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AISI 4340 Steel Bar 36CrNiMo4 1.6511 EN24 817M40 SNCM439
Request AISI 4340 Steel Bar 36CrNiMo4 1.6511 EN24 817M40 SNCM439 by standard, size and finish, with inspection and mill test certificates from SAKY METAL.
Technical procurement data
Standards, supply and inspection
AISI 4340 Steel Bar 36CrNiMo4 1.6511 EN24 817M40 SNCM439 AISI 4340 is a nickel-chromium-molybdenum alloy steel used for highly loaded components requiring strength, toughness and fatigue resistance. Section size and final heat treatment must be considered together to achieve the specified properties.
| Material / grade | AISI/SAE 4340 / 36CrNiMo4 / EN 1.6511 / EN24 / 817M40 / SNCM439. |
|---|---|
| Product form | Bar |
| Standards and order reference | ASTM A29/A29M or ASTM A322 are common bar references; EN or customer aerospace requirements can be stated separately. |
| Dimensions and tolerances | Diameter, length, straightness, machining allowance and forged reduction requirements are defined by the order. |
| Surface and supply condition | Hot rolled/forged, annealed, quenched and tempered, peeled or ground. |
| Inspection options | PMI, chemistry, tensile/hardness, dimensions, surface and ultrasonic testing for critical sections. |
| MTC and traceability | EN 10204 3.1 MTC, heat-treatment record, mechanical test results and NDT report when ordered. |
| Typical applications | Aircraft landing components, heavy-duty shafts, gears, fasteners and high-stress mechanical parts. |
| RFQ checklist | Send the bar grade and standard, required dimensions and tolerance, quantity, surface/condition, inspection and certificate requirements, packing preference and delivery destination. |
Final compliance is defined by the purchase order, approved drawing and issued mill documentation. Availability is confirmed for each grade, size and production route.
- Material: 1.7225 42CrMo4 SCM440
- Dia.: 8mm – 300mm
- Standard : ASTM A29 DIN 17200
- Surface : Black, Rough Machined, Turned
AISI 4340 Steel Bar | 36CrNiMo4 | 1.6511 | EN24 | 817M40 | SNCM439
SAKY METAL 4340 Steel is a medium carbon, low alloy steel known for its toughness and strength in relatively large sections. AISI 4340 is also one kind of nickel chromium molybdenum steels. 4340 alloy steel is generally supplied hardened and tempered in the tensile range of 930 – 1080 Mpa. Pre hardened and tempered 4340 steels can be further surface hardened by flame or induction hardening and by nitriding. The 4340 steel has good shock and impact resistance as well as wear and abrasion resistance in the hardened condition. AISI 4340 steel properties offer good ductility in the annealed condition, allowing it to be bent or formed. Fusion and resistance welding is also possible with our 4340 alloy steel. ASTM 4340 material is often utilized where other alloy steels do not have the hardenability to give the strength required. For highly stressed parts it is excellent choice. AISI 4340 alloy steel can also be machined by all customary methods.
