Schmolz + Bickenbach,P-20 Modified Plastic Mold Steel Rod/Bar

Schmolz + Bickenbach P-20 Modified Plastic Mold Steel Rod Product Information -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach P-20 Modified Plastic Mold Steel Rod Synonyms -:- For detailed product information, please contact sales. -:

Schmolz + Bickenbach P-20 Modified Plastic Mold Steel Product Information -:- For detailed product information, please contact sales. -: # **SCHMOLZ + BICKENBACH Formadur® P-20 Modified Series | Premium Modified Plastic Mold Steels** ## **Overview** SCHMOLZ + BICKENBACH **P-20 Modified** series represents an advanced family of plastic mold steels that significantly enhance the capabilities of the classic AISI P20 grade through precise metallurgical modifications. These grades are engineered to overcome the limitations of standard P20, offering superior performance in **polishability, toughness, hardenability consistency, and machinability**. By carefully balancing alloying elements like Nickel, Chromium, and Molybdenum, and employing advanced melting practices (often ESR or VAR), the P-20 Modified variants deliver exceptional homogeneity and reliability for demanding plastic injection mold applications where standard P20 may fall short. ## **Key Modified Grades & Selection Rationale** | Grade Designation | Key Modification | Primary Advantage | Target Hardness (Pre-hardened) | |-------------------|------------------|-------------------|--------------------------------| | **Formadur® 2311** | Nickel Addition (0.9-1.2%) | Enhanced Toughness & Hardenability | 30-34 HRC | | **Formadur® 2316** | Increased Chromium (16%) | Superior Corrosion Resistance | 29-33 HRC | | **Formadur® 2083** | Higher Chromium (13%) | Good Corrosion Resistance, Polishability | 30-34 HRC | | **Formadur® 2738** | Nickel Addition (1.0%) for Large Sections | Superior Through-Hardenability in Thick Blocks | 29-33 HRC | --- ## **Detailed Technical Specifications** ### **1. Comparative Chemical Composition (wt%)** | Element | Formadur® 2311 (P20+Ni) | Formadur® 2316 (Corr.Res.) | Formadur® 2083 | Formadur® 2738 (Heavy Section) | Function of Modification | |---------|--------------------------|----------------------------|----------------|--------------------------------|--------------------------| | **C** | 0.33-0.41 | 0.33-0.40 | 0.36-0.42 | 0.35-0.40 | Strength, Hardness | | **Si** | 0.20-0.40 | ≤0.40 | ≤0.40 | ≤0.40 | Deoxidizer | | **Mn** | 1.30-1.60 | 1.40-1.60 | ≤1.00 | 1.40-1.60 | Hardenability | | **Cr** | 1.80-2.10 | **15.0-17.0** | **12.5-13.5** | 1.80-2.10 | **Corrosion Resistance** | | **Mo** | 0.15-0.25 | 1.00-1.30 | 0.15-0.25 | 0.15-0.30 | Strength, Toughness | | **Ni** | **0.90-1.20** | - | - | **0.90-1.20** | **Toughness, Hardenability** | | **V** | - | - | - | - | - | | **S** | ≤0.005 | ≤0.005 | ≤0.005 | ≤0.003 | Polishability | | **P** | ≤0.015 | ≤0.025 | ≤0.025 | ≤0.015 | Toughness | **Metallurgical Rationale for Modifications:** - **Nickel Addition (2311/2738):** Enhances core toughness, improves hardenability penetration in thick sections, and promotes microstructural homogeneity. - **High Chromium (2316/2083):** Forms a passive chromium oxide layer for corrosion resistance against acidic/water-containing plastics (PVC, flame-retardant grades). - **Low Sulfur:** All modified grades maintain ultra-low sulfur for optimal polishability and isotropic properties. - **Molybdenum Adjustment:** Fine-tuned for optimal hardenability without compromising machinability. ### **2. Physical & Mechanical Properties** #### **Pre-hardened Delivery Properties:** | Property | 2311 | 2316 | 2083 | 2738 | Test Standard | |----------|------|------|------|------|---------------| | **Typical Hardness** | 300-340 HB (30-34 HRC) | 290-330 HB (29-33 HRC) | 300-340 HB (30-34 HRC) | 290-330 HB (29-33 