AISI 1335H Steel Tube,Pipe

AISI 1335H Steel Tube Product Information -:- For detailed product information, please contact sales. -: AISI 1335H Steel Tube Synonyms -:- For detailed product information, please contact sales. -:

AISI 1335H Steel Product Information -:- For detailed product information, please contact sales. -: # Product Introduction: AISI 1335H Hardenability-Controlled Alloy Steel ## Overview **AISI 1335H** is the hardenability-controlled version of standard AISI 1335 medium-carbon manganese alloy steel. The "H" designation indicates this material is produced with guaranteed hardenability limits as determined by end-quench (Jominy) testing. This steel offers superior predictability in heat treatment response, ensuring consistent mechanical properties through the cross-section of parts, particularly in mass production environments where heat treatment uniformity is critical. ## 1. Chemical Composition The chemical composition of AISI 1335H features broader ranges for key elements compared to standard 1335, allowing manufacturers to achieve the specified hardenability band while maintaining production flexibility. | Element | Content Range (% by weight) - AISI 1335H | |---------|------------------------------------------| | **Carbon (C)** | 0.32 - 0.38 | | **Manganese (Mn)** | 1.35 - 2.05 | | **Phosphorus (P)** | 0.035 max | | **Sulfur (S)** | 0.040 max | | **Silicon (Si)** | 0.15 - 0.35 | | **Iron (Fe)** | Balance | **Note on H-Steel Chemistry:** Unlike standard grades with fixed composition limits, 1335H allows controlled variation in carbon and manganese content to achieve specific hardenability characteristics. This means different heats of 1335H may have different chemical analyses but will produce identical hardenability responses when properly heat treated. ## 2. Physical & Mechanical Properties ### A. Physical Properties (Approximate) - **Density:** 7.85 g/cm³ (0.284 lb/in³) - **Elastic Modulus:** 190-210 GPa (29,000-30,500 ksi) - **Poisson's Ratio:** 0.29 - **Thermal Conductivity:** 46.6 W/m·K at 100°C - **Specific Heat Capacity:** 470 J/kg·K at 100°C - **Coefficient of Thermal Expansion:** 11.5 × 10⁻⁶/°C (20-100°C) ### B. Mechanical Properties (After Quenching & Tempering) *Properties vary with tempering temperature; values shown represent typical ranges for properly heat-treated material.* | Property | Typical Range | Comments | |----------|---------------|----------| | **Tensile Strength** | 750 - 1050 MPa (109,000 - 152,000 psi) | Higher than standard 1335 due to guaranteed hardenability | | **Yield Strength** | 600 - 900 MPa (87,000 - 130,000 psi) | Excellent yield-to-tensile ratio (typically 0.85-0.90) | | **Elongation (in 50mm)** | 14% - 20% | Maintains good ductility at high strength levels | | **Reduction in Area** | 35% - 50% | | | **Hardness (Brinell)** | 220 - 360 HB | Typically tempered to 250-320 HB for optimal balance | | **Impact Toughness (Charpy V-Notch)** | 20 - 40 J (15 - 30 ft·lb) at room temperature | Highly dependent on tempering temperature | **Hardenability Characteristics:** AISI 1335H is supplied with guaranteed minimum and maximum hardness values at specified distances from the quenched end in a standard Jominy test. This ensures: - Consistent through-hardening in specified section sizes - Predictable core properties in large diameters - Reduced heat treatment distortion and cracking ## 3. International Standards & Equivalent Grades | Standard/Country | Equivalent Designation | Specification/Note | |------------------|-----------------------|---------------------| | **SAE (USA)** | **SAE 1335H** | SAE J1268 (Hardenability Bands) | | **ASTM (USA)** | **ASTM A304** | For bars subject to end-quench hardenability requirements | | **UNS** | **H13350** | Unified Numbering System | | **ISO** | **- (See Note)** | ISO 683-18 provides hardenability steel classification system | | **DIN (Germany)** | **- (See Note)** | No direct equivalent; 36Mn6 (1.5066) is compositionally similar | | **EN (Europe)** | **- (See Note)** | European equivalents focus on composition rather than H-bands | | **JIS (Japan)** | **- (See Note)** | SMn438 is similar but without guaranteed hardenability | **Important Note:** The "H" designation and hardenability band system are primarily North American practices. International equivalents typically specify chemical composition and mechanical properties but do not directly replicate the hardenability band concept of AISI/SAE H-steels. ## 4. Product Applications AISI 1335H is supplied in various forms including **hot-rolled bars, cold-drawn bars, forging stock, and billets**. Its primary advantage over standard 1335 is predictable performance in heat treatment, making it ideal for critical applications. ### Key Industry Applications: #### **Automotive & Heavy Vehicles** - **Drive Train Components:** Axle shafts, transmission shafts, drive shafts - **Suspension Parts:** King pins, steering arms, spindle bolts - **Engine Components:** Camshafts, crankshafts (medium-duty), connecting rods - **Fasteners:** High-strength bolts (Grade 10.9 equivalent), wheel studs #### **Industrial Machinery & Equipment** - **Gear Manufacturing:** Medium-sized gears, pinions, splined shafts - **Hydraulic Components:** Cylinder rods, piston rods, hydraulic motor shafts - **Agricultural Machinery:** Tractor transmission parts, implement shafts, gearbox components - **Material Handling:** Forklift mast components, roller shafts #### **Oil & Gas Industry** - **Drilling Equipment:** Non-magnetic drill collar components (when specified) - **Valve Components:** Stem shafts, gate valve parts - **Pump Shafts:** For centrifugal and reciprocating pumps #### **Special Applications** - **High-Strength Fasteners:** Where consistent heat treatment response is critical - **Forged Components:** That require uniform properties through thick sections - **Machined Parts:** Requiring predictable dimensional stability during heat treatment ## 5. Heat Treatment Characteristics ### Standard Heat Treatment Cycle: 1. **Austenitizing:** 830-850°C (1525-1560°F), holding time 1 hour per inch of thickness minimum 2. **Quenching:** Oil quench preferred (good hardenability allows slower quench rates) 3. **Tempering:** 400-600°C (750-1110°F), depending on desired hardness/toughness balance ### Hardenability Band Performance: The guaranteed hardenability ensures that for a given bar diameter: - Surface hardness after quenching will fall within specified limits - Core hardness will be predictable and consistent - Mechanical properties will be uniform across production lots ## 6. Fabrication Characteristics ### **Machinability:** - **Annealed Condition:** 65% of B1112 (approximately 160 HB hardness) - Cold drawing improves machinability and surface finish - Recommended cutting speeds: 60-90 SFM for turning operations - Use positive rake angles and adequate coolant for best results ### **Weldability:** **Rating: Fair (requires precautions)** - **Preheat Required:** 200-300°C (400-570°F) depending on section thickness - **Post-Weld Heat Treatment:** Mandatory - stress relieve at 595-650°C (1100-1200°F) immediately after welding - **Welding Processes:** SMAW with low-hydrogen electrodes, GTAW, or GMAW with appropriate filler metals - **Filler Metal Selection:** Typically AWS E11018 or equivalent high-strength low-alloy electrode ### **Forging:** - **Forging Temperature Range:** 1150-900°C (2100-1650°F) - Good forgeability with proper temperature control - Must be cooled slowly after forging to prevent cracking ## 7. Quality Assurance & Testing AISI 1335H material is typically supplied with: - **Hardenability Report:** Certified Jominy curve showing actual test results - **Chemical Analysis:** Heat analysis and product check analysis - **Mechanical Properties:** When specified, tensile tests from representative samples - **Non-Destructive Testing:** Ultrasonic or magnetic particle inspection available as specified ## Summary **AISI 1335H** represents the premium, consistency-focused variant of the 1335 alloy steel family. By specifying the "H" grade, manufacturers gain: 1. **Predictable Heat Treatment Response:** Reduced scrap and rework due to heat treatment variability 2. **Consistent Part Performance:** Uniform mechanical properties through the cross-section and across production batches 3. **Design Reliability:** Engineers can design with confidence, knowing the material will perform as expected 4. **Production Efficiency:** Fewer heat treatment adjustments and less testing required This material is particularly valuable for automotive and machinery components where consistent performance, fatigue resistance, and reliable heat treatment response are essential for product safety and longevity. While more expensive than standard 1335, the total cost savings in production consistency and part reliability often justify the premium for critical applications. -:- For detailed product information, please contact sales. -: AISI 1335H Steel Specification Dimensions Size： Diameter 20-1000 mm Length <4003 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 1335H Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1335H Steel Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1335H Steel Tube -:- For detailed product information, please contact sales. -:

Packing of AISI 1335H Steel Tube -:- 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 Tube 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 474 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