AISI 4130 Forged Parts Manufacturer in China
Quick Answer: What We Supply in AISI 4130
Jiangsu Liangyi manufactures custom AISI 4130 forged parts in China, including forged bars, shafts, seamless rolled rings, hollow forgings and other engineered components. The following are summarized information about our company.
- Material names covered: AISI 4130, SAE 4130, UNS G41300, 25CrMo4 and 1.7218.
- Main product forms: bars, shafts, rolled rings, hollow forgings, sleeves, discs, blocks and custom components.
- Manufacturing scope: forging, heat treatment, machining support, UT/MPI and traceability documentation.
- Typical end-use sectors: oil & gas, power generation, marine, mining, valves and heavy machinery.
AISI 4130 Forged Bars & Shafts
SAE 4130 Seamless Rolled Rings
Custom AISI 4130 Forged Components
AISI 4130 (SAE 4130, UNS G41300) Alloy Steel Material Overview
Established in 1997, Jiangsu Liangyi is a professional ISO 9001:2015 certified manufacturer located in Jiangyin City, Jiangsu Province, China. Our company is specialized in producing custom AISI 4130 open die forgings, seamless rolled rings, and industrial components.
Our factory covers 80,000 ㎡ and has advanced forging and testing equipment, with an annual production capacity of 120,000 tons. we have served clients from over 50 countries around the world.
Key Facts at a Glance
The following is the summarized information about AISI 4130 forged parts.
| Material aliases | AISI 4130, SAE 4130, UNS G41300, 25CrMo4, 1.7218 |
|---|---|
| Product forms | Forged bars, shafts, seamless rolled rings, sleeves, hollow forgings, discs, blocks and custom drawing-based parts |
| Single piece weight | 30 kg to 30,000 kg |
| Maximum ring diameter | Up to 5 meters for seamless rolled rings |
| Heat treatment | Normalizing, quenching and tempering according to project requirements |
| Inspection available | Chemical analysis, tensile test, hardness, Charpy impact, UT, MPI and traceability records |
| Documents supplied | MTC 3.1/3.2, heat treatment records, NDT reports and certificate of compliance |
| Main industries served | Oil & gas, power, marine, mining, valves and heavy machinery |
Equivalent Grade Names Buyers Commonly Search
| System | Grade Name | Search Intent |
|---|---|---|
| AISI / SAE | 4130 | North American material designation for chromoly alloy steel forgings |
| UNS | G41300 | Unified numbering reference used in procurement and specifications |
| EN / DIN | 25CrMo4 / 1.7218 | European naming often used for cross-border equivalency checks |
| Common industry wording | 4130 chromoly steel | General search phrase used by engineers and buyers |
AISI 4130 vs 4140: Quick Comparison for Buyers
A common question is which is better: 4130 or 4140.
In short, 4130 is often selected for its good weldability and toughness , while 4140 is usually chosen when higher hardenability and strength are needed.| Factor | AISI 4130 | AISI 4140 |
|---|---|---|
| Carbon level | Lower | Higher |
| Weldability | Generally better | Generally lower than 4130 |
| Toughness | Very good for structural forged parts | Good, but depends more strongly on heat treatment |
| Strength potential | High | Usually higher after heat treatment |
| Typical selection logic | Welded structures, shafts, rings and balanced strength-toughness needs | Higher hardness and wear-resistance oriented parts |
Our Core Advantages for AISI 4130 Forgings
25+ Years Forging Experience
Specialized in chromoly steel forging since 1997, with many experience of serving clients around the world.
Full Customization Capability
Full service from steel melting, forging, heat treatment to fine machining, fully meet clients drawings.
Advanced Production Equipment
Equipped with 6300T hydraulic press, 5M rolling machine, and complete heat treatment & testing facilities.
Strict Quality Control
100% non-destructive testing, full traceability from raw material to finished product, and MTC 3.1/3.2 certificate is available
Global Delivery Support
Support FOB, CIF, DDP, DDU trade terms, with sea freight,air freight and express delivery to over 50 countries around the world
Complete Certification
ISO 9001:2015 certified, fully meet API 6A, ASTM, DIN, EN, JIS international standards.
Custom AISI 4130 Forged Product Range
We supply a full range of custom AISI 4130 (25CrMo4) forged steel products with different dimensions, mechanical properties and heat treatment requirements. Following are our main products.
AISI 4130 Forged Bars & Shafts
AISI 4130 forged round bars, square bars, flat bars, rectangular bars, step shafts, gear shafts, crank shafts, turbine shafts, and custom rods, with weight ranges from 30KGS to 30,000KGS for different transmission applications.