HRC) | ISO 6506 | | **Tensile Strength** | 1000-1150 MPa | 950-1100 MPa | 1000-1150 MPa | 1000-1150 MPa | ISO 6892-1 | | **Yield Strength (0.2%)** | 850-950 MPa | 800-900 MPa | 850-950 MPa | 850-950 MPa | ISO 6892-1 | | **Elongation A₅** | ≥12% | ≥12% | ≥12% | ≥14% | ISO 6892-1 | | **Impact Toughness** | ≥40 J | ≥25 J | ≥20 J | ≥40 J | ISO 148-1 | | **Modulus of Elasticity** | 210 GPa | 210 GPa | 210 GPa | 210 GPa | ISO 6892-1 | #### **Through-Hardening Capability:** | Grade | Max Section for 50 HRC | Recommended Quenching Medium | Tempering Range | |-------|-------------------------|-------------------------------|-----------------| | 2311 | ~400 mm | Oil/Air | 500-600°C | | 2316 | ~300 mm | Oil/Air | 500-600°C | | 2083 | ~250 mm | Oil | 500-550°C | | 2738 | **>600 mm** | Oil/Air | 500-600°C | ### **3. Specialized Performance Characteristics** #### **Corrosion Resistance (Relative Comparison):** | Environment | 2311 | 2316 | 2083 | Notes | |-------------|------|------|------|-------| | **Humid Atmosphere** | 3 | 1 | 2 | 1=Best, 5=Worst | | **PVC Processing** | 4 | 1 | 2 | Chlorine corrosion | | **Flame-Retardant Plastics** | 4 | 1 | 2-3 | Bromine compounds | | **Acid Condensates** | 4 | 1-2 | 3 | Cooling water issues | #### **Surface Finish Capability:** | Grade | Maximum Achievable Polish | Texture Etching | EDM Finish | |-------|---------------------------|-----------------|------------| | **2311** | SPI A1 (Optical) | Excellent | Excellent | | **2316** | SPI A2-B1 | Very Good | Very Good | | **2083** | SPI A2-B1 | Very Good | Good | | **2738** | SPI A2-B1 | Very Good | Excellent | #### **Machinability Index (vs. Standard P20=100%):** | Operation | 2311 | 2316 | 2083 | 2738 | |-----------|------|------|------|------| | **Turning** | 95% | 85% | 90% | 95% | | **Milling** | 90% | 80% | 85% | 90% | | **Drilling** | 90% | 80% | 85% | 90% | | **EDM** | 100% | 95% | 95% | 100% | ### **4. Thermal & Physical Properties** | Property | All P-20 Modified Grades | Application Significance | |----------|--------------------------|--------------------------| | **Thermal Conductivity** | 35-38 W/m·K | Heat extraction from mold | | **Coefficient of Expansion** | 11.0-12.0 ×10⁻⁶/K | Dimensional stability | | **Specific Heat** | 460-480 J/kg·K | Thermal mass consideration | | **Density** | 7.85-7.87 g/cm³ | Weight calculation | --- ## **International Standards & Equivalents** ### **Standard Designations:** | Grade | DIN/EN | AISI/ASTM | UNS | JIS | GB | |-------|--------|-----------|-----|-----|----| | **2311** | 1.2311 | P20+Ni (Mod) | - | PX5 | 3Cr2NiMo* | | **2316** | 1.2316 | 420 Mod | S42000 | SUS420J2 | 4Cr13 | | **2083** | 1.2083 | 420 | S42000 | SUS420J2 | 4Cr13 | | **2738** | 1.2738 | P20+Ni | - | PX5 | 3Cr2NiMo | ### **Competitor Equivalents:** - **Uddeholm:** IMPAX® Supreme (2311), STAVAX® (2316), RAMAX® (2083) - **Böhler:** M201 (2311), M310 (2316), M300 (2738) - **ThyssenKrupp:** GS-311 (2311), GS-316 (2316) - **Daido:** NAK 80 (similar to 2311), HPM 38 (similar to 2316) --- ## **Application Guidelines** ### **Grade Selection Matrix:** | Application Requirement | Primary Choice | Alternative | Why This Selection | |------------------------|----------------|-------------|-------------------| | **General Purpose, High Polish** | **2311** | 2738 | Best polish/toughness balance | | **Corrosive Plastics (PVC, FR)** | **2316** | 2083 | Maximum corrosion resistance | | **Large Mold Blocks (>400mm)** | **2738** | 2311 | Superior through-hardening | | **Food/Medical Molds** | **2316** | 2311 | Corrosion resistance, cleanability | | **Optical Lenses/Displays** | **2311** | - | Best polishability | | **High-Volume Production** | 2311/2738 | - | Good wear resistance with nitride | ### **Specific Component Applications:** 1. **Cavity & Core Inserts:** All grades suitable based