01
ASTM A335 / A335M
Seamless ferritic alloy steel pipe
Standard specification for seamless ferritic alloy-steel pipe for high-temperature service.
Alloy Steel — Industrial Product
Alloy Steel Pipe
Low-alloy 4140 steel pipe supplied to ASTM A335 / EN 10216-2, normalized and tempered for boiler and power generation applications.
Indicative priceUSD 850 - 1,150 / MT
Lead time15 - 25 working days
01
Overview
Alloy Steel Pipe combines low-alloy 4140 chemistry with chromium and molybdenum additions for reliable mechanical performance at elevated temperatures and consistent dimensional control. The normalized and tempered condition delivers proven creep resistance and weldability, making the pipe suited to boiler tubes, power generation systems, petrochemical plant and high-temperature service piping. Supplied to ASTM A335 / EN 10216-2 with mill test certification per EN 10204 3.1, it supports global procurement for high-temperature and high-pressure projects.
Key Characteristics
- 01 High Strength Provides high mechanical strength for demanding structural and industrial applications.
- 02 High Hardness Provides increased surface hardness and resistance to mechanical wear.
- 03 Wear Resistance Provides improved resistance to abrasive and mechanical wear.
- 04 Impact Resistance Offers good resistance to impact loading and sudden mechanical stress.
- 05 Good Toughness Provides good toughness and resistance to brittle fracture.
- 06 Standard Compliance Manufactured and supplied in accordance with the specified material and product standards.
Typical Applications
- Boiler Tubes Water-wall, superheater and economizer tubes for utility and industrial boilers.
- Power Generation Piping, tubing and structural components for conventional and combined-cycle power stations.
- Petrochemical Piping, process systems and equipment for refining, petrochemical production and hydrocarbon processing.
02
Specifications
Numbers in this section correspond to the applicable product standard, formatted for direct use in enquiry and approval documents.
Product specification
- Material
- Low-alloy steel
- Grade
- 4140 / 1.7225 / 42CrMo4
- UNS designation
- G41400
- Product form
- Pipe / tube
- Manufacturing method
- Hot finished / cold drawn
- Surface / condition
- Mill finish
- Cross-section
- Hollow circular, uniform wall thickness
Supply specifications
- Outside diameter
- 6 - 630 mm
- Wall thickness
- 0.5 - 40 mm
- Length
- 3 - 12 m; custom lengths on request
- Schedule range
- Sch 5S through XXS
- Tolerance
- According to ASTM A312 / ASME B36.19
- Surface finish
- Mill finish; pickled on request
- Marking
- Standard mill marking; customer marking on request
Final supply is confirmed against the project drawing, purchase agreement and the mill test certificate.
Chemical composition
ElementRequirement
C 0.30 - 0.40 %
Si 0.15 - 0.40 %
Mn 0.60 - 0.90 %
P <= 0.035 %
S <= 0.040 %
Cr 0.80 - 1.10 %
Mo 0.15 - 0.25 %
Fe Balance
Reference: applicable standard Alloy Steel.
Mechanical properties
PropertyRequirement
Tensile strength >= 655 MPa
Yield strength (0.2% offset) >= 415 MPa
Elongation in 50 mm >= 18 %
Hardness 197 - 235 HB
Reference: applicable standard Alloy Steel at room temperature.
Physical properties
PropertyTypical Value
Density 7.85 g/cm³
Elastic modulus 205 GPa
Thermal conductivity 42 W/m·K at 100°C
Electrical resistivity 0.22 μΩ·m
Specific heat 475 J/kg·K
Melting range 1,450 - 1,520 °C
Thermal expansion 12.0 x 10⁻⁶ /°C
Reference: Typical material values, Alloy Steel.
Reference framework
Standards & documentation
The applicable product, dimensional and inspection standards should be confirmed together in the purchase specification.
02
ASME SA335
ASME high-temperature pipe reference
ASME counterpart of ASTM A335 for high-temperature service applications.
03
ASME B36.10M
Welded and seamless wrought steel pipe
Dimensional reference for nominal pipe size, outside diameter and wall thickness.
04
EN 10216-2
Seamless steel tubes for pressure purposes
European reference for seamless tubes of non-alloy and alloy steel with specified elevated temperature properties.
05
JIS G3458
Alloy steel pipes for piping
Japanese reference for alloy steel pipes used for piping at high temperatures and pressures.
06
EN 10204
Inspection documents
Defines inspection document types such as 3.1 and 3.2 for metallic product delivery.
03
Capability
From custom dimensions and precision sizing to heat treatment, surface finishing and product-specific processing, Wayland coordinates supply solutions tailored to your requirements.
Cutting
Cut-to-length and custom cutting according to order requirements.
Custom Dimensions
Non-standard dimensions, tolerances and dimensional combinations subject to product and mill capability.