SAE 4130 Seamless Rolled Rings
SAE 4130 seamless rolled rings, gear rings, slewing bearing rings, contoured rolled rings, swivel ring flanges, and custom forging rings, they are the best choice material for high-pressure valves, wellhead equipment, and bearing applications. And the maximum rolling diameter is up to 5 meters.
UNS G41300 Hollow Forgings & Pressure Components
UNS G41300 forged sleeves, bushings, casings, hollow bars, pipe tubes, barrels, and housings, designed for boiler, heat exchanger, pressure vessel, and downhole drilling components, and they all meet international pressure vessel standards.
Custom AISI 4130 Engineered Forged Components
We also manufacture custom AISI 4130 forged discs, blocks, plates, valve components, pump parts, gearbox components, flanges, crane wheels, tube sheets, and other engineered parts, fully meet your technical requirements.
AISI 4130 Forgings Industry Applications & Global Field Cases
AISI 4130 forged parts are used in industries because they have high strength, good toughness and reliable performance even under harsh working conditions. Our 4130 chromoly forgings are manufactured according to API 6A, ASTM, DIN, EN, JIS international standards,and they are used in the following industries:
Oil & Gas Industry AISI 4130 Forgings Applications
Our SAE 4130 forgings are used in upstream, midstream, and downstream oil and gas operations, including frac pump pinion shafts, bull gears, fluid end modules, wellhead christmas tree equipment, casing heads, tubing spools, blowout preventer (BOP) bodies, downhole drilling tools, mud motor components, and high-pressure pipeline fittings. they all meet NACE MR0175 sulfide stress cracking resistance requirements.
Marine & Shipbuilding Industry AISI 4130 Forgings Applications
Our AISI 4130 forged marine components include propeller shafts, rudder stocks, deck machinery parts, and offshore engineering components.they all pass international classification society certificate and have excellent anti-fatigue performance and corrosion resistance for harsh marine environments,
Mining & Construction Machinery AISI 4130 Forgings Applications
SAE 4130 steel is a good material for heavy-duty mining machinery, construction equipment, gearbox components, gear reducer gear wheels, pinion shafts, ring gears, crane wheels, and hydraulic cylinder parts, having reliable performance under extreme heavy load conditions.
Aerospace & Defense Industry Applications
We supply AISI 4130 forged components for aerospace and defense applications, including structural parts, landing gear components, and engine mounts, with strict control of material purity, mechanical properties, and dimensional accuracy.These components all meet AMS standards.
Valve, Flow Control & General Machinery Industries
Our UNS G41300 forged valve components include valve balls, bodies, bonnets, stems, seat rings, discs, and closures for ball valves, gate valves, check valves, butterfly valves, and cryogenic valves. And they are used for gas compressors, centrifugal machines, hydraulic equipment, and other types of machinery.
AISI 4130 Steel Chemical Composition
The chemical composition of our AISI 4130 forged material is strictly controlled according to ASTM A751 standards, with the following limits (Weight %):
| Element | Minimum | Maximum |
|---|---|---|
| Carbon (C) | 0.28 | 0.33 |
| Manganese (Mn) | 0.40 | 0.60 |
| Phosphorus (P) | - | 0.020 |
| Sulfur (S) | - | 0.025 |
| Silicon (Si) | 0.20 | 0.35 |
| Chromium (Cr) | 0.85 | 1.20 |
| Molybdenum (Mo) | 0.15 | 0.25 |
| Nickel (Ni) | - | 0.50 |
| Copper (Cu) | - | 0.35 |
| Vanadium (V) | - | 0.10 |
| Aluminum (Al) | - | 0.035 |
AISI 4130 Forgings Mechanical Properties
The mechanical properties of our SAE 4130 forged parts are tested based on ASTM A370 standards, with hardness tested per ASTM E18 or E10 at the mid-radius location. The maximum yield strength to tensile strength ratio is strictly controlled at 0.90.
| Mechanical Property | Minimum Value | Maximum Value |
|---|---|---|
| Yield Strength (0.2% Offset) | 75,000 PSI (517 MPa) | - |
| Tensile Strength | 95,000 PSI (655 MPa) | 115,000 PSI (792 MPa) |
| Elongation (in 2") | 17% | - |
| Reduction of Area | 35% | - |
| Brinell Hardness (HBW) | 197 | 237 |
AISI 4130 Low Temperature Impact Toughness
Charpy V-Notch impact testing for our UNS G41300 forged bars is done per ASTM A370, with requirements fully meet API 6A and API 16A standards. For longitudinal direction testing, the minimum average impact value is 20 ft-lb, with no single value falling below 2/3 of the required minimum average. For transverse direction testing, the minimum average impact value is 15 ft-lbs (20 joules) across all standard temperature classifications from 0°F (-18°C) to -75°F (-60°C).
