Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears

Model NO.
SNCM431/31CrNiMo8
Technique
Cold Drawing/Hot Rolled/Cold Rolled/Welded
Shape
Bar
Surface Treatment
Cold Drawn/Black/Peeld/Turned/Centerless Grinding
Heat Treatment
Annealed, Quenched, Tempered
Delivery Time
According to The Inventory Situation
Product Application
Automotive Industry/Industrial Equipmen/Aerospace
Price
to Be Confirmed Based on Order Details
Transport Package
Standard Packaging
Specification
According to order
Trademark
ZEICIN
Origin
China
Production Capacity
10000 Ton / Year
Reference Price
$ 270.00 - 810.00
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Product Description

Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears
Product Description

SNCM431/31CrNiMo8 Alloy Steel Round Bar for Automotive Shafts and Gears

SNCM431 / 31CrNiMo8 is a nickel-chromium-molybdenum alloy steel known for its high strength, toughness, and wear resistance . After quenching and tempering, it provides stable mechanical properties and excellent fatigue resistance, making it suitable for heavy-duty applications.

This alloy steel round bar is widely used in the automotive industry for shafts, gears, axles, and transmission parts , as well as in engineering machinery and industrial equipment that require durability under high stress and impact.


Similar Grades

ZEICIN Grade ISO GB BS JIS DIN/EN
SNCM431
31CrNiMo8
30Cr2Ni2Mo
823M30
SNCM431
30CrNiMo8/1.6580


Main Chemical Composition%

C Si Mn S P Cr Mo Ni
0.26-0.34 ≤0.40 0.30-0.60 ≤0.035 ≤0.025 1.80-2.20 0.30-0.50 1.80-2.20


Heat Treatment

Process Temperature Cooling Result
Soft Annealing 650-700ºC Slow cooling ≤ 248 HB
Normalizing 850-880ºC Air cooling Improved machinability
Hardening 830-880ºC Oil quenching High hardness & strength
Tempering 540-680ºC Air cooling Better toughness, less brittleness
Our Advantages

Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears

Production process

Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears

Major Equipment

1.  Electric Arc Furnace
2. ESR
3. 5T Forging Machine
4. Vacuum Annealing Furnace
Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears
Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears
5.  Non-destructive Detector
6. Rolling Mill
7. Drawing Mill
8. Spray Forming
Surface condition
Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears
Applications

4340 / G43400 is widely used for:

  • Automotive industry : shafts, gears, axles, transmission parts

  • Engineering machinery : spindles, couplings, heavy-duty machine components

  • Industrial equipment : bearings, hydraulic parts, wear-resistant components

  • Aerospace : high-strength structural parts

SNCM431 / 31CrNiMo8 alloy steel provides high strength, toughness, and fatigue resistance , making it ideal for demanding applications under heavy load and impact.

 
Packaging & Shipping
 
Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears
Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears
Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears
Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears
Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears
Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears Sncm431/31crnimo8 Alloy Steel Round Bar for Automotive Shafts and Gears
 
FAQ

Q1: Do you accept trial orders?
A1: Yes, we accept trial orders if the exact size is in stock.

Q2: What is your delivery time?
A2: If the goods are in stock, delivery time is generally 5-15 days. If the goods are not in stock, it may take 15-20 days, depending on the order quantity.

Q3: Do you offer discounts for bulk orders?
A3: Yes, we offer discounts for bulk orders. The specific discount will depend on the order quantity and cooperation terms. Please feel free to contact us for more information.

Q4: What is your product packaging like?
A4: Our products are packaged accordingly in standard industrial packaging to ensure safety during transport. If you have special packaging requirements, please specify them when placing your order, and we will package your items accordingly.

Q5: What payment methods do you support?
A5: We accept a variety of payment methods, including T/T, L/C, Alipay, PayPal, etc. The specific payment method can be arranged flexibly based on the order amount and customer needs.

 

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