ASTM A106 Seamless Pipe Gr.B/C Supplier | Sch 40/80 Stock | Cangzhou Shenlong
High-Temp Carbon Steel, Ready to ShipWe supply ASTM A106 Grade B and Grade C seamless pipes from stock for high-temperature applications in power plants, refineries, and industrial process piping.
ASTM A106 Seamless Carbon Steel Pipe – Gr.B & Gr.C
*Schedule 40 / 80 / 160, High-Temperature Service, ASME B31.1 / B31.3*
What Is ASTM A106?
Key requirements (not found in A53 or API 5L):
| Requirement | ASTM A106 | ASTM A53 | API 5L PSL1 |
|---|---|---|---|
| Killed steel | ✅ Mandatory | ❌ Not required | ❌ Not required |
| Hydrostatic test | ✅ 100% | ⚠️ Lot-based | ✅ 100% |
| Impact testing | ⚠️ Optional | ❌ Not covered | ⚠️ PSL2 only |
| Maximum carbon (Gr.B) | 0.30% | 0.30% | 0.26% (PSL2) |
A106 is not interchangeable with A53 or API 5L.If your specification calls for A106, we supply A106 – not an "equivalent".
Ready Stock – NPS ½" to 24", Sch 40 / Sch 80
| NPS | OD (mm) | Sch 40 Wall (mm) | Sch 80 Wall (mm) | Sch 160 Wall (mm) | Stock Location |
|---|---|---|---|---|---|
| ½" | 21.3 | 2.77 | 3.73 | 4.78 | Cangzhou |
| ¾" | 26.7 | 2.87 | 3.91 | 5.56 | Cangzhou |
| 1" | 33.4 | 3.38 | 4.55 | 6.35 | Cangzhou |
| 2" | 60.3 | 3.91 | 5.54 | 8.74 | Cangzhou |
| 4" | 114.3 | 6.02 | 8.56 | 13.49 | Cangzhou |
| 6" | 168.3 | 7.11 | 10.97 | 18.26 | Cangzhou |
| 8" | 219.1 | 8.18 | 12.70 | 23.01 | Cangzhou |
| 12" | 323.8 | 10.31 | 17.48 | 33.32 | Cangzhou |
| 20" | 508.0 | 15.09 | 26.19 | — | Mill direct (4 wks) |
Above 24" (610 mm) seamless is not commercially viable. Specify LSAW or hot-expanded seamless – contact for feasibility.
Chemical Composition – Heat Analysis (max %)
| Grade | C | Mn | Si | P | S | Cr+Cu+Ni+Mo ≤ |
|---|---|---|---|---|---|---|
| A106 Gr.A | 0.25 | 0.27–0.93 | 0.10 | 0.035 | 0.035 | 1.00% |
| A106 Gr.B | 0.30 | 0.29–1.06 | 0.10 | 0.035 | 0.035 | 1.00% |
| A106 Gr.C | 0.35 | 0.29–1.06 | 0.10 | 0.035 | 0.035 | 1.00% |
Mechanical Properties (Room Temperature)
| Grade | Tensile Strength (MPa) | Yield Strength min (MPa) | Elongation (%) |
|---|---|---|---|
| Gr.A | 415–585 | 205 | 30–35* |
| Gr.B | 415–585 | 240 | 27–33* |
| Gr.C | 485–655 | 275 | 25–30* |
For other common specifications, see our dedicated pages on ASTM A53 and API 5L.
ASTM A106 vs. A53 vs. API 5L – Critical Differences
| Feature | ASTM A106 Gr.B | ASTM A53 Gr.B | API 5L Gr.B PSL1 |
|---|---|---|---|
| Killed steel | ✅ Mandatory | ❌ Not required | ❌ Not required |
| Hydrotest | ✅ 100% | ⚠️ Lot-based | ✅ 100% |
| NDT requirement | ❌ None | ❌ None | ❌ None (PSL1) |
| Impact testing | ⚠️ Optional | ❌ Not covered | ⚠️ PSL2 only |
| Typical use | High-temp piping | Structural/fluid | Pipeline |
? Impact Testing – When It Is Mandatory
ASTM A106 does not require impact testing by default.However, We offer impact testing at specified temperatures.Common requirements: 0°C, -20°C.
Applications – Where A106 Is Specified
| Industry | Application | Grade | Typical Size |
|---|---|---|---|
| Power generation | Main steam lines, boiler auxiliaries | Gr.B / Gr.C | 4"–12" Sch 80/160 |
| Oil refining | Hydrocracker, reformer, coker piping | Gr.B | 2"–10" Sch 40/80 |
| Petrochemical | Process piping, high-temp transfer lines | Gr.B | ½"–8" Sch 40 |
| Industrial utilities | High-pressure condensate, steam tracing | Gr.B | ½"–2" Sch 80 |
| Offshore platforms | Instrument air, utility systems | Gr.B | 2"–6" Sch 40 |
Quality Assurance – Every Order Includes
✅ EN 10204 3.1 Mill Test Report – heat-specific chemistry, tensile, flattening, hydrotest
✅ Full heat traceability – from billet to finished pipe
✅ 100% hydrostatic test – pressure held ≥5 seconds
✅ Visual & dimensional inspection – OD, WT, straightness, end squareness
✅ ASME B31.1 / B31.3 compliance documentation upon request
Request for Quotation
Exploring the Durability of ASTM A106 B Seamless Pipe
ASTM A106 Seamless Pipe Gr B: Properties and Applications
Exploring ASTM A106: A Comprehensive Guide to Seamless Carbon Steel Pipe Specifications
Black Carbon Steel Pipe Manufacturer for ASTM A106 Applications
How to choose the right supplier for A106 seamless steel pipe?
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