Cr12 Tool Steel (D3 / 1.2080 / SKD1) Supplier from China
Bulk Supply for Distributors & Stockists | Stable Quality, Reliable Delivery
Cr12 tool steel is a grade under the Chinese national standard. It is a classic high-carbon, high-chromium cold-work die steel that combines high strength, wear resistance, and hardenability. Equivalent grades to Cr12 include American AISI D3, German W-Nr. 1.2080, and Japanese JIS SKD1.
Cr12 Tool Steel Supply Overview
| Calificación | GB Cr12 / AISI D3 / DIN 1.2080 / JIS SKD1 |
| Condiciones de entrega | Totalmente recocido (estado blando para el mecanizado) |
| Formularios disponibles | Barra redonda / Barra plana / Placa / Bloque forjado |
| Capacidad de producción mensual | Aproximadamente 1000 toneladas métricas |
| Cantidad de exportación recomendada | Contenedor completo de 20GP (~26 toneladas) |
| Cantidad mínima de pedido | 5 toneladas |
| Plazo de entrega (con existencias de lingotes) | Aproximadamente 20 días |
| Plazo de entrega (fundición reciente) | 30–45 días |
| Plazo de entrega (Grado ESR) | Aproximadamente 60 días |
| Inspección | Equipo interno de pruebas ultrasónicas + Inspección por terceros disponible |
| Documentación | MTC (EN 10204 3.1) + Informe UT |
Why Global Distributors Source Cr12 from Aobo Steel
- Suministro mensual continuo de alrededor de 1000 toneladas
- Cantidad mínima de pedido (MOQ) a partir de 5 toneladas para pedidos al por mayor.
- Longitudes de barras y placas optimizadas para contenedores
- Se admiten tamaños mixtos para la carga de exportación.
- Entrega recocida para mecanizado posterior
- Abastecimiento estable a través de socios de cadena de suministro integrados
- Inspección UT disponible para SEP 1921-82 D/d o E/e
- Trazabilidad del MTC y del lote con cada envío
- Seguimiento del número de lote para el control de pedidos
- Opciones de superficie negra, torneada y pulida
- Embalaje a granel para exportación marítima
- Ruta de conversión clara a la página dedicada al suministro a granel.
Producción estable para un suministro a granel a largo plazo
- Producción mensual continua de alrededor de 1000 toneladas.
- Ciclos de producción continuos para la reposición de inventario.
- El proceso ESR (refundición por electroescoria) está disponible bajo petición.
- Suministro estable de aleaciones para reducir el riesgo de interrupción del suministro.
- Trazabilidad completa del lote vinculada al número de colada original.
Available Cr12 Tool Steel Forms
Control de calidad para pedidos al por mayor
Cada lote de acero para herramientas suministrado por Aobo Steel se verifica antes del envío para garantizar la precisión del grado, la integridad interna y la trazabilidad de los pedidos a granel.
- Composición química verificada mediante un espectrómetro.
- Pruebas ultrasónicas disponibles (SEP 1921-82)
- Entregado en estado recocido esferoidizado
- Certificado de prueba de fábrica (EN 10204 3.1) con número de colada
- Inspección dimensional y superficial antes del envío.
Embalaje para exportación y carga de contenedores
- Embalaje profesional apto para exportación marítima
- Carga de 20GP optimizada hasta ~26 toneladas
- Se admiten grados y tamaños mixtos.
- Protección anticorrosión para largos tránsitos marítimos
Para envíos internacionales, se recomienda encarecidamente la carga de contenedores completos para garantizar la rentabilidad y una tramitación aduanera más ágil.
Cr12 Tool Steel Composition(GB / T 1299—2000)
| C | Cr | Si | Minnesota | P | S |
| 2.00 – 2.30 | 11.50 – 13.00 | ≤ 0.40 | ≤ 0.40 | ≤ 0.030 | ≤ 0.030 |
Cr12 Tool Steel Mechanical Properties
Cr12 steel is classified as a high-carbon, high-chromium ledeburitic steel. Due to its high carbon mass fraction, it exhibits lower impact toughness and a tendency toward brittle fracture, coupled with a susceptibility to forming non-uniform eutectic carbides.
The high concentration of chromium in the steel promotes the formation of (CrFe)₇C₃ complex carbides, which in turn reduces the amount of cementite (Fe₃C). During quenching, a significant volume fraction of these carbides dissolves into the austenite phase. Subsequent quenching transforms the austenite into high-hardness martensite. Upon tempering, a fine and dispersed precipitation of carbides occurs within the martensitic matrix, resulting in excellent wear resistance.
Through an appropriate heat treatment process, a microstructure that combines high strength and toughness can be achieved.
