4140 4340 Steel Rolling Hot Forged Ring

• Customization: Available
• After-sales Service: Yes
• Warranty: 1 Year
• Model NO.: 4140
• Alloy: Alloy
• Type: Equal
• Standard: GB, ASTM, JIS, AISI, DIN, BS
• Size: 1/2inch-64inch
• Payment Term: Tt /LC
• Price Term: Fca Fob CIF CFR;etc
• MOQ: 1 PCS
• Transport Package: Pack in Bundles, in Wooden Box, in Wooden Pallet
• Specification: CE, SGS, TUV
• Trademark: KM
• Origin: China
• Production Capacity: 5000tons Per Month

Product Description

4140 4340 Alloy Steel Flange Ring /  Alloy Steel Forged Parts

4140 and 4340 alloy steel forged flange rings provide high strength, toughness, and wear resistance for heavy-duty, high-stress applications in oil & gas, aerospace, and machinery industries.

Specification

Materials: AISI 4140 (chrome-moly) and AISI 4340 (nickel-chrome-moly) offer superior durability.

Production Methods: Hot forging, rolling, and custom CNC machining (turning, drilling, boring).

Hardness: Typically ranges from 163 BHN to 402 BHN, adjustable through heat treatment (annealing, normalizing, tempering).

Dimensions: Available in large sizes (500mm to 13,000mm) for heavy-duty components.
Applications: Used for shafting, gears, bearing housings, and structural components requiring high fatigue resistance.

Surface Treatment: Sandblasting, galvanizing, and polishing options are available.

Key Configurations

We tailor heat treatment to achieve required mechanical properties.

Available processes include:

Annealing

Normalizing

Normalizing and tempering

Quenching and tempering

Forged

in line inspection

UT Test

Technical Specifications

(Custom configurations available upon request.)

Pressure Rating ANSI	Class 150, Class 900, Class 2500, Class 300, Class 600,Class 1500
Production technique	Forged, Heat treated and machined
Shapes and Types we produce	Ring Type Joint (RTJ), Flat Face (FF), Small Tongue, Small Male-Female (SMF),Raised Face (RF), Large Tongue & Groove, Groove, Lap-Joint Face (LJF),Large Male-Female (LMF),
Most common Types	Threaded / Screwed / Forged / Plate

Drawings & Dimensions

Detailed CAD drawings and dimensional diagrams are available for download here or upon inquiry. Our engineering team can provide tailored designs to meet specific project requirements.

Company Profile

Guangzhou Kingmetal Steel Industry Co., LTD

Guangzhou Kingmetal Steel Industry Co., LTD is a leading Chinese manufacturer of Pipe, Fitting Flange and Valve with over 30 years of expertise. Certified with ISO 9001, CE, and GOST, we export to 50+ countries, offering reliable products and strict quality control.

Why Choose Us?

Other Products

OEM/ODM capabilities
Competitive pricing & bulk discounts
Fast shipping & customs clearance support
Turnkey project solutions

Pipe

Fitting

Flange

Valve

Bolt and Nut

FAQ

Q: What's the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.

Q: Can I request a customized bucket size?
A: Absolutely! We offer tailored attachments.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, Form E,COC,FTA etc.).

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.