GB/T 4171 Q550NH

 Q550NH,GB/T 4171 Q550NH,Q550NH Steel Plate,Q550NH Supplier

Unitedsteel Carbon Plate Factory are specialized in producing and exporting GB/T 4171 Q550NH Atmospheric corrosion resistance steel plate, Low alloy and high strength steel plate, heavy plate and wide, heavy plate, Which is a large steel plate supplier mill at Unitedsteel Group. Q550NH, GB/T 4171 Q550NH, Q550NH Steel Plate, Q550NH steel factory

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  1. Q550NH Adopt standardGB/T 4171 Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
  2. Q550NH Specification:  Thickness: 1mm to 100mm; Width: 1500mm to 3500mm: Length: 3000mm to 27000mm
  3. Third Party Inspection for Q550NH: ABS, DNV, BV, GL, CCS, LR, RINA, KR, NK, CE, SGS, IKE, IEI or other quality department.
  4. Q550NH Chemical composition % of the Product analysis of grade
Q550NH Chemical Composition
Grade Q550NH The Element Max (%)
Q550NH C Si Mn P S
0.16 0.65 2.0 0.025 0.030
Cu Cr Ni Other  
0.20-0.55 0.30-1.25 0.12-0.65    
  1. Q550NH Mechanical Property
According to GB/T 4171 Thickness


Min Yield (Mpa) Elongation (%) Tensile(MPa)
Q550NH To 16 550 16 620-780
16-40 540 16
40-60 530 15
  1. Q550NH Delivery Time Or Lead Time: 15-30days
  2. Q550NH Extra Service: Pretreatment (Shot Blasting, Sand Blast, Painting and Galvanized), Cutting Parts, Sample Service, Third Party inspection, UT Test and Size inspection.
  3. If you have any requirement in steel plate for Q550NH, whether the new plate or stock list of material, please feel free to contact us by email of calling.
  4. If you had any question at our plate or service. Please contact our after service department to get faster reply.

Unitedsteel Group Company Principle


More Cheaper Price,

More Faster Delivery,

The Best Company Prestige,

The Best After sales service,

The One step Steel material Solution

The Best Professional quality control system

Supplementary Requirements

S2. Product Analysis,       S8: Ultrasonic Examination

S3: Simulated pos-weld heat treatment of mechanical

S15: Reduction of area measurement and test coupons

S18: Maximum Tensile strength

S6: Drop weight test

S30:Charpy V notch impact test for structural shapes

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