AISI 4130 Forging & Heat Treatment Process
AISI 4130 Steel Melting & Forging Practice
Our AISI 4130 steel is produced via electric furnace melting, with optional refining processes including argon-oxygen decarburization (AOD) and vacuum degassing to make sure material's purity and uniformity.
Forging operations are performed per ASTM A788 standards, with a minimum forging reduction ratio of 3:1 to get great grain quality and mechanical properties.
Our forging workshop has 2000T/4000T/6300T hydraulic forging presses, 1T-9T electro-hydraulic forging hammers, and 1M-5M seamless rolling machines, so that we can produce AISI 4130 forgings ranging from 30KGS to 30,000KGS.
AISI 4130 Standard Heat Treatment Process
We offer both batch and continuous heat treatment for AISI 4130 forgings, with tight control over temperature, holding time, and cooling to meet your required mechanical properties. The standard quench and heat treatment process is as follows:
| Process Step | Temperature Range | Holding Time | Cooling Method |
|---|---|---|---|
| Normalizing (Optional) | 1600°F - 1700°F (871°C - 926°C) | 30 minutes per inch of through thickness | Inert gas or still air |
| Austenitizing | 1525°F - 1650°F (829°C - 898°C) | 30 minutes per inch of through thickness | - |
| Quenching | Water: Max 100°F (38°C) pre-quench, Max 120°F (49°C) post-quench; Polymer/Oil: Min 100°F (38°C) pre-quench | Water, polymer, or oil as required | |
| Tempering | Min 1175°F (635°C) | 45 minutes per inch of through thickness (1 hour minimum) | Slow cool to room temperature in inert gas or air |
For continuous furnace operations, we strictly control the furnace temperature and holding time,The minimum austenitizing temperature is 1575°F (857°C) and the minimum tempering temperature is 1175°F (635°C),making sure these parts have consistent mechanical properties.
Quality Control & Certification for AISI 4130 Forgings
We use a full-process quality control system for all AISI 4130 forged parts, with full traceability from raw material to finished product. Our factory has advanced equipment for non-destructive testing, chemical composition testing, mechanical property testing, and metallographical testing,which makes sure that all products are good enough to be delivered.
- Full Traceability: Every batch is traceable through the whole production process and each part is marked with individual number for tracking.
- Mandatory Inspection & Testing: We do chemical composition analysis (once per heat), tensile properties testing (once per heat & heat treat batch), surface hardness testing (100% per piece), Charpy impact testing (per need), 100% visual inspection, 100% ultrasonic testing (UT), and 100% magnetic particle inspection (MPI) as required.
Qualified Personnel: All inspection personnel are qualified and certified per SNT-TC-1A standards. - Complete Certification: We give clients all the certification, such as the Material Test Report (MTR) 3.1/3.2 with chemical analysis and mechanical properties, heat treat cycle records, non-destructive testing reports, and any other documents.
Applicable Standards for AISI 4130 Forged Parts
Our AISI 4130 forgings are manufactured and tested according to international industry standards, including but not limited to:
- API 6A: Specification for Wellhead and Christmas Tree Equipment
- API 16A: Specification for Drill-through Equipment
- ASME Boiler and Pressure Vessel Code Section V: Non Destructive Examination
- ASTM A370: Mechanical Testing of Steel Products
- ASTM A751: Test Methods for Chemical Analysis of Steel Products
- ASTM A788: Standard Specification for Steel Forgings – General Requirements
- ASTM E10 / E18: Hardness Testing Methods for Metallic Materials
- NACE MR-0175 / ISO 15156: Sulfide Stress Cracking Resistant Metallic Materials for Oilfield Equipment
- DIN, EN, JIS, AMS, GE international material and forging standards
Frequently Asked Questions About AISI 4130 Forgings
Heavy parts should be preheated and post-weld heat treated to keep their best mechanical properties and avoid cold cracking.
RFQ Checklist: What to Send for a Faster Quotation
To get a fast quote for AISI 4130 forged parts, send us the following details:
- Part name, annual quantity and target delivery schedule
- 2D drawing or 3D model
- Required material grade and delivery condition
- Mechanical property targets, hardness range and impact test requirements
- NDT scope such as UT, MPI, PMI or third-party inspection requirements
- Machining requirement and rough machining scope
- Trade term preference such as FOB, CIF, DDP or DDU
Contact Us For AISI 4130 Forgings Quotation
We are glad to provide the best price and superior quality AISI 4130 forged steel materials for global clients. Welcome to send your custom drawing, material requirement and quantity for a detailed quotation!
📧 Inquiry Email: [email protected]
📞 Phone/WhatsApp: +86-13585067993
🌐 Website: https://www.jnmtforgedparts.com
📍 Address: Chengchang Industry Park, Jiangyin City, Jiangsu Province, China