AISI M1025 Merchant Quality Carbon Steel Wire

AISI M1025 Merchant Quality Carbon Steel Wire, Composition Spec Product Information -:- For detailed product information, please contact sales. -: AISI M1025 Merchant Quality Carbon Steel Wire, Composition Spec Synonyms -:- For detailed product information, please contact sales. -:

AISI M1025 Merchant Quality Carbon Steel, Composition Spec Product Information -:- For detailed product information, please contact sales. -: # **Product Datasheet: AISI M1025 Merchant Quality Carbon Steel (Composition Specification)** ## **Product Overview** AISI M1025 (Merchant Quality) is a standard **low-to-medium carbon steel** specifically designated for general commercial applications where precise mechanical property guarantees are not the primary requirement. The **"M" prefix** denotes "Merchant Quality," indicating it is produced to standard commercial specifications rather than more stringent "Special Quality" or "Aircraft Quality" standards. This steel is characterized by its **balanced composition, good formability, weldability, and cost-effectiveness**, making it suitable for a wide range of non-critical structural and fabricating applications where the primary considerations are availability, workability, and economy rather than specific mechanical property minima. --- ## **1. Chemical Composition Specification (Weight %)** Merchant Quality steel typically has broader compositional ranges than special quality grades, accommodating standard steelmaking practices while maintaining essential performance characteristics. | Element | AISI Standard Range | Typical Merchant Quality Range | Metallurgical Function & Notes | |---------|---------------------|--------------------------------|--------------------------------| | **Carbon (C)** | 0.22 – 0.28 | 0.22 – 0.28 (aim: 0.25) | Primary strengthener; determines hardness and strength | | **Manganese (Mn)** | 0.30 – 0.60 | 0.30 – 0.60 | Enhances strength, hardenability, and hot workability | | **Phosphorus (P)** | ≤ 0.040 | 0.015 – 0.035 | Residual element; improves machinability but reduces ductility | | **Sulfur (S)** | ≤ 0.050 | 0.020 – 0.045 | Improves machinability; forms manganese sulfides | | **Silicon (Si)** | 0.15 – 0.35 (typical) | 0.15 – 0.35 | Deoxidizer; contributes to strength via solid solution | | **Iron (Fe)** | Balance | Balance | Base metal | | **Residual Elements** | Not specified | Varies by mill practice | Copper, nickel, chromium, etc. typically present in small amounts | **Key Composition Notes:** 1. **Carbon Control:** Typically aimed at the mid-range (0.25%) to balance strength and formability 2. **Sulfur-Phosphorus Balance:** Higher limits than special quality steels for improved machinability 3. **Residual Elements:** Not strictly controlled; may vary significantly between heats 4. **Deoxidation Practice:** Typically silicon-killed; aluminum may be used in minimal amounts --- ## **2. Typical Physical & Mechanical Properties** Properties are highly dependent on processing history (hot-rolled, cold-drawn, annealed, etc.) and section size. The following represents typical ranges for merchant quality material. ### **A. As-Hot-Rolled Condition (Most Common Merchant Form)** | Property | Typical Range | Variability Notes | |----------|---------------|-------------------| | **Ultimate Tensile Strength** | 400 – 500 MPa (58 – 73 ksi) | Can vary ±10% between heats | | **Yield Strength (Rp0.2)** | 230 – 340 MPa (33 – 49 ksi) | Minimum not guaranteed | | **Elongation (in 50 mm)** | 18 – 28% | Higher in smaller sections | | **Reduction of Area** | 40 – 55% | | | **Hardness** | 110 – 170 HB | Depends on cooling rate | | **Machinability** | 65 – 75% (relative to 1212) | Good with proper tooling | | **Modulus of Elasticity** | 190 – 210 GPa (27.5 – 30.5 × 10⁶ psi) | | ### **B. Physical Properties** | Property | Value | Conditions | |----------|-------|------------| | **Density** | 7.85 g/cm³ (0.284 lb/in³) | At 20°C | | **Melting Point** | ~1510 – 1530°C (2750 – 2786°F) | | | **Thermal Conductivity** | 49 – 53 W/m·K | At 20°C | | **Coefficient of Thermal Expansion** | 11.7 × 10⁻⁶/°C | 20–100°C range | | **Electrical Resistivity** | 0.17 – 0.20 μΩ·m | At 20°C | | **Specific Heat Capacity** | 470 – 490 J/kg·K | At 20°C | --- ## **3. Processing Characteristics** ### **A. Formability & Fabrication** - **Hot Working:** Excellent – easily forged, rolled, or extruded at 1150–900°C - **Cold Working:** Fair to good – may require intermediate annealing for severe deformation - **Machinability:** Good – sulfur content promotes chip breaking - **Weldability:** Very good – all common processes applicable; minimal pre-heat required for thin sections ### **B. Heat Treatment Response** - **Annealing:** Full annealing at 830–860°C produces maximum softness - **Normalizing:** 