AISI 4130H Steel, water quenched

AISI 4130H Steel, water quenched 855°C (1570°F), 480°C (900°F) temper Product Information -:- For detailed product information, please contact sales. -: AISI 4130H Steel, water quenched 855°C (1570°F), 480°C (900°F) temper Synonyms -:- For detailed product information, please contact sales. -:

AISI 4130H Steel, water quenched 855°C (1570°F), 480°C (900°F) temper Product Information -:- For detailed product information, please contact sales. -: # **Technical Data Sheet: AISI 4130H Steel, Water Quenched & Tempered Condition** ## **Product Identification** **Designation:** AISI 4130H Steel, Hardenability-Guaranteed **Heat Treatment:** Water Quenched from 855°C (1570°F) & Tempered at 480°C (900°F) **Material Classification:** Chromium-Molybdenum Low-Alloy H-Steel **Condition State:** High-strength heat-treated condition with guaranteed hardenability --- ## **1. Chemical Composition (H-Steel Controlled)** AISI 4130H has controlled chemistry ranges to ensure consistent hardenability: | Element | H-Steel Range (%) | Standard 4130 Range (%) | Function in H-Steel | |---------|------------------|-------------------------|---------------------| | **Carbon (C)** | 0.28 - 0.33 | 0.28 - 0.33 | Primary strengthening; controlled for consistent response | | **Manganese (Mn)** | 0.40 - 0.70 | 0.40 - 0.60 | Major hardenability element; range expanded for band control | | **Silicon (Si)** | 0.15 - 0.35 | 0.15 - 0.35 | Deoxidizer; solid solution strengthener | | **Chromium (Cr)** | 0.80 - 1.10 | 0.80 - 1.10 | Enhances hardenability; critical for water quenching | | **Molybdenum (Mo)** | 0.15 - 0.25 | 0.15 - 0.25 | Improves hardenability; reduces temper embrittlement | | **Phosphorus (P)** | ≤ 0.025 | ≤ 0.035 | Tighter control for improved toughness | | **Sulfur (S)** | ≤ 0.025 | ≤ 0.040 | Tighter control for better transverse properties | | **Boron (B)** | Optional trace | - | May be added for enhanced hardenability | **Key H-Steel Characteristic:** Composition is adjusted within these ranges to achieve specified Jominy hardenability bands per SAE J1268. --- ## **2. Heat Treatment Process Specification** ### **Water Quenching Parameters:** - **Austenitizing Temperature:** 855°C (1570°F) ± 10°C - **Soaking Time:** 20-30 minutes per inch of thickness - **Quenching Medium:** Water at 20-30°C (68-86°F) - **Agitation:** Vigorous to break vapor blanket - **Transfer Time:** < 10 seconds from furnace to quench bath ### **Tempering Process:** - **Tempering Temperature:** 480°C (900°F) ± 10°C - **Holding Time:** 1-2 hours per inch of thickness (minimum 1 hour) - **Cooling Method:** Air cooling to room temperature - **Avoidance Range:** Process avoids 350-400°C temper embrittlement zone ### **Resulting Microstructure:** - **Primary Structure:** Tempered martensite with fine alloy carbides - **Carbide Types:** Mo₂C and Cr₇C₃ carbides dispersed in ferrite matrix - **Prior Austenite Grain Size:** ASTM 6-8 (fine grain structure) - **Hardness Uniformity:** Minimal gradient due to guaranteed hardenability ### **Hardenability Band Compliance:** - **Jominy Test Per:** SAE J1268 standards - **Band Designation:** Specific H-band certified by producer - **Test Certification:** Each lot supplied with hardenability curve - **Consistency:** ±3 HRC at any Jominy distance within certified band --- ## **3. Physical Properties** | Property | Value | Conditions | Test Standard | |----------|-------|------------|---------------| | **Density** | 7.85 g/cm³ | 20°C | ASTM E1268 | | **Melting Range** | 1427-1510°C | - | - | | **Modulus of Elasticity** | 205 GPa | 20°C | ASTM E111 | | **Shear Modulus** | 80 GPa | 20°C | ASTM E143 | | **Poisson's Ratio** | 0.29 | 20°C | ASTM E132 | | **Thermal Conductivity** | 40.5 W/m·K | 100°C | ASTM E1225 | | **Specific Heat Capacity** | 480 J/kg·K | 20°C | ASTM E1269 | | **Coefficient of Thermal Expansion** | 12.5 × 10⁻⁶/°C | 20-400°C | ASTM E228 | | **Electrical Resistivity** | 0.25 μΩ·m | 20°C | ASTM