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31CrMoV9 Alloy Steel Rod - Large Diameter 300-500mm
31CrMoV9 Alloy Steel Rod Large Diameter 300-500mm with custom cutting round disc capabilities for industrial applications.
Material Overview
31CrMoV9 is a chromium-molybdenum-vanadium (Cr-Mo-V) alloy structural steel renowned for its high strength, excellent toughness, and superior heat resistance. The addition of vanadium enhances grain refinement, improving creep resistance and fatigue strength, making it ideal for high-stress and high-temperature applications.
Specifications & Standards
Primary Standard: DIN EN 10083-3 (Quenched and tempered steels) Equivalent International Standards:
ISO: 34CrMoV9 (similar composition)
USA (AISI/SAE/UNS): 4137 (similar, lacks vanadium), 4140 (common alternative)
Japan (JIS): SCM435 (similar Cr-Mo steel, lower V)
UK (BS): 722M24 (similar to En19B, no V)
France (NF): 35CD4 (similar Cr-Mo steel)
Chemical Composition (Typical, wt%)
Element
C
Si
Mn
Cr
Mo
V
P (max)
S (max)
Content
0.28-0.35
0.15-0.40
0.40-0.70
2.30-2.70
0.15-0.25
0.10-0.20
0.025
0.025
Mechanical Properties (After Heat Treatment)
Property
Tensile Strength (MPa)
Yield Strength (MPa)
Elongation (%)
Impact Energy (J)
Hardness (HB)
Typical Value
900-1100
700-900
≥12
≥40 (at 20°C)
270-320
Note: Properties vary based on heat treatment conditions, such as quenching & tempering.
Key Features & Advantages
High Strength-to-Weight Ratio - Ideal for load-bearing components
Excellent Heat Resistance - Performs well up to 500-550°C (932-1022°F)
Good Toughness & Fatigue Resistance - Suitable for dynamic loads
Weldability & Machinability - Can be welded with pre/post-heating
Vanadium-Enhanced Microstructure - Improves creep and wear resistance
Heavy Machinery: Gears, axles, high-load structural parts
Performance Summary: 31CrMoV9 is a high-performance alloy steel with excellent strength, heat resistance, and fatigue durability, making it ideal for critical engineering applications. Its closest equivalents are 34CrMoV9 (ISO/DIN) and 4137/4140 (USA), though vanadium content varies. For high-temperature and high-stress environments, 31CrMoV9 remains a superior choice over standard Cr-Mo steels.
Product Images
Contact us for additional details on heat treatment or welding procedures for your specific application requirements.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