870–920°C followed by air cooling refines grain structure - **Case Hardening:** Suitable for carburizing (870–930°C) for surface hardness - **Through Hardening:** Can be quenched and tempered but limited by low hardenability --- ## **4. Typical Applications** AISI M1025 Merchant Quality is used in applications where cost-effectiveness and general performance outweigh the need for precise property guarantees. ### **Primary Application Categories:** | Industry Sector | Typical Applications | Rationale for Selection | |-----------------|---------------------|-------------------------| | **General Fabrication** | Brackets, frames, supports, welded structures | Cost-effective, readily available, easy to fabricate | | **Construction** | Non-critical structural elements, formwork, temporary supports | Good weldability, adequate strength | | **Agricultural** | Implements, tool handles, mounting brackets | Good formability, corrosion resistance with coating | | **Automotive (Non-critical)** | Brackets, mounts, non-structural components | Good balance of strength and formability | | **Hardware & Fasteners** | Common bolts, nuts, washers (after processing) | Good machinability and formability | | **Piping & Tubing** | Non-pressure applications, conduit, handrails | Good weldability and formability | ### **Specific Product Forms:** - Hot-rolled rounds, squares, flats, angles, channels - Cold-drawn rounds and hexagons (for improved finish) - Welded and seamless tubing (non-pressure) - Plate and sheet for fabrication --- ## **5. Conforming International Standards (Merchant Quality Equivalents)** Merchant Quality steels are covered by general commercial standards rather than specific material specifications. | Standard System | Standard Number | Equivalent Designation | Quality Level & Notes | |----------------|----------------|------------------------|----------------------| | **UNS/SAE/AISI** | G10250 | AISI M1025 | **Base specification** – "M" indicates Merchant Quality | | **ASTM (USA)** | **ASTM A575** | Grade M1025 | **Standard for Merchant Quality Bars** | | **ASTM** | ASTM A283 | Grade C/D | General structural steel plates | | **ASTM** | ASTM A36 | - | Structural steel (similar applications) | | **ISO (International)** | ISO 630-2 | Fe430B | Structural steels – quality class | | **EN (Europe)** | EN 10025-2 | S235JR | Non-alloy structural steel | | **JIS (Japan)** | JIS G3101 | SS330/SS400 | General structural steel | | **GB (China)** | GB/T 700 | Q235 | Carbon structural steel | | **DIN (Germany)** | DIN 17100 | RSt 37-2 | Structural steel, quality grade | --- ## **6. Quality Considerations & Limitations** ### **A. Key Advantages of Merchant Quality** 1. **Cost-Effective:** Lowest cost steel grade for general applications 2. **Wide Availability:** Readily available in standard sizes and forms 3. **Simplified Procurement:** Standard specifications reduce buying complexity 4. **Adequate Performance:** Suitable for many non-critical applications 5. **Good Fabricability:** Easily welded, formed, and machined ### **B. Limitations & Restrictions** 1. **Property Variability:** Mechanical properties can vary significantly between heats 2. **No Minimum Guarantees:** Yield and tensile strengths not guaranteed to minima 3. **Surface Quality:** May contain more imperfections than higher grades 4. **Internal Soundness:** Not subject to stringent internal quality requirements 5. **Limited Traceability:** Basic certification only (typically no full traceability) ### **C. When to Specify Merchant Quality:** - Non-critical structural applications - Components with generous safety factors - Prototype and development work - Temporary structures and fixtures - Cost-sensitive production where variability can be accommodated ### **D. When to Upgrade to Special Quality:** - Critical structural components - Applications with dynamic or impact loading - Components requiring precise machining - Applications with tight dimensional tolerances - Parts subject to heat treatment for specific properties --- ## **7. Supply & Procurement Information** ### **A. Standard Supply Conditions** - **Surface Condition:** As-rolled with mill scale (descaled optional) - **Tolerances:** Standard commercial tolerances - **Testing:** Typically supplied without mechanical test certification - **Certification:** Mill test report optional (may incur additional cost) ### **B. Ordering Information** **Typical Order Specification:** ``` Material: AISI M1025 Merchant Quality Specification: ASTM A575 Form: Round Bar (or other shape) Size: [Dimensions] Condition: As-rolled (or specified) Quantity: [Amount] ``` ### **C. Available Forms & Sizes** - **Rounds:** 6 mm to 150 mm diameter - **Squares:** 6 mm to 100 mm - **Flats:** Various thicknesses and widths - **Structural Shapes:** Angles, channels, beams in