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31CrMoV9 Alloy Steel Rod Large Diameter 300-500mm High Strength Heat Resistant Round Bar

Quantité de commande min	1 tonne
Prix	US $560-950 / Ton

Détails sur le produit

Numéro de modèle	31CrMoV9	Technique	Forgé
Traitement de surface	Brillant	Type d'alliage	Non-allié
Plage de diamètre	300 à 500 mm	Teneur en carbone	0,28-0,35 % en poids
Contenu en silicium	0,15-0,40 % en poids	Contenu de manganèse	0,40-0,70 % en poids
contenu de chrome	2,30-2,70 % en poids	Contenu en molybdène	0,15-0,25 % en poids
Contenu en vanadium	0,10-0,20 % en poids	Résistance à la traction	900 à 1100 MPa
Limite d'élasticité	700 à 900 Mpa	Élongation	≥12%
Dureté	270-320 HB
Mettre en évidence	Large Diameter 300-500mm Alloy Steel Rod , High Strength Steel Round Bar , Heat Resistant 31CrMoV9 Steel Bar

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Description de produit

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

International Equivalent Grades

Country	Standard	Equivalent Grade	Key Differences
Germany	DIN EN 10083-3	34CrMoV9	Higher C content
USA	AISI/SAE	4137, 4140	No vanadium (V)
Japan	JIS	SCM435, SNCM439	Different Cr-Mo-V balance
UK	BS	722M24 (En19B)	No vanadium
France	NF	35CD4	Similar Cr-Mo steel

Typical Applications

Power Generation: Turbine shafts, bolts, rotors
Aerospace: High-stress fasteners, landing gear components
Automotive: Crankshafts, connecting rods (high-performance engines)
Oil & Gas: Drill collars, pressure vessels
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.

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