1. What are Alloy Steel Ring, Plate, and Tube Forgings 4140?
Ring forgings are a product of the forging industry and are a type of forgings. It is a ring-shaped object that applies external force to a metal blank (excluding plates) and turns it into a suitable compression force through plastic deformation and shaping requirements. The forging process builds a refined grain structure and improves the metal's physical properties.
1. Carbon steel ring forgings: mainly used in machine tool manufacturing, pressure vessels, petrochemical industry, steam turbine manufacturing, tire mold manufacturing, and other fields. The main materials are 1020, 1035, 1045, etc.
2. Alloy steel ring forgings: mainly used in machine tool manufacturing, pressure vessels, petrochemical industry, steam turbine manufacturing, nuclear power, offshore engineering shipbuilding, etc. The main materials are 4135, 4140, 5140, etc.
3. Low alloy steel ring forgings: mainly used in machine tool manufacturing, pressure vessels, petrochemical industry, tire mold manufacturing, and other fields. Representative products include ring gears for machine tools, pattern rings for tire molds, intermediate mold sets, and ring forgings for wind power generation.
2. Chemical composition of alloy steel Ring, Plate, and Tube4140
4140 alloy steel is composed of iron, carbon, chromium, molybdenum, manganese, silicon, and other elements. It has excellent mechanical properties and heat resistance and is an important structural material.
| Element | Cr | Mn | C | Si | Mo | S | P | Fe |
|---|---|---|---|---|---|---|---|---|
| Content (%) | 0.80 - 1.10 | 0.75 - 1.0 | 0.380 - 0.430 | 0.15 - 0.30 | 0.15 - 0.25 | 0.040 | 0.035 | Balance |
3. Mechanical properties of alloy steel Ring, Plate, and Tube 4140
The mechanical properties of 4140 alloy steel are excellent, with a yield strength of 930-1200MPa, a tensile strength of 1080-1350MPa, an elongation of 10-25%, and a hardness of 217-388HBW.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 655 MPa | 95000 psi |
| Yield strength | 415 MPa | 60200 psi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 25.70% | 25.70% |
| Hardness, Brinell | 197 | 197 |
| Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
| Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) | 13 | 13 |
| Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
| Machinability (based on AISI 1212 as 100 machinability) | 65 | 65 |
4. Physical properties of alloy steel Ring, Plate, and Tube 4140
| Material 4140 coefficients of linear thermal expansion | ||
| Temperature (°C) | Value (10-6/K) | Treatment or condition |
| 20-100 | 12.2 | Oil hardened, tempered |
| 20-200 | 12.6 | |
| 20-400 | 13.6 | |
| 20-600 | 14.5 | |
| 4140 thermal conductivity | ||
| Value (W/m·K) | Temperature (°C) | Treatment or condition |
| 42.7 | 100 | Hardened & tempered |
| 42.3 | 200 | |
| 37.7 | 400 | |
| 33.1 | 600 | |
| AISI / SAE 4140 Specific Heat | ||
| Value (J/Kg·K) | Temperature (°C) | Treatment or condition |
| 473 | 20-200 | Hardened & tempered |
| 519 | 20-400 | |
| 561 | 20-600 | |
| Material 4140 Electrical Resistivity | ||
| Value (μΩ· m) | Temperature (°C) | Treatment or condition |
| 0.22 | 20 | Hardened & tempered |
| 0.26 | 100 | |
| 0.33 | 200 | |
| 0.48 | 400 | |
| 0.65 | 600 | |
4140 Steel Heat Treatment
| Material 4140 Heat Treat | Temperature (℃) | 4140 steel hardness | Cooling/Agent |
| Normalizing | 870 | 302 HB | Air |
| Annealing | 790-845 | 197 HB | Furnace cooling |
| Quenching | 830-845 | Oil | |
| Tempering (2 hour) | 205 | 58 HRC | Oil hardening |
| 260 | 54 HRC | ||
| 315 | 50 HRC | ||
| 370 | 47 HRC | ||
| 425 | 45 HRC | ||
| 480 | 40 HRC | ||
| 540 | 35 HRC | ||
| 595 | 33 HRC | ||
| 650 | 28 HRC |
5. Specifications of alloy steel Ring, Plate, and Tube 4140
Being a trustworthy alloy steel ring manufacturer and supplier, Shanghai Yinggui Metal Pbaructs Company aims to make manufacturing easier for our business partners. Shanghai Yinggui Metal offers 1320, 1330, 1335, 4119, 4135, 4140, 5120, 5130, 5140, 5150, 6150, 8620 etc.
