01
ASTM A506
Alloy and structural alloy steel sheet and strip
Standard specification for alloy and structural alloy steel sheet and strip, hot-rolled and cold-rolled.
Alloy Steel — Industrial Product
Alloy Steel Coil
Low-alloy 4140 steel coil supplied to ASTM A506 / EN 10084 for machinery, power generation and petrochemical applications.
Indicative priceUSD 850 - 1,150 / MT
Lead time10 - 20 working days
01
Overview
Alloy Steel Coil combines low-alloy 4140 chemistry with chromium and molybdenum additions for reliable mechanical performance, high tensile strength and consistent dimensional control after heat treatment. The coil is suited to heavy machinery, power generation equipment, petrochemical components, tooling blanks and pressure vessel fabrication. Supplied to ASTM A506 / EN 10084 with mill test certification per EN 10204 3.1, it supports procurement for demanding structural and mechanical applications.
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
- Appliance Manufacturing Enclosures, panels and structural components for household and commercial appliances.
- Machinery & Equipment Shafts, gears, housings, frames and other components for industrial machinery and OEM equipment.
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
- Coil / strip
- Manufacturing method
- Hot rolled / cold rolled
- Surface / condition
- Mill finish
- Cross-section
- Coiled strip, constant thickness and width
Supply specifications
- Thickness
- 0.3 - 6.0 mm
- Width
- 600 - 1,830 mm
- Coil weight
- 3 - 25 MT per coil
- Inner diameter
- 508 mm / 610 mm
- Surface finish
- Mill finish
- Edge condition
- Mill edge; slit edge 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
EN 10084
Case hardening alloy steels
European reference for case hardening alloy steels with specified hardenability bands.
03
EN 10132
Cold-rolled narrow steel strip for heat treatment
European reference for cold-rolled narrow strip for quenching and tempering.
04
JIS G3311
Cold-rolled special steel strip
Japanese reference for cold-rolled special steel strip.
05
GB/T 3077
Alloy structural steels
Chinese reference for alloy structural steel hot-rolled bars and billets.
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.
Slitting & Edge Processing
Slitting, edge trimming and related processing according to required width and edge condition.
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.
Surface Finishing
Surface treatment and finishing according to product, specification and application requirements.
Surface Coating & Plating
Coating, plating and other surface protection treatments according to product and application requirements.
Forming
Bending, forming and other shape modification according to drawings or order 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 Coil
- Grade
- 4140
- Standard
- ASTM A506
- Dimensions
- Thickness 2.50 mm × Width 1500 mm × Coil ID 508 mm
- Condition
- Annealed; Pickled & Oiled; Mill Edge
- 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.
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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.
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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.
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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.
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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.
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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 the difference between 4140 and 42CrMo4 alloy coil?
4140 (ASTM) and 42CrMo4 / 1.7225 (EN) are direct equivalents with similar chromium-molybdenum chemistry. Both offer high hardenability and strength after quenching and tempering.
02 In what condition is alloy coil supplied?
Alloy coil is typically supplied in hot-rolled annealed or quenched and tempered condition depending on end-use requirement.
03 What are the typical end-uses for 4140 coil?
4140 coil is commonly used for automotive components, gears, shafts, springs, tool holders and high-strength fabricated parts.
04 Is heat treatment included in supply?
Mill supply is usually annealed or normalized. Final quenching and tempering is typically performed by the end-user to project-specific hardness.
05 What certificates accompany alloy coil?
EN 10204 3.1 mill test certificate with chemical composition and mechanical properties is standard. Ultrasonic testing and third-party inspection can be arranged.