Iron Sheet,Plate tension grade 65-45-12

Ductile Iron Sheet/Plate tension grade 65-45-12 Product Information -:- For detailed product information, please contact sales. -: Ductile Iron Sheet/Plate tension grade 65-45-12 Synonyms -:- For detailed product information, please contact sales. -:

Ductile Iron tension grade 65-45-12 Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Data Sheet: Ductile Iron – Tensile Grade 65-45-12 (Ferritic-Pearlitic)** --- #### **1. Product Overview** **Tensile Grade 65-45-12** is a **high-strength, ferritic-pearlitic ductile iron** defined by its guaranteed mechanical properties: **minimum 65 ksi (450 MPa) tensile strength, 45 ksi (310 MPa) yield strength, and 12% elongation**. This designation is the **industry-standard shorthand** for a material offering a superior balance of increased strength and retained ductility. Positioned between the highly ductile 60-40-18 and the stronger 80-55-06 grades, it provides an optimal compromise for a vast range of engineering applications requiring **robust load-bearing capacity, good fatigue resistance, and reliable toughness**. This grade is typically produced in the **as-cast or normalized condition**, resulting in a mixed microstructure that delivers excellent all-around performance and manufacturability. --- #### **2. Governing International Standards** This tensile grade is universally recognized and specified across global engineering standards. * **Primary Standard: ASTM A536** - *Standard Specification for Ductile Iron Castings*. Formally designated as **Grade 65-45-12**. * **Global Equivalents:** * **ISO 1083 / EN 1563:** **EN-GJS-500-7** (500 MPa tensile, 320 MPa yield, 7% elongation). *Note: This is the functional international equivalent, though the elongation value differs slightly. The performance profile is considered interchangeable in most industrial applications.* * **SAE J434c (Automotive):** **Grade D4512**. * **JIS G5502 (Japan):** **FCD500**. * **GB/T 1348 (China):** **QT500-7**. * **UNS Designation:** **F33100**. * **Key Referenced Testing Standards:** * **Tensile Test:** ASTM E8 / ISO 6892-1 * **Hardness:** ASTM E10 / ISO 6506 (Brinell) * **Microstructure:** ASTM A247 / ISO 945 --- #### **3. Typical Chemical Composition** Chemistry is balanced to achieve a controlled mix of ferrite and pearlite in the as-cast or normalized state. | Element | Target Range (%) | Functional Role | | :--- | :--- | :--- | | **Carbon (C)** | 3.5 - 3.8 | Ensures castability and graphite formation. | | **Silicon (Si)** | 2.2 - 2.6 | Solid solution strengthener and ferrite promoter. Level is balanced to achieve the target mixed matrix. | | **Manganese (Mn)** | **0.20 - 0.40** | **Key alloy for this grade.** Primary pearlite stabilizer. Controlled to develop the required pearlite content (typically 40-70%) without excessive segregation. | | **Phosphorus (P)** | **≤ 0.04** | Kept low to prevent embrittlement. | | **Sulfur (S)** | **≤ 0.015** | Kept very low. | | **Magnesium (Mg)** | 0.03 - 0.05 (Residual) | Essential for nodulization. | | **Copper (Cu)** | **0 - 0.30** | Optional. May be added in small amounts to promote more uniform pearlite distribution, especially in heavier sections. | | **Chromium (Cr)** | **≤ 0.10** | Strictly limited as a strong carbide former. | | **Molybdenum (Mo)** | ≤ 0.10 | Rarely added for standard sections. | --- #### **4. Physical & Mechanical Properties** This grade is defined by its robust, balanced property profile. | Property | Minimum Requirement / Typical Value | Standard & Significance | | :--- | :--- | :--- | | **Tensile Strength, min.** | **450 MPa (65,000 psi)** | ASTM A536 / ISO 1083 | | **Yield Strength (0.2% offset), min.** | **310 MPa (45,000 psi)** | Provides a high safety margin against permanent deformation. | | **Elongation, min.