.2
HEA200	200	190	6.5	10	42.3	53.9
European Standard IPE Narrow-Flange I-Beam
IPE80	80	46	3.8	5.2	6.0	7.6
IPE100	100	55	4.1	5.7	8.1	10.3
IPE120	120	64	4.4	6.3	10.4	13.2
IPE140	140	73	4.7	6.9	12.9	16.4
IPE160	160	82	5	7.4	15.8	20.1
IPE180	180	91	5.3	8	18.8	23.9
IPE200	200	100	5.6	8.5	22.4	28.5
IPE220	220	110	5.9	9.2	26.2	33.4
IPE240	240	120	6.2	9.8	30.7	39.1
IPE270	270	135	6.6	10.2	36.1	45.9
IPE300	300	150	7.1	10.7	42.2	53.7
Japanese Standard H-Beam
H100×50	100	50	4.5	7	9.5	12.2
H150×75	150	75	5	7	14.3	18.3
H200×100	200	100	5.5	8	20.9	26.7
H300×150	300	150	6.5	9	37.3	47.5
H400×200	400	200	8	13	66.0	84.1
H500×250	500	250	9	14	89.0	113.4
H600×300	600	300	12	17	118.0	150.1
H700×300	700	300	13	24	185.0	235.5

Product Comparison Table

Grade Group	Chinese GB Grade	American ASTM Grade	European EN Grade	Japanese JIS Grade	Core Performance Feature	Typical Application Scenario
Weathering Steel	Q355NH	A588	S355J2WP	SMA490BW	Atmospheric corrosion resistance, no painting required for outdoor use	Port trestles, outdoor unmaintained structures, weathering facades

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FAQs

What grades is Q355NH H-Beam equivalent to?

Q355NH weathering H-Beam is equivalent to ASTM A588, EN S355J2WP and JIS SMA490BW atmospheric corrosion resistant steel.

What is the unique feature of Q355NH weathering steel?

It can form a dense protective rust layer under outdoor atmospheric conditions, which stops further corrosion. It can be applied without anti-rust paint, saving maintenance cost.

What are the main applications for Q355NH H-Beam?

It is widely used for port trestles, outdoor unmaintained structures, weathering facades, landscape architecture and outdoor infrastructure projects.

Can Q355NH H-Beam be custom cut?

Yes, we can cut H-beams to your specified length, and offer drilling and other fabrication processing.

What documents will you provide for shipment?

Mill Test Certificate (MTC) will be provided with each batch to verify chemical composition and mechanical properties.

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Q355NH H-Beam | Weathering Steel H Beam, A588 S355J2WP SMA490BW Equivalent