1.2714 | 6F3 | 56NiCrMoV7 | 5CrNiMoV

Introduction to 1.2714 | 6F3 | 56NiCrMoV7 | 5CrNiMoV 

1.2714 (DIN)

A premium nickel-chromium-molybdenum hot work tool steel with 0.50-0.60% C, 1.50-1.80% Ni, and 0.45-0.55% Mo. Its optimized vanadium addition (0.07-0.12%) refines grain structure, delivering exceptional toughness (65% elongation) and thermal stability up to 550°C. Achieves 115-234 MPa tensile strength and 23 MPa yield strength through precise oil quenching (843-899°C) and tempering (300-700°F). The balanced alloy design minimizes decarburization risks while maintaining 212-229 HB hardness, ideal for stress-intensive operations requiring crack resistance.

6F3 (ASTM)

Characterized by moderate carbon content (0.55%) and chromium-nickel synergy (1.00% Cr, 1.00% Ni), this steel offers superior machinability with Brinell hardness <125 in annealed state. Its 65% elongation outperforms conventional tool steels, enabling remarkable deformation tolerance. The 0.75% Mo content enhances hardenability during oil quenching, achieving uniform hardness gradients. Low residual stress levels post-heat treatment (<23 MPa yield strength) make it uniquely resistant to fatigue failure under cyclic loading.

56NiCrMoV7 (EN)

Distinguished by a nickel-rich composition (1.50-1.80% Ni), this European-grade steel achieves exceptional thermal conductivity (35 W/m·K) and phase stability during rapid temperature shifts. Vanadium carbides (0.07-0.12% V) provide microstructural stability at sustained 500-600°C exposure. Delivers 241 HB hardness with controlled 0.50-0.60% carbon content, balancing wear resistance with shock absorption. Endothermic atmosphere hardening (CO/H2/N2 gas mix) ensures <0.1mm decarb depth for precision components.

5CrNiMoV (GB)

Chinese-developed alloy combining 0.50-0.60% C with 1.40-1.80% Ni and 0.10-0.30% V. Features a unique dual-phase microstructure after quenching, achieving 55-65% elongation without sacrificing 234 MPa tensile strength. Molybdenum (0.35-0.50%) enhances tempering resistance, retaining 90% hardness after 4-hour exposure at 400°C. Low silicon content (<0.35%) minimizes brittle phase formation, while chromium (0.80-1.10%) ensures uniform carbide distribution for isotropic mechanical properties.

Key Advantages Summary

1. Thermal Stability: 56NiCrMoV7 > 1.2714 > 5CrNiMoV > 6F3
2. Machinability: 6F3 (soft annealed) > 5CrNiMoV > 1.2714
3. Fatigue Resistance: 1.2714 (65% elongation) outperforms peers
4. Hardenability: 56NiCrMoV7 achieves full hardening at 100mm depth vs 80mm for 5CrNiMoV

Chemical Composition

Supply Form & Range

For 1.2581/ H21/3Cr2W8V/SKD5/X30WCrV9-3/2730/3X2B8Φ steel, we can provide round bars and plates. Round rods can be sawn to the length you need and used as single or multiple cut pieces. Grinding tool steel bars can be provided, offering high-quality precision finished bars for strict tolerances.

In addition, we can provide a variety of surface conditions of tool steels:Black；Peeled/Grinded;Turned/Machined/Bright/Milled

Customization of core parameters

Depending on your application scenario, we offer a full range of configurable manufacturing:

✓ Geometric size: Support millimeter precision size customization (tolerance ±0.05mm)

✓ Surface treatment: grinding/polishing/sandblasting can be specified (Ra0.4-6.3μm)

✓ Composition optimization: the ratio of C, Cr, Mo, V and other alloy elements can be adjusted (according to ASTM A681 standard)

Quality Test

We have 2 types of quality inspection, general quality test and high quality test.

1.General quality test include:

• Surface
• Chemical composition
• Size
• Tolerance
• UT testing
• Hardness.

2.High quality test include:

Cold work tool steel:

• Non-metallic inclusion
•  Eutectic carbide.

Hot work tool steel:

• Non-metallic inclusion
• Microstructure
• Band segregation
• Grain size.