standard sizes --- ## **8. Comparison with Other Quality Levels** | Quality Aspect | Merchant Quality (M1025) | Special Quality (1025) | Aircraft Quality | |----------------|--------------------------|------------------------|------------------| | **Composition Control** | Standard ranges | Tighter control | Very tight control | | **Mechanical Properties** | Typical values only | Minimum values guaranteed | All properties guaranteed | | **Internal Soundness** | Standard practice | Improved practice | Stringent requirements | | **Surface Quality** | Commercial standards | Better surface control | Premium surface quality | | **Testing & Certification** | Basic chemical analysis | Full mechanical testing | Extensive testing | | **Traceability** | Heat number typically | Full heat traceability | Complete traceability | | **Cost Factor** | 1.0 (baseline) | 1.2 – 1.5× | 2.0 – 3.0× | --- ## **9. Technical Notes for Design & Application** ### **A. Design Considerations** 1. **Safety Factors:** Use higher safety factors (3–4×) due to property variability 2. **Stress Calculations:** Base on typical rather than minimum properties 3. **Fatigue Applications:** Avoid for critical fatigue-loaded components 4. **Impact Applications:** Limited suitability due to variable toughness ### **B. Fabrication Guidelines** 1. **Welding:** Use standard procedures; pre-heat for sections >25 mm 2. **Forming:** Anneal between severe forming operations 3. **Machining:** Allow for variable chip formation and tool wear 4. **Finishing:** Expect variable response to plating and coating ### **C. Quality Verification** - **Incoming Inspection:** Recommended for critical dimensions - **Periodic Testing:** Consider periodic mechanical testing for consistency - **Supplier Qualification:** Qualify suppliers based on historical performance --- ## **10. Environmental & Regulatory Considerations** ### **A. Compliance Status** - **RoHS Compliant:** Yes – contains no restricted substances - **REACH Compliant:** Yes – registered for standard uses - **Recyclability:** 100% recyclable without degradation ### **B. Industry Restrictions** - **Pressure Vessels:** Not permitted by ASME Boiler Code - **Aerospace:** Not permitted for flight-critical components - **Medical Devices:** Limited to non-implant applications - **Food Contact:** Requires appropriate surface treatment --- ## **11. Economic Analysis** ### **Cost Comparison (Relative to M1025 as Baseline)** | Material Option | Cost Factor | Typical Applications | |----------------|-------------|---------------------| | **AISI M1025** | 1.00 | General fabrication, non-critical structures | | **AISI 1025 (Special Quality)** | 1.20 – 1.40 | Machinery parts, automotive components | | **AISI 4140** | 1.80 – 2.20 | High-strength components, shafts | | **Stainless 304** | 3.50 – 4.50 | Corrosion-resistant applications | ### **Total Cost Considerations** - **Material Cost:** Lowest among engineering steels - **Fabrication Cost:** Standard rates apply - **Quality Cost:** Higher inspection may be needed - **Lifecycle Cost:** Suitable for non-critical, replaceable components --- **Final Technical Note:** AISI M1025 Merchant Quality represents the most economical entry point into carbon steel usage for general engineering applications. While it lacks the precise property guarantees of special quality steels, it offers excellent value for applications where its limitations can be accommodated through appropriate design, fabrication practices, and quality control measures. Its selection represents a balance between performance requirements and economic considerations. **Disclaimer:** This datasheet provides typical information for AISI M1025 Merchant Quality steel. Actual properties may vary between producers and heat lots. For critical applications, testing of actual material is recommended. Always consult with material engineers and review applicable codes and standards before specification. -:- For detailed product information, please contact sales. -: AISI M1025 Merchant Quality Carbon Steel, Composition Spec Specification Dimensions Size： Diameter 20-1000 mm Length <5495 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: AISI M1025 Merchant Quality Carbon Steel, Composition Spec Properties -:- For detailed product information, please contact sales. -:

Applications of AISI M1025 Merchant Quality Carbon Steel Wire, Composition Spec -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI M1025 Merchant Quality Carbon Steel Wire, Composition Spec -:- For detailed product information, please contact sales. -:

Packing of AISI M1025 Merchant Quality Carbon Steel Wire, Composition Spec -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Wire drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1966 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition