Alloy Steel for Custom Industrial Components
LANJIAN manufactures drawing-based components from project-confirmed engineering alloy steel grades. Alloy composition, hardenability, critical section size, heat-treatment condition, final hardness, toughness and required verification records are reviewed before production.
- Grade, Standard & Alloy System Confirmed
- Hardenability & Critical Section Reviewed
- Heat Treatment & Final Properties Defined
- Chemistry, Mechanical & Heat-Treatment Records
Scope: Drawing-based components made from confirmed non-stainless engineering alloy steel grades—not alloy steel raw-material supply.
What Alloy Steel Can LANJIAN Work With?
LANJIAN produces custom non-stainless alloy steel castings according to customer drawings and specified material standards. The representative grades below cover general engineering, low-temperature pressure, high-temperature pressure, and impact-wear applications. The exact grade, casting section, heat-treatment condition, required properties and inspection requirements are confirmed for each project.
Alloy Steel Type |
| Material Profile | Suitable Conditions & Components | ||
Low-Alloy Engineering Cast Steel | GB/T 14408: ZGD410-620, ZGD535-720, ZGD650-830 | Performance: Strength, toughness and hardenability depend on the specified grade and heat treatment. | Conditions: Load-bearing or high-stress engineering applications. | ||
Common customer-specified references: ZG20SiMn, ZG35CrMo, ZG42CrMo | Heat treatment: Normalizing and tempering or quenching and tempering may be required to achieve the specified properties. | Priority: Strength, toughness, fatigue performance and final hardness. | |||
Components: Load-bearing housings, supports, hubs, brackets and structural castings. | |||||
Low-Temperature Alloy Cast Steel | ASTM A352/A352M: LC1, LC2, LC3 | Service: Ferritic alloy steel grades intended for pressure-containing parts in specified low-temperature service. | Conditions: Low-temperature pressure service. | ||
Control: Heat treatment, section size and impact testing affect qualification. | Priority: Design minimum metal temperature, Charpy impact performance and applicable construction code. | ||||
Components: Valve bodies, flanges, fittings and pressure housings. | |||||
High-Temperature Cr-Mo Cast Steel | ASTM A217/A217M: WC6, WC9 | Composition: Chromium-molybdenum alloy cast steels. | Conditions: Elevated-temperature pressure service. | ||
Service: Designed for pressure-containing components operating at elevated temperatures. | Priority: Operating temperature, mechanical properties, welding, NDT and code compliance. | ||||
Control: Heat treatment and welding procedures must match the grade and service requirements. | Components: Valve bodies, pressure housings, flanges and high-temperature piping components. | ||||
Austenitic Manganese Cast Steel | GB/T 5680: ZG100Mn13, ZG120Mn13 | Structure: Austenitic manganese steel produced through suitable solution heat treatment. | Conditions: Combined impact and abrasive wear. | ||
ASTM A128/A128M: Grade A, Grade B-2 | Performance: High toughness with surface work-hardening under repeated impact and abrasive wear. | Priority: Impact severity, wear mechanism, solution heat treatment and carbide control. | |||
Application fit: Adequate impact is normally required to develop effective work-hardening. | Components: Crusher liners, mill liners, hammers, wear plates and other impact-wear castings. |
Grades from different standards are representative references, not exact equivalents. Chemistry, mechanical properties, heat treatment and testing must follow the governing specification.
Composition-based references such as ZG20SiMn, ZG35CrMo and ZG42CrMo should be supplied with the applicable specification, required chemistry, heat-treatment condition and mechanical properties.
Alloy Steel Characteristics at a Glance
Alloy steel casting performance cannot be determined by grade name alone. Alloy composition, casting section, microstructure and final heat-treatment condition jointly determine the component’s mechanical and manufacturing properties.
Alloying Elements and Performance
Chromium, molybdenum, nickel and manganese can improve strength, toughness, hardenability, wear response or temperature performance. The result depends on the complete chemical composition and heat treatment—not one alloying element alone.
Hardenability and Section Size
Hardenability affects how deeply the required microstructure and hardness develop during heat treatment. Thick and thin casting sections cool differently, so critical-section hardness or mechanical properties may need to be verified.
Heat-Treatment Response
Normalizing and tempering or quenching and tempering can adjust strength, hardness and toughness. Austenitic manganese steel normally requires solution heat treatment. The specified grade, section size and required properties determine the appropriate treatment.
Toughness and Service Temperature
Low-temperature alloy steel castings may require Charpy impact testing at a specified temperature. High-temperature Cr-Mo cast steels must be selected according to operating temperature, pressure and the applicable construction code.
Weldability and Machinability
Higher carbon equivalent and hardenability can increase weld-cracking risk, while final hardness and microstructure directly affect machinability. Preheating, controlled heat input, post-weld heat treatment and machining-stage hardness may need to be specified.
Wear and Corrosion Behavior
Austenitic manganese steel work-hardens under sufficient impact and abrasion. Other wear-resistant alloy steels obtain their required hardness and wear response through controlled composition and heat treatment. Most non-stainless alloy steels still require corrosion protection.
What Alloy Steel Requirements Should Be Confirmed Before Production?
“Alloy steel,” “Cr-Mo steel” or “manganese steel” alone is not a complete material specification. Before production, the grade, governing standard, service conditions, casting section, required properties, heat treatment and acceptance criteria should be confirmed.
What Should Be Confirmed | What to Specify |
| ||
Grade, Chemistry and Standard | Exact material designation, governing ASTM, GB/T, EN or customer specification, and any additional chemical-composition limits. | Similar designations under different standards may have different chemistry, mechanical properties and heat-treatment requirements. A strength class may not identify a specific alloy composition. | ||
Service Conditions and Applicable Code | Applied load, impact or abrasion conditions, operating pressure, minimum and maximum metal temperature, corrosive exposure, required surface protection and applicable construction code. | General engineering, low-temperature, high-temperature and impact-wear applications require different alloy grades and acceptance criteria. | ||
Casting Section and Required Properties | Critical section thickness and required tensile strength, yield strength, elongation, hardness, impact energy and test temperature. | Cooling rate and heat-treatment response vary with section size. Test-specimen results may not represent every location in the finished casting. | ||
Heat Treatment and Microstructure | Required condition such as normalizing and tempering, quenching and tempering, or solution heat treatment, together with hardness and microstructure limits. | Heat treatment determines the final strength and toughness. Incorrect treatment can produce unsuitable microstructure, excessive hardness or, where applicable, retained carbides. | ||
Inspection, Testing and Documentation | Heat traceability, material certificate, chemical analysis, tensile, hardness or Charpy testing, NDT method, acceptance level and third-party inspection requirements. | A material certificate alone may not verify local casting properties, internal soundness or compliance at critical sections. | ||
Welding, Repair and Machining | Whether weld repair is permitted, applicable welding procedure, preheat or post-weld treatment, machining stage, critical features and final hardness. |
Test-specimen type, sample location, testing frequency, acceptance criteria and report format should be agreed before production.
Alloy Steel FAQ
LANJIAN works with low-alloy engineering cast steel, low-temperature alloy cast steel, high-temperature Cr-Mo cast steel and austenitic manganese cast steel. Representative grades include ZGD410-620, LC1, LC2, LC3, WC6, WC9, ZG100Mn13 and ZG120Mn13. Final feasibility depends on the drawing, governing standard, section size, heat treatment and required properties.
No. ASTM, GB/T, EN and customer specifications may use different chemical-composition limits, heat treatments, test specimens and mechanical-property requirements. A similar grade name or strength class does not establish equivalence. The governing standard and acceptance criteria should be stated on the drawing or purchase specification.
No. Heat treatment depends on the alloy grade, casting section and required mechanical properties. Depending on the specification, the process may include normalizing and tempering, quenching and tempering, or solution heat treatment. The required final material condition should be confirmed before production.
Thick and thin sections cool differently during casting and heat treatment. This can produce variations in microstructure, hardness, strength and toughness within the same component. Critical-section requirements, test locations and acceptable hardness variation should therefore be confirmed before production.
Low-temperature pressure castings under ASTM A352/A352M, such as LC1, LC2 and LC3, are selected according to the design minimum metal temperature, section size and Charpy impact requirements. High-temperature pressure castings under ASTM A217/A217M, such as WC6 and WC9, are selected according to operating temperature, pressure and the applicable construction code. These grades are not interchangeable.
Austenitic manganese steel is suitable for components exposed to combined impact and abrasive wear. Repeated impact work-hardens the surface while the core retains toughness. In low-impact sliding-abrasion service, sufficient work-hardening may not develop, so another wear-resistant material may be more appropriate.
Yes, when repair is permitted by the governing standard and customer specification. Repair may require an approved welding procedure, complete defect removal, suitable filler material and controlled preheating, heat input, cooling or post-weld heat treatment. Repaired areas may also require specified nondestructive testing.
Verification may include heat traceability, material certificates, chemical analysis, tensile testing, hardness testing, Charpy impact testing and metallographic examination. Liquid penetrant or magnetic-particle testing may be specified for surface defects, depending on the alloy’s magnetic properties. Ultrasonic or radiographic testing may be used for internal discontinuities when required. Test location, frequency and acceptance criteria should be agreed before production.
Need the Right Alloy Steel for Your Component?
Send your drawing or available project details. LANJIAN will review the alloy steel grade and standard, service conditions, casting section, heat treatment, required mechanical properties and inspection requirements before quotation.