What customization options are available?

We offer customization in diameter, length, heat treatment, and certification to match technical drawings.

What certifications are provided?

Mill Test Certificate (MTC) 3.1 is standard; additional certifications like chemical analysis reports are available.

What is the main application of this steel?

It is primarily used for automobile engine valves, exhaust valve components, and high-temperature fasteners.

Customizable 21-4n Valve Steel Bar for Enhanced Engine Efficiency

Name: Customizable 21-4n Valve Steel Bar for Enhanced Engine Efficiency
Brand: Dongtai Ruicheng Electromechanical Technology Co., Ltd.
SKU: 2155316092

Jiangsu, ChinaDongtai Ruicheng Electromechanical Technology Co., Ltd.

US$4,300.00-6,500.00

1 Ton

Product specifications

Model

Product profile

Type

Alloy Steel Bar

Standard

AISI, ASTM, DIN, JIS, GB, BS

Composition

21-4n Austenitic Heat-Resistant Steel Alloy

Model NO.

21-4N

Technique

Hot Rolled / Forged / Cold Drawn / Customizable

Shape

Bar

Surface Treatment

Black (as-Rolled) / Polished / Peeled

Special Use

High-strength Steel Plate, Wear Resistant Steel, High Temp & Oxidation Resistant Steel

Application

Automobile Engine Valves, Exhaust Valve Components

Material Type

21-4n Austenitic Valve Steel

Diameter Range

φ4.50mm-φ80.00mm

Heat Treatment Method

Annealing, Solution Treatment, Quenching

Surface Condition

Smooth, Free of Cracks & Defects

Primary Application

Automobile Engine Valves

Transport Package

Wooden Box

Specification

Per Customer's Requirement

Trademark

Rui Cheng

Origin

Dongtai City, China

Key features

21-4n Heat-Resistant Steel: Austenitic alloy offering high temperature strength, oxidation resistance, and wear resistance.

Multi-Technique Options: Available in Hot Rolled, Forged, Cold Drawn, and Precision Ground forms.

Trade Guarantee Protection: Order through guarantee system; deposit refunded if delivery fails or quality issues arise.

Certified Quality Control: Mill Test Certificate (MTC) 3.1 provided; 100% visual and function inspection.

Engineered for Valves: Ideal for automotive engine valves, exhaust components, and pneumatic systems.

Company profile

High Repeat Buyers Choice

Dongtai Ruicheng Electromechanical Technology Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 1 Year CertifiedNearest Port: Shanghai PortAverage Response Time: ≤1.27h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier is a combined metal-products manufacturing enterprise focused on wire surface-treatment equipment, with integrated R&D, design, production, sales, installation, commissioning, and after-sales support. It reports broad customization options, documented finished-product inspection instructions, and production equipment including bending, laser cutting, drilling and milling, welding, sawing, and laser engraving machines. Its export experience is limited to one year, with 21%–30% of sales from exports. Service procedures exist, but records are absent or approval documentation is incomplete. No SDK, overseas warehouse, showroom, overseas agent or branch, or offline trade-show participation is reported. Financial records are referenced by year, but no substantive financial results are provided. Environmental and fire-drill information is unknown.

Supplier typeThe supplier is identified as a combined company and a professional manufacturing enterprise for metal wire surface-treatment equipment. Its stated business scope includes sales of metal wire ropes and related products, chemical products excluding licensed chemicals, and technical services.

R&D capabilityThe supplier states that innovation is central to its development and reports a professional design and production team with senior engineers and technical personnel capable of customized solutions. However, it reports no available SDK, and no concrete patents, product innovations, or R&D performance metrics are provided.

Production capacityThe supplier identifies itself as a manufacturer with integrated R&D, design, production, sales, and service functions. Its listed equipment includes bending, laser cutting, drilling and milling, welding, sawing, and laser engraving machines, while its stated service system includes equipment production, installation, and commissioning.

Customization capabilityThe supplier explicitly reports customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also states that experienced technical personnel provide customized designs and solutions for varying technical requirements.