on requirements 2. **Mold Bases:** Primarily 2738 for large bases, 2311 for standard 3. **Hot Runner Components:** 2316 for corrosion resistance 4. **Ejector Sleeves/Pins:** 2311 or 2316 based on plastic 5. **Slider/Lifter Components:** 2311 for toughness ### **Processing Recommendations:** - **Machining:** Use carbide tools, moderate speeds, adequate coolant - **Heat Treatment:** Stress relieve at 550-600°C after rough machining - **Polishing:** Progress through 400-1200 grit, then diamond compound - **Surface Treatment:** Nitriding recommended for wear resistance (except 2316 may require special parameters) --- ## **Quality & Supply Specifications** ### **Available Forms & Conditions:** - **Pre-hardened Blocks:** Up to 3000×1500×800 mm - **Pre-machined Plates:** Precision ground surfaces - **Forged Blocks:** For optimal grain flow in critical components - **Special Shapes:** Custom forged near-net shapes ### **Quality Assurance:** - **Ultrasonic Testing:** Standard for sections >200 mm - **Hardness Uniformity:** Guaranteed within 30 HB through section - **Macro-Cleanliness:** Per SEP 1927, typically class e/e - **Certification:** EN 10204 3.2 with full traceability ### **Special Processing Options:** 1. **ESR (ElectroSlag Remelting):** For highest homogeneity 2. **VAR (Vacuum Arc Remelting):** For critical optical applications 3. **Precision Blanks:** Machined to customer drawings 4. **Stress-Relieving Service:** Pre-machined stability --- ## **Economic & Technical Advantages** ### **Advantages Over Standard P20:** | Aspect | Improvement | Benefit | |--------|-------------|---------| | **Polishability** | 30-50% better | Higher quality surfaces, reduced polishing time | | **Toughness** | 20-40% higher | Reduced risk of cracking, longer mold life | | **Hardenability** | More consistent | Uniform properties in thick sections | | **Corrosion Resistance** | 2316: 5-10× better | Suitable for corrosive plastics | | **Machining Stability** | Better dimensional control | Tighter tolerances, less rework | ### **Total Cost Considerations:** - **Initial Cost:** 20-40% premium over standard P20 - **Tool Life Improvement:** 15-30% longer production runs - **Polish Time Reduction:** 20-40% time savings - **Scrap Rate Reduction:** Lower due to better predictability - **ROI Period:** Typically 3-6 months in production --- **Disclaimer:** This technical overview is based on typical SCHMOLZ + BICKENBACH P-20 Modified grade properties. Specific applications require consultation with technical experts. Properties may vary within specified ranges and are influenced by processing conditions, section size, and heat treatment. Always refer to the latest manufacturer specifications and conduct appropriate testing for critical applications. The selection of mold steel must consider the specific plastic material, production volume, part geometry, surface finish requirements, and maintenance considerations. Performance data are indicative and should be verified for specific operating conditions. -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach P-20 Modified Plastic Mold Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7122 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. -: Schmolz + Bickenbach P-20 Modified Plastic Mold Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Schmolz + Bickenbach P-20 Modified Plastic Mold Steel Rod -:- For detailed product information, please contact sales. -: Chemical Identifiers Schmolz + Bickenbach P-20 Modified Plastic Mold Steel Rod -:- For detailed product information, please contact sales. -:

Packing of Schmolz + Bickenbach P-20 Modified Plastic Mold Steel Rod -:- 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 Rod 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 3593 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