Q420B LSAW pipes are high-strength, low-alloy steel pipes widely used for the conveyance of oil, petroleum products, natural gas, town gas, water, and coal slurry.
They are also applied in construction, bridges, power engineering, and other industrial projects. Manufactured according to GB/T 1591 standards, these pipes combine excellent mechanical properties, weldability, and toughness to ensure reliable performance under demanding conditions.
Chemical Composition (Max %, Heat Analysis)
| Element | C | Mn | Si | P | S | V | Nb | Ti | Al | Cr | Ni |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Max % | 0.20 | 1.00–1.70 | 0.55 | 0.040 | 0.040 | 0.02–0.20 | 0.015–0.060 | 0.02–0.20 | – | 0.40 | 0.70 |
Mechanical Properties
| Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Impact Energy at +20℃ (J) | 0℃ | -20℃ | -40℃ |
|---|---|---|---|---|---|---|---|
| ≤16 | 420 | 520–680 | 18 | 34 | – | – | – |
| >16–35 | 400 | 520–680 | 18 | 34 | – | – | – |
| >35–50 | 380 | 520–680 | 18 | 34 | – | – | – |
| >50–100 | 360 | 520–680 | 18 | 34 | – | – | – |
Additional Technical Conditions
UT (Ultrasonic Testing) for defect detection
AR (As Hot-Rolled)
TMCP (Thermo-Mechanical Control Process)
N (Normalized), Q+T (Quenched & Tempered)
Z Direction Test (Z15, Z25, Z35)
Charpy V-Notch Impact Test
Third-Party Testing (e.g., SGS)
Optional Coating or Shot Blasting & Painting
Applications
Oil & Gas Industry: Conveyance of oil, natural gas, petroleum, and town gas
Water & Slurry Transport: Water pipelines, coal slurry pipelines
Construction & Engineering: Bridge structures, power stations, industrial facilities
Other Product Information
Other Names: GB/T1591 Q420B LSAW pipe, GB/T1591 grade pipe, Q420B LSAW steel pipe
Packaging: Standard export seaworthy packing or per customer requirements
Delivery Time: 30–50 days (7 days for stock goods)
Loading Ports: Shanghai, Tianjin, Qingdao
Supply Ability: 5,000 MT per month
Minimum Order Quantity: 1 piece