B193 | --- ## **4. Mechanical Properties** ### **Guaranteed Minimum Properties:** | Property | Minimum Value | Typical Range | Test Standard | |----------|---------------|---------------|---------------| | **Hardness** | 36 HRC | 36-40 HRC | ASTM E18 | | **Tensile Strength** | 1100 MPa | 1100-1250 MPa | ASTM A370 | | **Yield Strength (0.2%)** | 950 MPa | 950-1100 MPa | ASTM A370 | | **Elongation (50mm)** | 12% | 12-16% | ASTM A370 | | **Reduction of Area** | 45% | 45-55% | ASTM A370 | | **Impact Energy (CVN @ 21°C)** | 27 J | 27-40 J | ASTM E23 | | **Impact Energy (CVN @ -40°C)** | 20 J | 20-30 J | ASTM E23 | ### **Section Size Performance (Based on H-Band):** | Diameter | Surface Hardness | Core Hardness | Strength Uniformity | |----------|------------------|---------------|---------------------| | **25 mm (1")** | 38-40 HRC | 38-40 HRC | Excellent | | **50 mm (2")** | 38-40 HRC | 36-38 HRC | Very Good | | **75 mm (3")** | 37-39 HRC | 35-37 HRC | Good | | **100 mm (4")** | 36-38 HRC | 34-36 HRC | Acceptable | ### **Fatigue Properties:** - **Endurance Limit:** 450-500 MPa (R = -1, 10⁷ cycles) - **Fatigue Ratio:** 0.40-0.45 - **Notch Sensitivity:** Moderate (q ≈ 0.85) - **Surface Sensitivity:** High - surface finish critical for fatigue performance --- ## **5. Manufacturing & Processing Characteristics** ### **Machinability in Heat-Treated State:** - **Machinability Rating:** 40-50% (compared to annealed carbon steel) - **Recommended Tools:** Carbide or ceramic with positive rake - **Cutting Speed:** 50-80 m/min (150-250 SFM) for carbide tools - **Coolant Requirement:** Essential for tool life and surface finish - **Chip Formation:** Short, broken chips typical ### **Weldability Considerations:** - **Weldability Rating:** Fair (requires precautions) - **Preheat Required:** 200-250°C for all thicknesses - **Interpass Temperature:** 250°C maximum - **Post-Weld Heat Treatment:** Mandatory - re-temper at 480°C minimum - **Filler Metals:** AWS A5.28 ER90S-B3 or similar ### **Grinding Characteristics:** - **Grindability:** Good with proper wheels - **Surface Finish:** Can achieve 0.8 μm Ra (32 μin) with precision grinding - **Grinding Burns:** Risk of re-tempering - use adequate coolant - **Stress Relief:** May be required after heavy grinding --- ## **6. Product Applications** ### **Aerospace & Defense:** - **High-strength landing gear components** - **Helicopter rotor hubs and drive shafts** - **Missile launch tubes and motor cases** - **Aircraft engine mounts and brackets** - **Specific:** F-16 landing gear components ### **Oil & Gas Industry:** - **High-pressure drill collars** - **Tool joints for severe service** - **Wellhead equipment components** - **Subsea connector parts** - **API Spec 7-1 applications** ### **Power Generation:** - **Turbine rotor discs and shafts** - **High-pressure bolting (ASTM A193 B7M)** - **Valve stems for high-temperature service** - **Generator retaining rings** ### **Heavy Equipment:** - **Track links for mining equipment** - **High-strength axle shafts** - **Crane boom components** - **Excavator bucket pins and bushings** ### **Automotive Racing:** - **High-performance suspension components** - **Racing crankshafts and connecting rods** - **Transmission gears for drag racing** - **NHRA/FIA approved safety components** --- ## **7. International Standards & Specifications** ### **Base Material Standards:** | Standard | Designation | Title | Notes | |----------|-------------|-------|-------| | **SAE International** | SAE J1268 | Hardenability Bands for H-Steels | Primary H-steel standard | | **ASTM International** | ASTM A304 | H-Steel Bars | Material specification | | **Aerospace (SAE)** | AMS 6359 | Steel Bars, Alloy | Aerospace H-steel | | **UNS Number** | H41300 | Unified Numbering System | | | **API Specification** | API Spec 7-1 | Drill Collar Specification | Oilfield application | ### **Heat Treatment Standards:** - **AMS 2759:** Pyrometry for Heat Treatment - **ASTM A988:** Heat