Cr5Mo1V is a medium alloy air-hardening cold work tool steel, also classified as a high carbon medium chromium tool steel. It is recognized by the unified digital code T20503 and equivalent to American Aço A2, JIS SKD12 in Japan, and DIN 1.2363 in Germany. It is a versatile material, particularly suitable for applications that demand both good wear resistance and good toughness.

1. Chemical Composition(GB/T 1299—2000)

C	Si	Mn	Cr	Mo	V	P	S
0.95 – 1.05%	≤0,50%	≤1,00%	4.75 – 5.50%	0.90 – 1.40%	0.15 – 0.50%	≤0,030%	≤0,030%

2. Physical Properties of Cr5Mo1V Steel

2.1 Cr5Mo1V Steel Critical Temperature

Ponto crítico	Ac₁	Accm	Senhora
Temperatura/°C	795	-	168

2.2 Cr5Mo1V Steel Linear Expansion Coefficient

Temperatura /°C	20 ~ 100	20 ~ 300	20 ~ 500	20 ~ 700
Linear Expansion Coefficient α/ ×10⁻⁶°C⁻¹	8.2	11.3	12.4	12.9

2.3 Cr5Mo1V Steel Other Physical Properties

Densidade / (g/cm³)	Modulus of Elasticity E (Room Temperature) /MPa	Specific Heat Capacity cₚ/ [J/(kg·K)]
7.84	203000	460.55

3. Cr5Mo1V Steel Forging Process Specification

Item	Temperatura de aquecimento/°C	Temperatura inicial de forjamento/°C	Temperatura final de forjamento/°C	Método de resfriamento
Lingote de aço	1100 ~ 1150	1050 ~ 1100	850 ~ 900	Recozimento em alta temperatura, resfriamento em poço ou resfriamento em areia
Tarugo de aço	1050 ~ 1100	1000 ~ 1050	850 ~ 900	Resfriamento de poço ou resfriamento de areia

4. Heat treatment of Cr5Mo1V Steel

4.1 Pré-aquecimento

Plano Preliminar de Tratamento Térmico	Parâmetros do processo
Recozimento geral após forjamento	Heating temperature is 840 ~ 870°C, hold for 2 ~ 3h; furnace cool to below 550°C then air cool, hardness ≤248HBW
Recozimento isotérmico após forjamento	Heating temperature is 830 ~ 850°C, hold for 2h; isothermal temperature is 710 ~ 730°C, hold for 2 ~ 4h, furnace cool to 500°C then air cool or furnace cool to room temperature, hardness after annealing ≤248HBW

4.2 Têmpera

① Especificação do processo de têmpera recomendado

Plano	First Preheating Temperature/°C	Second Preheating Temperature/°C	Temperatura de têmpera/°C	Resfriamento	Dureza HRC
I	300 ~ 400	800 ~ 850	940 ~ 960	Air cooling or oil cooling	62 ~ 63
II	300 ~ 400	800 ~ 850	980 ~ 1010	Air cooling or oil cooling	62 ~ 65

② Effect of Quenching Temperature on Hardness

Temperatura de têmpera/°C	875	900	960	980	1020	1050
Dureza HRC	46.5	54	64.5	64.5	63	58

4.3 Têmpera

① Especificação do processo de têmpera recomendado

Plano de Têmpera	Temperatura de têmpera/°C	Número de temperamentos	Dureza HRC
I	180 ~ 220	1	60 ~ 64
II	510 ~ 520	2	57 ~ 60

② Effect of Tempering Temperature on Hardness

Quenching Condition	Temperatura de têmpera/°C	100	200	300	400	450	500	520	580
Têmpera a 954°C	Dureza HRC	64.5	62	58	57	56	59	56	51
Têmpera a 982°C	Dureza HRC	65	62	58	58	56	58	57	51.5

5. Propriedades Mecânicas

Cr5Mo1V steel is a free-hardening steel exhibiting high free-hardening properties. It features relatively low quenching distortion, high hardness, excellent wear resistance, and moderate toughness, delivering outstanding overall mechanical properties.

Mechanical Properties of Cr5Mo1V Steel after Tempering

Temperatura de têmpera/°C	Dureza HRC	Tensile Strength/MPa	Yield Strength/MPa	Alongamento (%)	Redução de área (%)
530	54.1	1849	-	-	-
593	46.7	1596	576	5.0	13.9

Note: 980°C air cooling.

6. Aplicações

Cr5Mo1V steel exhibits excellent comprehensive mechanical properties, making it particularly suitable for manufacturing tools and dies that require both high wear resistance and good toughness, as well as dimensional stability. Examples include rollers, punches, blanking dies, forming dies, rolling dies, wire drawing dies, and thread rolling dies. It is also used for certain types of shear blades.