JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
| Payment Terms | L/C, T/T, Western Union |
| Supply Ability | 20Ton per week |
| Delivery Time | 5 - 12 days based on the quantity |
| Packaging Details | standard packing for export |
| Products Name | Alloy Steel Round Bar |
| Diameter | 10 - 350mm |
| Length | 6m |
| Tech | Hot rolled |
| Service | Cutting |
| MOQ | 1 Ton |
| Loading Port | Shanghai Port |
| Standard | ASTM EN GB |
| Brand Name | DELTA |
| Model Number | 31CrMoV9 |
| Certification | ISO |
| Place of Origin | China |
View Detail Information
Explore similar products
ASTM A29/A29m Hot Rolled Alloy Steel Round Bars SAE4340 10-350mm
EN DIN Standard 41CrAlMo7 Alloy Steel Round Bar Diameter 10 - 350mm SCM645 Alloy
EN 1.8507 (34CrAlMo5-10) Nitriding Steel Round Bar Diameter 10 - 300mm Custom
ASTM A322 SAE4140 Steel Round Bar Hot Rolled Grade 4140
Product Specification
| Payment Terms | L/C, T/T, Western Union | Supply Ability | 20Ton per week |
| Delivery Time | 5 - 12 days based on the quantity | Packaging Details | standard packing for export |
| Products Name | Alloy Steel Round Bar | Diameter | 10 - 350mm |
| Length | 6m | Tech | Hot rolled |
| Service | Cutting | MOQ | 1 Ton |
| Loading Port | Shanghai Port | Standard | ASTM EN GB |
| Brand Name | DELTA | Model Number | 31CrMoV9 |
| Certification | ISO | Place of Origin | China |
| High Light | 500mm 31crmov9 Alloy Steel Rod ，Large Diameter 31crmov9 Alloy Steel Rod ，300mm Alloy Steel Rod | ||
31CrMoV9 Alloy Steel Rod Large Diameter 300 - 500mm Cutting Any Length
Products Specification
| Products Name | 31CrMoV9 Alloy Steel Round Bar |
| Diameter | 10 - 500 mm |
| Length | 6m or custom cutting any length as request |
| Type | Hot Rolled |
| Brand | BAOSTEEL DELTA DONGBEI HUAXI SHAGANG.etc |
| MOQ | 1 Ton |
| Loading Port | Shanghai Port |
| Packing | packing by steel wire rope |
| Deliver time | 5 - 7 days for stock materials |
| Other Grade | Q195,Q235,10#,20#,35#,45#,Q215,Q345,12Cr1Mov,15CrMo,304,3 16,20Cr,40Cr,20CrMo,35CrMo,42CrMo,40CrNiMo,GCr15,65Mn,50Mn, 50Cr,3Cr2W8V,20CrMnTi,5CrMnMo ,38CrMoAl, 31CrMoV9 |
| Standard | ASTM GB EN DIN |
| Application | Structure and Industrial |
| Standard Diameter | 10 12 15 18 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 180 200 210 220 230 250 270 300 320 330 350 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500 |
31CrMoV9 is a chromium-molybdenum-vanadium (Cr-Mo-V) alloy structural steel known for its high strength, excellent toughness, and superior heat resistance. The addition of vanadium (V) enhances grain refinement, improving creep resistance and fatigue strength, making it suitable for high-stress and high-temperature applications.
Germany/EU Standard: DIN EN 10083-3 (Quenched and tempered steels)
Equivalent International Standards:
ISO: 34CrMoV9 (similar composition)
USA (AISI/SAE/UNS): 4137 (similar, but lacks vanadium), 4140 (common alternative, no V)
Japan (JIS): SCM435 (similar Cr-Mo steel, lower V)
UK (BS): 722M24 (similar to En19B, no V)
France (NF): 35CD4 (similar Cr-Mo steel)
| 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 |
| 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.)
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.
| 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 |
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.
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.
Would you like additional details on heat treatment or welding procedures?
Company Details
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...
Get in touch with us
Leave a Message, we will call you back quickly!