Zhangjiagang Bonded Area Yaxin Precision Tube Co., Ltd. 

Zhangjiagang Bonded Area Henglong Steel Tube Co., Ltd.

Steel Tubing for Automotive Powertrain, Shock Aborber, Steering 

And Steel Tubing for Heat Exchanger, Superheater, Reheater, Boiler, Mechanical

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Alloy Steel Seamless High Temperature Steel Tubing ASTM A335

Alloy Steel Seamless High Temperature Steel Tubing ASTM A335

Alloy Steel Seamless High Temperature Steel Tubing ASTM A335

Product Details:

Brand Name: HENGLONG
Certification: ISO9001, OHSAS18001, ISO14001, PED97/23/EC

Payment & Shipping Terms:

Price: Negoniation
Packaging Details: Wooden case
Delivery Time: 15-30 days
Payment Terms: L/C, T/T
Supply Ability: 6000 metric tons per month
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Detailed Product Description
Standard: ASTM A335 Material: Alloy Steel
Section: Round Shape: Straight
Application: High Temperature Service

High Temperature Alloy Steel Seamless Pipe ASTM A335




Surface Treatment: Oiling/Black painting/Varnish/Passivation/Phosphating/Pickling

Ends: BE/PE, ends caps

Marking: as per requirement

Delivery Condition: Annealed/Normalized/Tempered


As per standard or as per customer’s requirement
Length: ≤16m. Fixed Length (6m,9m,12m, 16m or as per requirement) or random length

Package: Hexagonal Bundles with steel strips and plastic wrapping outside/Wooden box/Wooden crate/Steel frame/As per customer’s requirement




Grade UNS C Mn P≤ S≤ Si Cr Mo
P1 K11522 0.10~0.20 0.30~0.80 0.025 0.025 0.10~0.50 -- 0.44~0.65
P2 K11547 0.10~0.20 0.30~0.61 0.025 0.025 0.10~0.30 0.50~0.81 0.44~0.65
P5 K41545 ≤0.15 0.30~0.60 0.025 0.025 ≤0.50 4.00~6.00 0.45~0.65
P9 S50400 ≤0.15 0.30~0.60 0.025 0.025 0.25~1.00 8.00~10.00 0.90~1.10
P11 K11597 0.05~0.15 0.30~0.60 0.025 0.025 0.50~1.00 1.00~1.50 0.44~0.65
P12 K11562 0.05~0.15 0.30~0.61 0.025 0.025 ≤0.50 0.80~1.25 0.44~0.65
P22 K21590 0.05~0.15 0.30~0.60 0.025 0.025 ≤0.50 1.90~2.60 0.87~1.13



Grade Tensile Strength σb(Mpa) Yield Strength σs(Mpa) Elongation δ(%)
P1 ≥380 ≥205 ≥20
P2 ≥380 ≥205 ≥20
P5 ≥415 ≥205 ≥20
P9 ≥415 ≥205 ≥20
P11 ≥415 ≥205 ≥20
P12 ≥415 ≥220 ≥20
P22 ≥415 ≥205 ≥20



CHEMICAL COMPOSTION TEST. MECHANICAL PROPERTIES TEST(tensile strength, yield strength, elongation, flaring, flattening,hardness, etc). SURFACE AND DIMENSION CHECK. NON-DESTRUCTIVE TEST(eddy current test/ultrasonic test), HYDRAULIC TEST.




This specification covers seamless ferritic alloy-steel pipe (nominal wall and minimum wall) for high-temperature service. The pipe shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics. Grade P2 and P12 steel pipes shall be made by coarse-grain melting practice. The steel material shall conform to chemical composition, tensile property, and hardness requirements. Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices. The range of pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practices. The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.

Top quality products



High-temperature service. Superheater. Heat-exchanger and other heat supply/heat transfer equipment, etc.


Competitive Advantage:

Advanced equipments. Serious attitude on quaity control. Sincere and truth attitude to customers. Always put customer's benefit on first consideration make us set up good long-term relationships with cusomters.

Contact Details
Zhangjiagang Bonded Area Henglong Steel Tube Co., Ltd.

Contact Person: Yaxin

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