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Grade Introduction:
The high-quality USA AISI CW-1 material is one of the more steel grades we supply, W-Ta-Nb-Ti-Co class carbide. CW-1 is our main production grade, which has been approved by customers in many countries since its initial production, including our CW-1 round bars, flat bar, forgings, fasteners, tubes, wires, strips, sheets & Plates, as well as a variety of profiles, professional high precision auto-lathe processing manufacturer of clinching fasteners, axes, standoffs, screws, studs, nuts, bolt, OEM parts and special-shaped turning parts the state of delivery includes quenched and tempered, annealed, machined semi-finished products, we also have strict management of the packaging, to avoid material damage from transportation. We are the best supplier of CW-1 materials, and we are willing to develop together with customers from all over the world.
Grade Application:
Equivalent grades:
| Material | Standard | Country |
| CW-12MW | AISI | USA |
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, OHNS, D2, D3, H-11, H-13, M2, M35, M42, 2714, SKD-11, P20, P20+S, P20+Ni, SCM 420, ASTM SA-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE 52100, S40C, S355J2G3.
Our Supply Range:
Price List:
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Chemical composition:
The following table shows the chemical composition of CW-1 steel:
| C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Cr ≤ | Ni ≤ |
| 6.7 | — | — | — | — | — | — |
| Mo | AI | W | Nb | Ti | V | Ta |
| — | — | 68.9 | 1.6 | 6.7 | – | 5.4 |
| N | Co | Pb | B | Other | — | — |
| — | 10.7 | — | — | — | — | — |
Mechanical Properties:
| Properties | Conditions
|
||||
| Density (×1000 kg/m3) | 7.7-8.03 | 25 | – | ||
| Poisson’s Ratio | 0.27-0.30 | 25 | – | ||
| Elastic Modulus (GPa) | 190-210 | 25 | – | ||
| Tensile Strength (Mpa) | 1158 | 25 | oil quenched, fine grained, tempered at 425°C | ||
| Yield Strength (Mpa) | 1034 | - | - | ||
| Elongation (%) | 15 | - | - | ||
| Reduction in Area (%) | 53 | - | - | ||
| Hardness (HB) | 335 | 25 | oil quenched, fine grained, tempered at 425°C | ||
Hardness:
335
Heat Treatment:
1565°C – 1756°C
Hardening:
Micro-Melt 420-CW tool steel should be heat treated using proper precautions to prevent decarburization. First preheat to 1500/1550°F (816/843°C), equalize, and transfer to a furnace maintained at the desired hardening temperature. Austenitize: 1950-2150°F (1066-1175°C) and hold time at temperature for 20-30 minutes. Note: For larger section sizes, fan air cooling or step quenching in oil or salt may be used in order to obtain the optimum quench rate.
Tempering:
Tools should be tempered immediately after completion of the hardening treatment. The tempering temperature may be adjusted according to the final hardness desired. Double temper at 400-750°F (200-400°C). Hold for a minimum of 2 hrs. each temper. Tempering in this temperature range provides the best corrosion resistance and wear resistance. Tempering between about 800 and 1000°F (427 and 538°C) is not recommended. All martensitic stainless steels suffer from embrittlement when tempered in this range. For optimum stress relieving and dimensional stability, Micro-Melt 420-CW may be double tempered at 1025°F, but some loss of corrosion resistance may result. A –100°F refrigeration treatment may be employed between the first and second tempers, if desired. Freezing treatments should always be followed by at least one temper. The typical hardness of Micro-Melt 420-CW after hardening and tempering is 56-60 HRC.
Physical Properties
The physical properties of SAE 4140 alloy steel are highlighted in the following table.
| Quantity | Value | Unit |
| Thermal expansion | 16 – 17 | e-6/K |
| Thermal conductivity | 16 – 16 | W/m.K |
| Specific heat | 500 – 500 | J/kg.K |
| Melting temperature | 1370 – 1400 | °C |
| Service temperature | 0 – 500 | °C |
| Density | 8000 – 8000 | kg/m3 |
| Resistivity | 0.7 – 0.7 | Ohm.mm2/m |
Thermal Properties
| Properties | Conditions | ||
| T (°C) | Treatment | ||
| Thermal Conductivity (W/m-K) | 42.7 | 100 | – |
| Specific Heat (J/kg-K) | 477 | 50-100 | – |
Forging Properties:
Heat slowly to 2000/2100°F (1093/1149°C). Do not work below 1700°F (927°C). Reheat as necessary. Cool forgings slowly and anneal immediately upon cooling.
Stress Relieving:
Annealed Parts: Heat to 1100-1300°F (593-705°C), hold 2 hours, then furnace cool or cool in still air.
Hardened Parts: Heat to 25-50°F (15-30°C) below original tempering temperature, hold 2 hours, then furnace cool or cool in still air.
Normalizing:
Normalizing is not recommended.
Annealing:
Heat slowly to 1650°F (899°C), hold for 2 hours, cool slowly at a rate of 25°F (14°C) maximum per hour to 1000°F (538°C), then either furnace cool or cool in still air to room temperature. Typical annealed hardness will be 277 Brinell.
Density:
| Quantity | Value | Unit |
| Density | 8000-8000 | kg/m3 |
Machinability:
The machinability of Micro-Melt 420-CW tool steel in the annealed condition may be rated between 35% and 40% of 1% carbon tool steel. Tooling providers’ recommendations for cutting fluids should be followed. Micro-Melt 420-CW tool steel can be easily EDM’d. Use proper precautions to prevent and/or remove the “white layer.”
Welding:
Supply Cities:
Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Ranipet, Sivakasi, Karur, Hosur, Nagercoil, Kanchipuram, Karaikudi, Neyveli, Cuddalore, Kumbakonam, Thiruvannamalai, Pollachi, Rajapalayam, Gudiyatham, Pudukottai, Vaniyambadi, Ambur, Nagapattinam, Trivandrum, Vijayawada, Guntur, Thirupathi, Nazarathpet, Kakinada, Kurnool, Kadapa, Nizamabad, Mahabubnagar, Karimnagar.