** | **12%** (in 2 inches / 50 mm) | **Substantial ductility**, providing important stress relief and resistance to brittle fracture under shock loads. | | **Hardness (Brinell)** | **170 - 207 HBW** | Guaranteed range ensures consistency, good wear resistance, and excellent machinability. | | **Modulus of Elasticity** | 165 - 172 GPa (24 - 25 x 10⁶ psi) | High stiffness. | | **Charpy Impact (Unnotched) @ 21°C** | **20 - 35 J (Typical)** | Good impact resistance for general engineering uses. | | **Fatigue Endurance Limit** | ~230 - 250 MPa (≈ 0.5-0.55 x UTS) | Good fatigue performance for cyclically loaded parts. | | **Density** | 7.1 - 7.2 g/cm³ (0.256 lb/in³) | | | **Typical Microstructure** | **Mixed Matrix** of **Pearlite (40-70%) and Ferrite**, with **Spheroidal Graphite** (Nodularity >80%, Types I & II). | The pearlite provides strength; the ferrite provides ductility and toughness. | --- #### **5. Product Applications** Tensile Grade 65-45-12 is an extremely versatile, general-purpose high-quality ductile iron used across numerous industries where strength and reliability are critical. * **Automotive & Trucking:** **Wheel hubs, brackets, suspension components (steering knuckles, carrier housings), turbocharger housings, and differential cases.** Balances strength with vibration damping. * **Agriculture & Construction Machinery:** **Tractor transmission cases, hydraulic valve blocks, gearbox housings, and implement components.** Withstands shock loads and cyclic stresses. * **Fluid Handling & Power:** **Pump housings, compressor bodies, valve bodies, and medium-duty cylinder blocks.** * **General Engineering & Industrial Machinery:** **Machine tool bases, press frames, rollers, drive sheaves, and heavy-duty gear blanks.** The go-to grade for robust, reliable cast components. * **Renewable Energy:** **Components for wind turbine gearboxes and housings** where a balance of properties is required. --- #### **6. Fabrication & Quality Notes** * **Condition:** Commonly supplied **as-cast** (achieved via chemistry and cooling control) or **normalized** for more consistent properties throughout the casting, especially for complex geometries. * **Machinability:** **Excellent.** Considered one of the most machinable grades of ductile iron due to its moderate hardness and favorable chip-breaking graphite structure. * **Weldability:** **Fair to Poor.** Standard precautions for ductile iron apply: high pre-heat (400-500°C), use of nickel-iron electrodes (e.g., ENiFe-CI), and controlled post-weld cooling with stress relief. Not intended for fabrication welding. * **Quality Assurance:** Standard practice involves testing **separately cast test bars**. Certifications include chemical analysis and mechanical test reports. --- #### **7. Ordering Information** **Specify:** **"Ductile Iron Castings, Tensile Grade 65-45-12 (ASTM A536 65-45-12), [As-Cast or Normalized Condition]."** **Essential Details to Provide:** * **Applicable Standard** (e.g., ASTM A536). * **Part Drawing & Specification.** * **Required Condition:** As-cast or Normalized (if a preference). * **Certification Requirements:** Mill Test Report (MTR) with chemistry, tensile properties, and hardness. * **Special Requirements:** Any need for impact testing, specific microstructure approval, or non-destructive testing (NDT). **Tensile Grade 65-45-12 is often considered the default choice for high-quality, general-engineering ductile iron components, offering an optimal balance of performance, castability, machinability, and cost-effectiveness.** -:- For detailed product information, please contact sales. -: Ductile Iron tension grade 65-45-12 Specification Dimensions Size： Diameter 20-1000 mm Length <6532 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. -: Ductile Iron tension grade 65-45-12 Properties -:- For detailed product information, please contact sales. -:

Applications of Ductile Iron Sheet,Plate tension grade 65-45-12 -:- For detailed product information, please contact sales. -: Chemical Identifiers Ductile Iron Sheet,Plate tension grade 65-45-12 -:- For detailed product information, please contact sales. -:

Packing of Ductile Iron Sheet/Plate tension grade 65-45-12 -:- 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 Sheet/Plate 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 3003 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