Cr12 Tool Steel Forging Process
| Artículo | Heating Temperature/°C | Initial Forging Temperature/°C | Final Forging Temperature/°C | Método de enfriamiento |
| Lingote de acero | 1140 ~ 1160 | 1100 ~ 1120 | 900 ~ 920 | Slow Cooling |
| Lingote de acero | 1120 ~ 1140 | 1080 ~ 1100 | 880 ~ 920 | Slow Cooling |
The primary objective of forging Cr12 steel is to break down and refine the coarse carbides inherent in the steel, ensuring they are distributed uniformly throughout the matrix. This process significantly improves the material’s overall strength and toughness. Furthermore, proper forging establishes a rational alignment of flow lines within the die, which helps promote consistent, predictable dimensional changes (distortion) in all directions during subsequent quenching.
Regarding the heating procedure for forging, it is crucial to first preheat the workpiece before gradually increasing it to the final forging temperature. Attention must be paid to the proper placement of the workpiece within the furnace, and the material should be turned or flipped periodically to ensure uniform heating.
Cr12 Tool Steel Heat Treatment
Precalentamiento
| Parámetros del proceso | |
| General Annealing after Forging | Heating temperature: 850 ~ 870 °C. After uniform heating, hold for 4 ~ 5h. Furnace cool at a rate of <30°C/h to below 500°C, then air cool. Hardness after annealing: ≤229HBW. Microstructure after annealing: granular pearlite + carbide. |
| Isothermal Annealing after Forging | Heating temperature: 830 ~ 850 °C. Hold for 2 ~ 3h. Furnace cool to 720 ~ 740°C and hold for 3 ~ 4h. Furnace cool to below 550°C, then air cool. Hardness after annealing: ≤269HBW. Microstructure: granular pearlite + carbide. |
Temple
Quenching Specification
| Process | Temperatura de enfriamiento/°C | Método de enfriamiento | Dureza HRC |
| Recommended Quenching Specification | 950 ~ 980 | Oil Cooling | ≥60 |
| Isothermal Quenching Process | Heat to 980°C, hold for a certain period, then isothermally hold in a salt bath at 250 ~ 280°C for a period of time, and then air cool to obtain a mixed structure of lower bainite + martensite + retained austenite + carbide. Then, temper at an appropriate temperature to obtain a high-toughness structure. | ||
Performance Comparison of Different Heat Treatment Processes
| Heat Treatment Process | Dureza HRC | Impact Toughness aᴋ / (J/cm²) | Retained Austenite (Volume Fraction, %) | Tapping Plate Life / x10⁴ pieces | Wear Loss/mg |
| 980°C heating, oil quenching | 66.5 | 14.1 | 13.2 | 4 | — |
| 980°C heating, 180°C graded quenching 50min | 65.8 | 15.8 | — | 5 | — |
| 980°C heating, 270°C isothermal 3h | 62.5 | 15.9 | — | 6 | 11.9 |
| 980°C heating, 270°C isothermal 4h | 60 | 17.7 | 15.02 | — | — |
| 980°C heating, 270°C isothermal 5h | 59 | 16.8 | — | — | — |
| 980°C heating, 180°C pre-quenching 35min, 270°C isothermal 1h | 64.6 | 14.6 | — | 12 ~ 15 | 8.2 |
| 980°C heating, 180°C pre-quenching 35min, 270°C isothermal 2h | 46.2 | 14.9 | 18.31 | 12 ~ 28 | — |
| 980°C heating, 180°C pre-quenching 35min, 270°C isothermal 3h | 63.8 | 15.2 | — | — | — |
Note: All samples were tempered twice at 180°C, 1.5h each time.
Relationship between Quenching Temperature and Hardness
| Temperatura de enfriamiento/°C | 875 | 900 | 925 | 950 | 975 | 1000 | 1050 | 1100 |
| Dureza HRC | 54.5 | 57 | 60 | 62.5 | 65 | 66 | 64 | 59.5 |
Templado
Tempering Specification
| Purpose of Tempering | Heating Temperature/°C | Tempering Time (h) | Number of Tempers | Dureza HRC |
| Relieve stress, stabilize structure | 180 ~ 200 | 2 | 1 | 60 ~ 62 |
| Relieve stress, reduce hardness | 320 ~ 350 | 2 | 1 | 57 ~ 58 |
Nota: The tempering temperature is generally 180-200°C, with a hardness ≥ 60 HRC. To avoid cracks caused by EDM and grinding and to improve the mold’s toughness, it is often tempered below 400°C. The hardness after tempering is 54 ~ 58HRC. The temper brittleness range is 275 ~ 375°C, which should be avoided as much as possible during tempering.
Relationship between Tempering Temperature and Hardness
| Tempering Temperature/°C | Not Tempered | 200 | 300 | 400 | 450 | 500 | 550 | 600 | 650 |
| Dureza HRC | 65 | 63 | 62 | 60 | 60 | 60 | 59.5 | 57.1 | 44 |
Nota: 955°C oil quenching.
Cr12 Tool Steel Applications
It is predominantly selected for manufacturing components that require high wear resistance but are subjected to relatively low impact loads.
Specific applications include:
- Cold shearing blades and cutters
- Drill bushings
- Gauges
- Punches
- Thread rolling plates and dies
- Stamping and punching dies
- Wire drawing dies
- Cold extrusion dies
- Coining and embossing dies
- Deep drawing dies
