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 A2 çelik, 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	Ay	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

Kritik Nokta	Ac₁	Acsantimetre	Bayan
Sıcaklık/°C	795	—	168

2.2 Cr5Mo1V Steel Linear Expansion Coefficient

Sıcaklık /°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

Yoğunluk / (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

Öğe	Isıtma Sıcaklığı/°C	İlk Dövme Sıcaklığı/°C	Son Dövme Sıcaklığı/°C	Soğutma Yöntemi
Çelik Külçe	1100 ~ 1150	1050 ~ 1100	850 ~ 900	Yüksek sıcaklıkta tavlama, çukur soğutma veya kum soğutma
Çelik Kütük	1050 ~ 1100	1000 ~ 1050	850 ~ 900	Çukur soğutma veya kum soğutma

4. Heat treatment of Cr5Mo1V Steel

4.1 Ön ısıtma

Ön Isıl İşlem Planı	İşlem Parametreleri
Dövme Sonrası Genel Tavlama	Heating temperature is 840 ~ 870°C, hold for 2 ~ 3h; furnace cool to below 550°C then air cool, hardness ≤248HBW
Dövme Sonrası İzotermal Tavlama	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 Söndürme

① Recommended Quenching Process Specification

Plan	First Preheating Temperature/°C	Second Preheating Temperature/°C	Söndürme Sıcaklığı/°C	Soğutma	Sertlik HRC
BEN	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

Söndürme Sıcaklığı/°C	875	900	960	980	1020	1050
Sertlik HRC	46.5	54	64.5	64.5	63	58

4.3 Temperleme

① Recommended Tempering Process Specification

Söndürme Planı	Temperleme Sıcaklığı/°C	Öfke Sayısı	Sertlik HRC
BEN	180 ~ 220	1	60 ~ 64
II	510 ~ 520	2	57 ~ 60

② Effect of Tempering Temperature on Hardness

Quenching Condition	Temperleme Sıcaklığı/°C	100	200	300	400	450	500	520	580
954°C Söndürme	Sertlik HRC	64.5	62	58	57	56	59	56	51
982°C Söndürme	Sertlik HRC	65	62	58	58	56	58	57	51.5

5. Mekanik Özellikler

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

Temperleme Sıcaklığı/°C	Sertlik HRC	Tensile Strength/MPa	Yield Strength/MPa	Uzama (%)	Alanın Azaltılması (%)
530	54.1	1849	—	—	—
593	46.7	1596	576	5.0	13.9

Note: 980°C air cooling.

6. Uygulamalar

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.