Treatment of Steel for Pressure Components - **NADCAP:** Aerospace heat treatment requirements ### **Global Equivalents:** | Country/Region | Standard | Equivalent Grade | H-Steel Designation | |----------------|----------|------------------|---------------------| | **European Union** | EN 10083-3 | 25CrMo4+H | 1.7218+H | | **Germany** | DIN 17200 | 25CrMo4+H | | | **Japan** | JIS G4052 | SCM430H | Hardenability guaranteed | | **China** | GB/T 5216 | 30CrMoH | | | **International** | ISO 683-18 | 25CrMo4+H | | ### **Testing & Certification Standards:** - **SAE J407:** Hardenability Tests - **ASTM A255:** End-Quench Test for Hardenability - **ASTM E45:** Inclusion Content Assessment --- ## **8. Quality Assurance & Testing** ### **Mandatory Testing for H-Steel:** 1. **Chemical Analysis:** Ladle and product analysis for each heat 2. **Jominy Hardenability Test:** Each heat tested per SAE J1268 3. **Hardness Verification:** Multiple points across section 4. **Tensile Testing:** Longitudinal and transverse properties 5. **Impact Testing:** At specified temperatures ### **Hardenability Certification:** - **Jominy Curve:** Certified minimum and maximum hardness values - **Band Compliance:** Verification against ordered H-band - **Lot Traceability:** Complete traceability to original test data - **Heat Treatment Validation:** Documentation of actual process parameters ### **Non-Destructive Testing Options:** - **Ultrasonic Testing:** 100% volume examination per ASTM A388 - **Magnetic Particle:** Surface examination per ASTM E709 - **Eddy Current:** For surface and near-surface defects - **Radiography:** For critical applications --- ## **9. Design Considerations** ### **Advantages of 4130H vs. Standard 4130:** 1. **Predictable Properties:** Guaranteed hardenability ensures consistency 2. **Reduced Scrap:** Lower rejection rates in heat treatment 3. **Optimized Design:** Can design to tighter property margins 4. **Batch Consistency:** Minimal lot-to-lot variation 5. **Certified Performance:** Documentation provides design assurance ### **Design Guidelines:** - **Stress Concentrations:** Use generous fillet radii (min R = 3mm) - **Surface Finish:** Critical for fatigue - specify ≤ 1.6 μm Ra for dynamic loads - **Section Transitions:** Gradual changes to minimize stress concentrations - **Thread Design:** Use fine threads (UNF/UNJF) rather than coarse threads ### **Safety Factors Recommended:** - **Static Loading:** 1.5-2.0 - **Fatigue Loading:** 2.5-3.5 (depending on surface finish) - **Impact Loading:** 3.0-4.0 - **Critical Applications:** Additional testing and higher factors --- ## **10. Technical Comparison** ### **vs. Standard 4130 Same Heat Treatment:** | Parameter | 4130H | Standard 4130 | Advantage | |-----------|-------|---------------|-----------| | **Hardness Uniformity** | ±2 HRC | ±5 HRC | Better consistency | | **Core Properties** | Predictable | Variable | Reliable design | | **Heat Treatment Yield** | >95% | 85-90% | Lower cost | | **Lot-to-Lot Variation** | Minimal | Significant | Better production control | ### **vs. Other Quench Media:** | Quench Medium | Hardness (HRC) | Distortion | Applications | |---------------|----------------|------------|-------------| | **Water** | 36-40 | High | Large sections, max strength | | **Oil** | 32-36 | Medium | Complex shapes | | **Polymer** | 30-34 | Low | Minimal distortion required | --- ## **11. Storage & Handling** ### **Special Considerations:** - **Surface Protection:** High hardness makes surface damage more critical - **Storage Conditions:** Dry environment to prevent corrosion - **Handling Equipment:** Use non-marring tools and surfaces - **Identification:** Clearly mark heat numbers and H-band information ### **Corrosion Protection:** - **Temporary:** Oil or rust preventive coatings - **Permanent:** Plating or coating systems compatible with service temperature - **Avoid:** Hydrogen embrittlement from certain plating processes --- ## **12. Limitations & Special