Precision Sizing
Precision sizing and dimensional control for tighter tolerance requirements.
Cold Working
Cold drawing, cold sizing and other cold-working processes where required.
Heat Treatment
Heat treatment according to material, specification and applicable standard.
Surface Finishing
Surface treatment and finishing according to product, specification and application requirements.
Forming
Bending, forming and other shape modification according to drawings or order requirements.
End Preparation
Beveling, threading, chamfering and other end preparation according to product requirements.
Welding & Fabrication
Welding, fabrication and related assembly according to drawings and project requirements.
Customization
Custom dimensions, lengths, surface conditions, end preparations and inspection requirements can be supplied according to project specifications. Final capability is confirmed per enquiry based on grade, size range and applicable standard.
04
Quality
Inspection and documentation procedures are coordinated to meet the requirements of the applicable product standard and the project specification.
- Dimensional inspection Geometry, dimensions and tolerances against the applicable standard
- Visual and surface inspection Surface condition, marking and overall appearance
Documents
- Inspection Report
- Chemical analysis Per heat, against the applicable standard
- Mechanical testing Tensile, yield, elongation and hardness
- Non-destructive testing UT, eddy-current, hydrostatic or other NDT as applicable
- Positive material identification PMI for alloy verification when required
Documents
- Mill Test Certificate (MTC)
- Heat number traceability Heat number carried through MTC and product marking
- Third-party inspection coordination SGS / BV / TÜV on request
Documents
- Third-Party Inspection Report
- EN 10204 documentation 3.1 MTC standard; 3.2 on request
Documents
- EN 10204 3.1 Mill Test Certificate
- EN 10204 3.2 Inspection Certificate
- Certificate of Origin
05
Selection
A well-prepared specification is the most efficient defence against clarification cycles.
- 01 Select material & grade
Choose the material grade according to service conditions, performance requirements and applicable standards.
- 02 Define size & supply condition
Specify the required dimensions, surface condition, heat-treatment condition and delivery requirements.
- 03 Confirm standard & requirements
State the applicable product standard, dimensional standard and governing project specification.
- 04 Define inspection & documentation
Confirm inspection, testing, certification and documentation requirements before order placement.
Example procurement specification
A complete specification suitable for enquiry, covering product, technical requirements, certification and delivery terms.
- Product
- Alloy Steel Pipe
- Grade
- 4140
- Standard
- ASTM A335
- Dimensions
- OD 168.3 mm × WT 7.11 mm × Length 6000 mm (NPS 6, Sch 40S)
- Condition
- Normalized & Tempered; Plain Ends
- Certification
- EN 10204 3.1 Mill Test Certificate
- Quantity
- 20 Metric Tons
- Packaging
- Seaworthy Export Packing
- Incoterm
- CIF Hamburg
06
Logistics
From mill dispatch to destination port, each stage is coordinated with the nominated forwarder and documented against the purchase specification.
-
Packaging
Export-suitable packaging with surface and edge protection.
Bundled, wrapped or crated according to product form and transport mode. Outer surface protected with weather-resistant material; ends and edges shielded against transit damage.
-
Loading
FCL container for standard sizes; break bulk for oversized cargo.
Container loading via nominated forwarder. LCL and dimensions outside container allowance coordinated against the mill dispatch schedule.
-
Documentation
Commercial invoice, packing list and certificate of origin.
Mill documentation travels with the shipment. EN 10204 3.1 / 3.2 certificates and third-party inspection reports provided as per purchase specification.
-
Shipment
Sea freight as standard; alternative routes on request.
FCL / LCL container shipment or break bulk for oversized dimensions. Logistics coordinated through the nominated forwarder.
-
Delivery
FOB · CFR · CIF · FCA · EXW arrangements available.
Incoterm 2020. Port of loading: Shanghai / Ningbo / Shenzhen. Final destination and terms confirmed per enquiry.
07
FAQ
Most enquiries reduce to a small set of recurring technical questions.
01 What is 4140 alloy pipe used for?
4140 alloy pipe (P11 / P22 family equivalents) is used for high-temperature service in power generation, petrochemical, refinery and boiler applications where carbon steel is not adequate.
02 What is the typical delivery condition?
4140 alloy pipe is typically supplied in normalized and tempered or quenched and tempered condition to meet the specified mechanical properties.
03 Is seamless or welded construction available?
Alloy steel pipe in this product line is supplied as seamless to ASTM A335. Welded alternatives (A691) can be considered on request.
04 What testing is performed?
Hydrostatic test, flattening test, hardness test and chemical / mechanical tests per ASTM A335. Additional NDT such as UT or ET can be specified.
05 Can alloy pipe be supplied with beveled ends?
Yes. Plain end, beveled end (30°), threaded and coupled end preparations are available to project specification.