I. Compositional Characteristics

• CrV: Contains 0.8%-1.1% Cr (enhances corrosion resistance via oxide film) and 0.1%-0.25% V (balances strength/toughness). For example, CrV auto repair wrenches (HRC58-60) retain stable operation after 200 low-temperature (-20℃) tests and show no deformation after 50,000 torque cycles.
• CrMo: Adds 0.15%-0.3% Mo to Cr, boosting high-temperature stability (inhibits grain growth). At 400℃, its tensile strength attenuation is 22% lower than CrV, but costs rise by ~18%.

II. Core Performance (860℃ Quenching)

1. Hardness & High-Temp Stability:
   • CrMo (HRC52-56): Only 8% hardness loss after 2h at 500℃ (ideal for high temps).
   • CrV (HRC58-62): 15% hardness loss at 500℃ (higher short-term load capacity but poor high-temp resistance).
2. Low-Temp Toughness & Process Adaptability:
   • CrV: 27J low-temp impact energy (23% higher than CrMo’s 22J), suitable for cold environments. Its performance can be fine-tuned via heat treatment (5% less hardness loss, 12% more toughness).
   • CrMo: Narrow heat treatment window, better for standardized production.

III. Application Scenarios

1. Continuous High-Temp (>300℃): Choose CrMo (e.g., turbocharger bolts: 0.03% relaxation rate after 1,000h at 350℃ vs. CrV’s 0.12%).
2. High-Torque/Low-Temp: Opt for CrV (e.g., mine shafts: withstands 500N・m torque at HRC60, 30% lower fracture risk at -10℃ than CrMo).
3. Cost-Sensitive Civil Use: Prefer CrV (25%-30% cheaper than CrMo, 68% market share in 2025 for civil tools).

IV. Selection Tips & Innovation

• Hybrid Scenarios: Use CrMoV steel (adds V to CrMo) for high-temp + high-torque needs (≤10% hardness loss at 500℃, 25J impact energy).
• Cost Control: Free steel samples and process optimization services reduce trial costs by 15%.
• Core Principles: Prioritize CrMo for high temps, CrV for low temps/high torque; balance lifecycle costs.

Appendix: Typical Grades

• China GB/T: 35CrMo, 42CrMo
• USA AISI/SAE: 4135, 4140
• Japan JIS: SCM435, SCM440
• Germany DIN: 34CrMo4 (1.7220), 42CrMo4 (1.7225)
• EU EN: 34CrMo4, 42CrMo4

II. Typical Chromium-Vanadium Steel (CrV) Grades

• China GB/T: 40CrV, 50CrVA
• USA AISI/SAE: 6150
• Japan JIS: SUP10, SUJ2 (Vanadium-Modified Type)
• Germany DIN: 22CrV4 (1.7513), 50CrV4 (1.8159)
• EU EN: 51CrV4

Transport packaging method

For different products, we tailor various packaging options to match different transportation environments, ensuring that each delivery arrives promptly and safely.

Expanded sheet metal processing capabilities

We can offer you more customized processing for your production, such as slitting, leveling, and more. If needed, we can also provide technical support and process services for heat treatment.