| FORGING | TYPE | MAX. WEIGHT | MAX. DIMENSION | ALLOY | STANDARD |
| Open die forging | Cube/valve | ≤ 20t | Length ≤ 7000mm , Width ≤ 2000mm , Height ≥ 150mm | 1320,1330,1335,1340,1345,3120, 3140,3145,3150,3215,3415,3435, 3335,3310,3320,4119,4130,4135, 4140,4340,5150,5120,5130,5135, 5140,5145,5150,6120,6150, (SAE)6470E,(SAE)6140,8620. | GB/T1299, ASTM A29 |
| Disk | ≤ 20t | Diameter ≤ 3500mm, Height ≥ 150mm | NB/T 47009, NB/T 47010, EN10083, EN 10084 | ||
| Ring/circle | ≤ 20t | Diameter ≤ 3500mm , Height ≥ 150mm | NB/T 47009, NB/T 47010, EN10083, EN 10084 | ||
| Cylinder | ≤ 20t | Diameter ≤ 2000mm , Length ≤ 2000mm | NB/T 47008, ASME SA336 | ||
| Axle | ≤ 20t | Length ≤ 7000mm , Diameter ≤ 1500mm | JB/T 1267, JB/T 1270 |
| Materials | 20CrMnMo ,4140,34CrNiMo7-6,18CrNiMo7-6, 35Crmo |
| Forging equipment | 6000T open die hydropress |
| Application | Forged rings can be widely used in metallurgy, mining, lifting, light industry, chemical industry, transportation, construction, and other machinery and equipment deceleration mechanisms. |
| Melting process | EF+LF+VD |
| Production process | Forging+heat treatment+rough machining+QT+hobbing+gear grinding+finish machining |
| Forging ratio | ≥3.5 |
| Applicable standard | ASTM, ASME, DIN, JIS, ISO, BS, API, EN |
| Executive standard | JB/GB/EN/DIN/JIS/ASME/ASTM/ISO |
| Certification authorities | ISO9001:2008,TÜV(BV),(LR),ABS,RINA,(GL),(KR),(DNV),(NK),PED. |
| Delivery terms | Rough machining(N+T);finish machining(Q+T),nitriding quenching |
| Test machine | Spectrograph, UT device, tensile and compact test machine,metalloscope, outside micrometer, bore dial indicator, trilinear coordinate measuring machine,hardness test machine |
| Service | Our service included the forging, process, heat treatment, finish machining, package, local logistics, customer clearance, and maritime transport. We took the customer’s requirements as the principal thing and paid attention to the quality of the product. |
6. Applications and characteristics of the alloy steel Ring, Plate, and Tube
4140 alloy steel can be made into round steel bars, flat & square steel bars, steel plates, and steel tubes, and has many uses in the aerospace, oil, and gas, and automotive industries, typical uses are thin-walled pressure vessels, forged gears, Motor shafts, pump shafts, hydraulic shafts, lathe spindles, milling spindles, collars, clamps, high strength bolts, valve bonnet, screws, nuts, worms, collets, torsion bars, and various carburized parts.
7. Main alloy steel product brand list
| Comparison of Chinese and foreign grades of alloy steel | |||||||||
| China GB | ISO | Former Soviet Union гOCT | Germany DIN | United States | Japan JIS | U.K. | France | ||
| ASTM | UNS | AISI | BS | NF | |||||
| 20Mn2 | 20Mn6 | 20г2 | 20Mn5 | G13200 | 1320 | SMn420 | 150M19 | 20M5 | |
| 30Mn2 | 28Mn6 | 30г2 | 28Mn6 | G13300 | 1330 | SMn433 | 150M28 | 32M5 | |
| 35Mn2 | 36Mn6 | 35г2 | 36Mn6 | G13350 | 1335 | SMn433 | 150M36 | 35M5 | |
| 40Mn2 | 42Mn6 | 40г2 | G13400 | 1340 | SMn438 | 40M5 | |||
| 45Mn2 | 45г2 | 46Mn7 | G13450 | 1345 | SMn443 | 45M5 | |||
| 50Mn2 | 50г2 | 50Mn7 | 55M5 | ||||||
| 20MnV | 17MnV6 | ||||||||
| 30Mn2MoW | |||||||||
| 27SiMn | 27Cг | 27MnSi5 | |||||||
| 35SiMn | 35Cг | 37MnSi5 | 38Ms5 | ||||||
| 42SiMn | 42Cг | 46MnSi4 | 41s7 | ||||||
