DIN 1.2367 Tool Steel | X38CrMoV5-3

Different from the high-temperature H13 hot work tool steel, the high molybdenum property of 1.2367 steel makes its advantages more obvious under continuous high temperature conditions.

1.2367 steel, as a special tool steel that takes into account both economy and versatility, has high strength and hardness, good toughness, excellent wear resistance and thermal fatigue performance.

1.2367/X38CrMoV5-3 steel is usually supplied in annealed state with a hardness range of ≤235HBW, which makes the steel have better cutting performance during processing.

DIN 1.2367/X38CrMoV5-3 STEEL CHEMICAL COMPOSITION

Grade	C	Si	Mn	P	S	Cr	Mo	V
1.2367	0.35-0.40	0.3-0.5	0.3-0.5	≤0.03	≤0.02	4.8-5.2	2.7-3.2	0.4-0.6

Key Features:
✅ High Molybdenum (Mo): Resistance to temper softening (600°C hardness > 38 HRC)
✅ Medium Vanadium (V): Refines carbides and improves wear resistance
✅ Chromium (Cr) 5%: Resistance to oxidation corrosion

DIN 1.2367 STEEL RELATED STANDARD & EQUIVALENT GRADE

China/GB : 4Cr5Mo2V

USA/ASTM :H11 Mod

Japan/JIS :SKD61 Mod

DIN 1.2367 STEEL FORGING

Initial Forging Temperature：1100-1120℃
Final Forging Temperature：above 850℃
Forging Ratio：above 4:1
Post-Forging Treatment:For 1.2367 steel, slow cooling is required after forging, spheroidizing annealing is recommended

DIN 1.2367 STEEL HEAT TREATMENT

Softening Annealing For 1.2367 Steel

Temperature: 780-800°C
Holding time: 2-4 hours (cooling to 500°C with the furnace)
Target hardness: ≤229 HB
Organization requirements: spheroidal carbides (spheroidization rate ≥90%)

1.2367 Steel Quenching Process

Preheating temperature:650°C × 30min
Quenching temperature:1020-1030°C
Holding time:30min + 6min/cm
Cooling medium:High-speed nitrogen (≥5bar) or graded oil quenching

Key control: Temperature > 1030°C will lead to grain coarsening (> ASTM Grade 5), while < 1020°C will result in insufficient Mo₂C dissolution.

Tempering Process of 1.2367 Steel

First stage: 550°C × 2h → eliminate quenching stress
Second stage: 600-620°C × 2h × 2 times (core hardening range)
– 550°C is the hardness valley (only 46-48 HRC)
– 600°C reaches the peak hardness (50-52 HRC)
– 620°C still maintains 48-50 HRC

DIN 1.2367 Steel Tempering vs Hardness Diagram

1.2367 STEEL PROPERTIES

Properties	Value Range	Test Conditions
Room Temperature Hardness	50-52 HRC	After Tempering at 600°C
High Temperature Hardness	500°C: 42-44 HRC	Continuous Holding for 2 Hours
Tensile Strength	1850-1950 MPa	ASTM E8
Yield Strength	1650-1750 MPa
Impact Toughness	40-45 J/cm²	Charpy V-Notch (20°C)
Thermal Conductivity	28.5 W/(m·K)	500°C Steady State Method (ISO 18755)
Coefficient of Thermal Expansion	12.3×10⁻⁶/K	20-500°C (ASTM E228)