5Cr3Mn1SiMo1V is a grade under the Chinese GB standard, representing a high-toughness, impact-resistant tool steel. Its equivalent steels include AISI/ASTM S7 in the United States and DIN W-Nr. 1.2355 in Germany.

1. Chemical Composition(GB/ 1299-2000)

C	Si	Mn	Cr	Mo	V	PAG	S
0.45-0.55%	0.20-1.00%	0.20-0.90%	3.00-3.50%	1.30-1.80%	≤0.35%	≤0.030%	≤0.030%

2. 5Cr3Mn1SiMo1V Steel Forging Process Specification

Artículo	Temperatura de calentamiento (°C)	Initial Forging Temp (°C)	Final Forging Temp (°C)	Método de refrigeración
Lingote de acero	1120 – 1150	1150 – 1200	900	Enfriamiento lento
Palanquilla de acero	1150 – 1200	1000 – 1150	850	Enfriamiento lento

3. 5Cr3Mn1SiMo1V Steel Heat Treatment Process Specification

3.1 Precalentamiento

Plan preliminar de tratamiento térmico	Parámetros del proceso
Recocido isotérmico tras la forja	Heating Temp: 800-820°C, Soak: 2-3h, Isothermal Temp: 700-720°C, Soak: 3-5h, furnace cool to 550°C then air cool, Hardness after annealing ≤229 HBW
Recocido general después de la forja	Heating Temp: 800-820°C, Soak: 2-3h, furnace cool to 550°C then air cool, Hardness after annealing ≤229 HRC

3.2 Quenching and Tempering

Especificación de enfriamiento			Especificación de templado
Quenching Temp (°C)	Método de refrigeración	Dureza HRC	Temperatura de revenido (°C)	Dureza HRC
940 – 955	Refrigeración por aire o aceite	56	160 – 180	56 – 58

4. Mechanical Properties of 5Cr3Mn1SiMo1V

5Cr3Mn1SiMo1V steel is a high-impact-resistant tool steel. Its elevated chromium content enhances hardenability. Silicon and manganese improve strength and resistance to tempering. Molybdenum and vanadium refine the grain structure, further increasing hardenability and elevating the steel’s overall performance. Additionally, with a chromium content exceeding 2.5% by mass, this steel exhibits excellent resistance to hydrogen embrittlement and oxidation at moderate temperatures.

5. Aplicaciones

5Cr3Mn1SiMo1V steel exhibits high toughness and moderate oxidation resistance at elevated temperatures, making it suitable for manufacturing tools and dies that operate under high impact loads. It is also well-suited for producing hammer forging dies and similar applications.