| 20SiMn2MoV | |||||||||
| 25SiMn2MoV | |||||||||
| 37SiMn2MoV | |||||||||
| 40B | 35B2 | G50401 | 50B40 | ||||||
| 45B | 45B2 | G50461 | 50B46 | ||||||
| 50B | G50501 | 50B50 | |||||||
| 40MnB | 40MnB4 | ||||||||
| 45MnB | 38MB5 | ||||||||
| 20Mn2B | 20MB5 | ||||||||
| 20MnMoB | |||||||||
| 15MnVB | |||||||||
| 20MnVB | |||||||||
| 20MnVB | |||||||||
| 20MnTiB | |||||||||
| 25MnTiBRE | |||||||||
| 20SiMnVB | |||||||||
| 15Cr | 15X | 15Cr3 | G51150 | 5150 | SCr415 | 527A17 | 12C3 | ||
| 15CrA | 15XA | ||||||||
| 20Cr | 20Cr4 | 20X | 20Cr4 | G51200 | 5120 | SCr420 | 527A19 | 18C3 | |
| 30Cr | 30X | 28Cr4 | G51300 | 5130 | SCr430 | 530A30 | 28C4 | ||
| 35Cr | 34Cr4 | 35X | 34Cr4 | G513500 | 5135 | SCr435 | 530A36 | 38C4 | |
| 40Cr | 41Cr | 40X | 41Cr4 | G51400 | 5140 | SCr440 | 530A40 | 42C4 | |
| 45Cr | 45X | G51450 | 5145 | SCr445 | 45C4 | ||||
| 50Cr | 50X | G51500 | 5150 | 50C4 | |||||
| 38CrSi | 38XC | ||||||||
| 12CrMo | 12XM | 12CrMo44 | 12CD4 | ||||||
| 15CrMo | 15XM | 15CrMo5 | SCM415 | 15CD4.05 | |||||
| 20CrMo | 18CrMo4 | 20XM | 20CrMo4 | G41190 | 4119 | SCM420 | CDS12 | 18CD4 | |
| 30CrMo | 30XM | G41300 | 4130 | SCM430 | CDS13 | 30CD4 | |||
| 30CrMoA | |||||||||
| 35CrMo | 34CrMo4 | 35XM | 34CrMo4 | G41350 | 4135 | SCM435 | 708A37 | 34CD4 | |
| 42CrMo | 42CrMo4 | 38XM | 42CrMo4 | G41400 | 4140 | SCM440 | 708A40 | 42CD4 | |
| 12CrMoV | 12XMф | ||||||||
| 35CrMoV | 35XMф | 35CrMoV5 | |||||||
| 12Cr1MoV | 12X1Mф | 13CrMoV4·2 | |||||||
| 25Cr2MoVA | 25X2MфA | 24CrMoV5·5 | |||||||
| 25Cr2Mo1VA | 25X2M1фA | ||||||||
| 20Cr3MoWVA | 20X3MBф | 21CrVMoW12 | (SAE)6470E | SACM645 | 905M35 | 40CAD6·12 | |||
| 38CrMoA1 | 41CrA1Mo74 | 38XM1фA | 41CrA1Mo7 | G61200 | 6120 | ||||
| 20CrV | 20Xф | 21CrV4 | (SAE)6140 | ||||||
| 40CrV | 40XфA | 42CrV6 | |||||||
| 50CrVA | 51CrV4 | 50XфA | 50CrV4 | G61500 | 6150 | SUP10 | 735A50 | 50CrV4 | |
| 15CrMn | 15Xг | 16MnCr5 | 16MC5 | ||||||
| 20CrMn | 20MnCr5 | 20Xг | 20MnCr5 | G51200 | 5120 | SMnC420 | 20MC5 | ||
| 40CrMn | 40Xг | 5140 | SMnC443 | ||||||
| 20CrMnSi | 20Xгс | ||||||||
| 25CrMnSi | 25Xгс | ||||||||
| 30CrMnSi | 30Xгс | ||||||||
| 30CrMnSiA | 30XгсA | ||||||||
| 35CrMnSiA | 35XгсA | ||||||||
| 20CrMnMo | 25XгM | 20CrMo5 | 4119 | SCM421 | 708M40 | 42CD4 | |||
| 40CrMnMo | 38XгM | SCM440 | |||||||
| 20CrMnTi | 18XгT | ||||||||
| 30CrMnTi | 30XгT | 30MnCrTi4 | |||||||
| 20CrNi | 20XH | 20NiCr6 | 3120 | 637M17 | 20NC6 | ||||
| 40CrNi | 40XH | 40NiCr6 | G31400 | 3140 | SNC236 | 640M40 | 35NC6 | ||
| 45CrNi | 45XH | 45NiCr6 | G31450 | 3145 | |||||
| 50CrNi | 50XH | 3150 | |||||||
| 12CrNi2 | 12XH2 | 14NiCr10 | 3215 | SNC415 | 14NC11 | ||||
| 12CrNi3 | 15CrNi13 | 12XH3A | 14NiCr14 | 3415 | SNC815 | 655M13 | 14NC12 | ||
| 20CrNi3 | 20XH3A | 22NiCr14 | 20NC11 | ||||||
| 30CrNi3 | 30XH3A | 31NiCr14 | 3435 | SNC631 | 653M31 | 30NC12 | |||
| 37CrNi3 | 37XH3 | 35NiCr18 | 3335 | SNC836 | 35NC15 | ||||
| 12Cr2Ni4 | 12X2H4A | 14NiCr18 | G33106 | 3310 | 659M15 | 12NV15 | |||
| 20Cr2Ni4 | 20X2H4A | 3320 | 20NC14 | ||||||
| 20CrNiMo | 20NiCrMo2 | 20XHM | 21NiCrMo2 | G86200 | 8620 | SNCM220 | 805M20 | 20NCD2 | |
| 40CrNiMoA | 40XHMA | 36NiCrMo4 | G43400 | 4340 | SNCM439 | 817M40 | 40NCD3 | ||
| 45CrNiMoVA | 45XMфA | SNCM447 | |||||||
| 18Cr2Ni4WA | 18X2H4BA | ||||||||
| 25Cr2Ni4WA | 25X2H4BA | ||||||||