Specifications
Relevant Standards
Chemical Composition
Mechanical Properties
Thermal Properties
Specifications
| Material | 36CrNiMo4 | 4340 | 1.6511 | EN24 | 817M40 | SNCM439,etc |
| Specification | ASTM A29 DIN 17200 GB/T 3077 BS 970 |
| Surface | Black, Rough Machined, Turned |
| Diameter Range | 1.0 ～ 300.0mm |
| Processing | Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished |
Relevant Standards
| Country | USA | Britain | Britain | Japan |
| Standard | ASTM A29 | EN 10250 | BS 970 | JIS G4103 |
| Grades | 4340 | 36CrNiMo4/ 1.6511 | EN24/817M40 | SNCM 439/SNCM8 |
Chemical Composition
| Standard | Grade | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A29 | 4340 | 0.38-0.43 | 0.60-0.80 | 0.035 | 0.040 | 0.15-0.35 | 1.65-2.00 | 0.70-0.90 | 0.20-0.30 |
| EN 10250 | 36CrNiMo4/ 1.6511 | 0.32-0.40 | 0.50-0.80 | 0.035 | 0.035 | ≦0.40 | 0.90-1.20 | 0.90-1.2 | 0.15-0.30 |
| BS 970 | EN24/817M40 | 0.36-0.44 | 0.45-0.70 | 0.035 | 0.040 | 0.1-0.40 | 1.3-1.7 | 1.00-1.40 | 0.20-0.35 |
| JIS G4103 | SNCM 439/SNCM8 | 0.36-0.43 | 0.60-0.90 | 0.030 | 0.030 | 0.15-0.35 | 1.60-2.00 | 0.60-1.00 | 0.15-0.30 |
Mechanical Properties
| Mechannical Properties (Heat Treated Condition ) | Condition | Ruling section mm | Tensile Strength MPa | Yield Strength MPa | Elong. % | Izod Impact J | Brinell Hardness |
| T | 250 | 850-1000 | 635 | 13 | 40 | 248-302 | |
| T | 150 | 850-1000 | 665 | 13 | 54 | 248-302 | |
| U | 100 | 930-1080 | 740 | 12 | 47 | 269-331 | |
| V | 63 | 1000-1150 | 835 | 12 | 47 | 293-352 | |
| W | 30 | 1080-1230 | 925 | 11 | 41 | 311-375 | |
| X | 30 | 1150-1300 | 1005 | 10 | 34 | 341-401 | |
| Y | 30 | 1230-1380 | 1080 | 10 | 24 | 363-429 | |
| Z | 30 | 1555- | 1125 | 5 | 10 | 444- | |
Thermal Properties
| Properties | Metric | Imperial |
| Thermal expansion co-efficient (20°C/68°F, specimen oil hardened, 600°C (1110°F) temper | 12.3 µm/m°C | 6.83 µin/in°F |
| Thermal conductivity (typical steel) | 44.5 W/mK | 309 BTU in/hr.ft².°F |
Features & Benefits
- After appropriate heat treatment, 440C stainless steel can achieve a high level of hardness, typically between 58-60 HRC, making it suitable for applications requiring high hardness.
- Due to its high carbon content and excellent heat treatment properties, 440C stainless steel exhibits outstanding wear resistance, making it suitable for various applications such as cutting tools, bearings, etc.
- 440C stainless steel can be effectively machined under appropriate conditions to meet various component requirements. However, due to its high hardness and strength, machining may be relatively challenging and requires suitable machining processes and tools.
- 440C stainless steel demonstrates good high-temperature stability, maintaining its hardness and wear resistance under elevated temperature conditions, making it suitable for applications in high-temperature environments.
- The mechanical properties of 440C stainless steel can be adjusted through heat treatment, such as hardness, strength, and toughness, to meet specific application requirements.
Part of Our Clients
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Why Choose Us?
You can get the perfect material according to your requirement at the least possible price.
We also offer Reworks, FOB, CFR, CIF, and door to door delivery prices. We suggest you to do deal for shipping which will be quite economical.
The materials we provide are completely verifiable, right from raw material test certificate to the final dimensional statement.(Reports will show on requirement)
We guarantee to give a response within 24hours(usually in the same hour)
Provide SGS TUV report.
We are fully dedicated to our customers. If it will not possible to meet your requirements after examining all options, we will not mislead you by making false promises which will create good customer relations.
Provide one-stop service.
Feedback From Our Clients
400 series stainless steel rods have several notable advantages, making them favored in various applications.400 series AISI 4340 is a nickel-chromium-molybdenum alloy steel used for highly loaded parts requiring strength, toughness and fatigue resistance. Heat treatment and section size must be specified together., such as the manufacturing of mechanical components.
Packaging
1. Packing is quite important especially in a case of international shipments in which consignment pass through various channels to reach the ultimate destination, so we put special concern regarding packaging.
2. SAKY METAL packages every order in numerous ways based on the products. We pack our products in multiple ways, such as,
Our Services
Cutting and Processing Services
Offering customized cutting and processing services to produce metal products that meet specific size and shape requirements.
Heat Treatment
Providing heat-treatment support for applicable metal products when hardness, strength, or other properties need to be adjusted.
Quality Control and Inspection
Implementing strict quality control and inspection processes to ensure that metal products meet relevant standards and customer requirements.
Get a Quote
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