SA213-T91 High-strength Alloy Steel Tube supplied by Hebei K-Steel Pipe Industry

 ASTM A213-T91 is a high-strength alloy steel tube used primarily for high-temperature service in power generation and petrochemical industries. Hebei K-Steel Pipe Industry is in the supplier list of PETROCHINA It is a chromium-molybdenum (Cr-Mo) ferritic steel, known for excellent creep strength, oxidation resistance, and thermal stability.

Element

Content (%)

Carbon (C) 0.08–0.12

Manganese (Mn) 0.30–0.60

Phosphorus (P) ≤0.020

Sulfur (S) ≤0.010

Silicon (Si) 0.20–0.50

Chromium (Cr) 8.00–9.50

Molybdenum (Mo) 0.85–1.05

Nickel (Ni) 0.40 max

Vanadium (V) 0.18–0.25

Nitrogen (N) 0.06–0.12

Property

Typical Value

Tensile Strength 585–690 MPa

Yield Strength 415–450 MPa

Elongation ≥20%

Hardness (HRB) 197–217

Applications

Boiler tubes in power plants

Superheater and reheater tubes

High-temperature piping in refineries and chemical plants

Heat exchangers subjected to creep and oxidation

Key Features

High resistance to creep deformation at elevated temperatures (up to ~600 °C).

Good oxidation and corrosion resistance in high-temperature steam environments.

Excellent weldability when proper procedures are followed.

Compatible with ferritic heat treatments to improve strength.

Comments

Post a Comment

Popular posts from this blog

Key Requirements for Steel Pipes in The Fluid Transport Industry

  Requirement Category                  Details Mechanical Properties                        High yield strength, good ductility (elongation ≥ 20%), impact resistance                                                              (especially low-temperature toughness) Weldability                                            Easy field welding, weld strength matching base metal, HAZ toughness compliant Corrosion Resistance                         External coating required (e.g., 3LPE, FBE); internal lining or coating (cement         ...
Read more

API 5L X42 PSL2 Welded Line Pipe Supplied by Hebei K-Steel Pipe Industry

  API 5L X42 PSL2   welded line pipe is engineered for medium-pressure oil, gas, and water transmission lines where enhanced toughness, stricter chemical limits, and traceability are required.   Hebei K-Steel pipe industry   can Manufacture to   API   Specification   API 5CT , this pipe outperforms PSL1 in fracture resistance, weldability, and low-temperature performance — ideal for onshore and offshore projects with demanding service conditions. Key Features: 1) Excellent weldability and dimensional accuracy 2) Delivery conditions N, Q, or M available to optimize properties 3) Suitable for high-pressure and critical pipeline applications 4) Strict chemical and mechanical property control than PSL1
Read more

K-STEEL STEEL PIPE MANUFACTURE PROCESS SPECIFICATION

https://www.k-steels.com/K-STEEL-SEAMLESS-STEEL-PIPE-MANUFACTURE-PROCESS-SPECIFICATION-id46133655.html   Steel Making Equipments EAF/BOF, LF 2. Cont inuous Casting 3. Billet inspection and cutting Inspection item: heat no, length, marking, dimensions, surface quality 4. Rotary Hearth Furnace Equipment:Φ28m rotating furnace. According to the procedure 5. Piercing & rolling-Equipment: ROLL Machine. According to the procedure . 6.Stretch Reducing Equipment:reducing sizing mill. 7. Normalizing Equipment:Heat Treatment Furnace, C omputer A id C ontrol S ystem 8. Straightening pressure straightening machine pressure straightening 9. Sampling for pipe body La dle Analysis: 1/heat Product chemical composition ： 2/ heat Tensile test ： 1 PCS/ lot ≤ 100PCS Traceability marking (heat and lot number) is applied on the sample and then on the specimen. 10. Product chemical composition Laboratory equipment Spectroanalysis instrument Pro...
Read more