Notes** ### **Technical Limitations:** 1. **Maximum Service Temperature:** 400°C (750°F) continuous 2. **Wear Resistance:** May require surface hardening for severe wear 3. **Corrosion Resistance:** Limited - requires protection in corrosive environments 4. **Notch Sensitivity:** Moderate - avoid sharp notches in design ### **Processing Limitations:** - **Re-heat Treatment:** Possible but requires careful control - **Repair Welding:** Difficult - requires full re-heat treatment - **Cold Working:** Not recommended in heat-treated state - **Joining Methods:** Best with mechanical fastening rather than welding --- ## **13. Supply Information** ### **Available Forms:** - **Rounds:** 20-150 mm diameter - **Forgings:** Custom shapes to 500 kg - **Billets:** For subsequent machining - **Condition:** Rough machined + heat treated or finished machined ### **Certification Requirements:** - **Material Test Report:** Including chemical and Jominy data - **Heat Treatment Certificate:** With actual time-temperature records - **Non-Destructive Test Reports:** As specified - **Traceability:** Complete from melt to final product ### **Lead Times:** - **Standard:** 10-14 weeks for certified material - **Expedited:** Available at premium - **Minimum Order:** 1000 kg for custom H-band material --- ## **14. Safety & Environmental** ### **Processing Safety:** - **Heat Treatment:** Follow furnace and quenching safety procedures - **Machining:** Use appropriate guards and dust collection - **Handling:** Wear protective equipment for sharp edges ### **Environmental Compliance:** - **Recyclable:** 100% as alloy steel scrap - **Processing Wastes:** Quench water may require treatment - **Disposal:** Scrap metal recycling preferred --- ## **15. Technical Support** ### **Engineering Assistance Available:** - **H-Band Selection:** Help choosing optimal hardenability band - **Heat Treatment Optimization:** Process parameter recommendations - **Failure Analysis:** Metallurgical investigation services - **Application Engineering:** Assistance with material selection ### **Testing Services:** - **Metallurgical Testing:** Full laboratory capabilities - **Non-Destructive Testing:** All standard methods - **Performance Testing:** Fatigue, wear, and corrosion testing - **Certification:** Third-party certification available --- ## **16. Disclaimer** This technical data sheet provides typical information for AISI 4130H steel in the water quenched and tempered condition. Actual properties are guaranteed only within the certified hardenability band for each specific heat of material. For critical applications, users should: 1. Review certified test reports for the specific material lot 2. Conduct application-specific testing 3. Consult with qualified metallurgical engineers The information contained herein is based on typical production experience and standard testing. It is provided without warranty, and the supplier shall not be liable for any damages arising from its use. **For specific guaranteed properties, request certified test reports for your material lot.** --- **End of Technical Data Sheet** -:- For detailed product information, please contact sales. -: AISI 4130H Steel, water quenched 855°C (1570°F), 480°C (900°F) temper Specification Dimensions Size： Diameter 20-1000 mm Length <6198 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 4130H Steel, water quenched 855°C (1570°F), 480°C (900°F) temper Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 4130H Steel, water quenched 855°C (1570°F), 480°C (900°F) temper -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 4130H Steel, water quenched 855°C (1570°F), 480°C (900°F) temper -:- For detailed product information, please contact sales. -:

Packing of AISI 4130H Steel, water quenched 855°C (1570°F), 480°C (900°F) temper -:- 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 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 2669 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