描述
Key Specifications
|
Parameter
|
Specification
|
|---|---|
|
Grade
|
439 / SUS439 / 1.4510
|
|
Chromium Content
|
17.0-17.5%
|
|
Stabilization
|
Titanium (Ti)
|
|
[C+N] Content
|
≤250 ppm (Typical: 170-200 ppm)
|
|
Standard
|
ASTM A240/A240M-24, JIS G 4305, GB/T 3280
|
|
Surface Finish
|
2B (Standard), Brushed
|
|
Delivery Condition
|
Solution Annealed
|
|
Certification
|
EN10204 3.1
|
Chemical Composition
Typical YONGJIN Production Data
|
Element
|
Content (%)
|
ASTM A240 Standard (%)
|
|---|---|---|
|
Carbon (C)
|
0.008-0.011
|
≤0.030
|
|
Silicon (Si)
|
0.335-0.427
|
≤1.00
|
|
Manganese (Mn)
|
0.313-0.349
|
≤1.00
|
|
Phosphorus (P)
|
0.026-0.027
|
≤0.040
|
|
Sulfur (S)
|
0.0008-0.0012
|
≤0.030
|
|
Nickel (Ni)
|
0.111-0.153
|
≤0.50
|
|
Chromium (Cr)
|
17.15-17.31
|
17.00-19.00
|
|
Nitrogen (N)
|
0.008-0.010
|
≤0.040
|
|
Titanium (Ti)
|
0.291-0.323
|
≥4×(C+N)
|
Data based on EN10204 3.1 certified heats from Certificate No. SKPZ20250900119
[C+N] Control Performance
|
Heat Number
|
C (%)
|
N (%)
|
[C+N] (ppm)
|
|---|---|---|---|
|
S250624AB18
|
0.010
|
0.008
|
180
|
|
S250624AB19
|
0.010
|
0.010
|
200
|
|
S250707AB20
|
0.009
|
0.008
|
170
|
|
S250707AB18
|
0.008
|
0.010
|
180
|
|
S250629AB21
|
0.011
|
0.008
|
190
|
All heats comply with ultra-pure standard [C+N] ≤ 250 ppm
Mechanical Properties
Typical YONGJIN Production Data
|
Property
|
YONGJIN Actual
|
ASTM A240 Minimum
|
Compliance
|
|---|---|---|---|
|
Tensile Strength (T.S)
|
437-460 MPa
|
≥415 MPa
|
✓ Exceeds
|
|
Yield Strength (Y.S)
|
255-268 MPa
|
≥205 MPa
|
✓ Exceeds
|
|
Elongation (Elong)
|
33-36%
|
≥22%
|
✓ Exceeds
|
|
Hardness (HV)
|
141-145 HV
|
≤192 HV
|
✓ Compliant
|
Mechanical Performance by Thickness
|
Thickness (mm)
|
Tensile Strength (MPa)
|
Yield Strength (MPa)
|
Elongation (%)
|
|---|---|---|---|
|
0.70
|
452
|
266
|
36
|
|
0.80
|
460
|
268
|
33
|
Data based on EN10204 3.1 certified test reports (Certificate No. SKPZ20250900119), gauge length 50mm
Key Characteristics
1. Superior Formability
Ultra-low [C+N] content at 170-200 ppm ensures excellent ductility with high r-values, supporting deep drawing operations for complex appliance components including washing machine drums and sink bowls.
2. Excellent Weldability
Titanium stabilization prevents intergranular corrosion in welded zones, enabling reliable fabrication without post-weld heat treatment. Recommended for TIG and MIG welding processes.
3. Corrosion Resistance
18% chromium content provides significantly better atmospheric corrosion resistance compared to 409L, suitable for indoor and moderate outdoor environments including urban and light industrial atmospheres.
4. Cost Stability
Nickel-free composition eliminates exposure to volatile nickel markets, providing 15-20% cost savings compared to 304 austenitic stainless steel with stable long-term pricing.
5. Surface Quality
Uniform ferritic structure delivers consistent 2B or Brushed surface finish, ideal for visible appliance panels, architectural trim, and decorative applications.
Typical Applications
|
Industry
|
Application
|
Component Examples
|
|---|---|---|
|
Home Appliances
|
Washing Machines
|
Drum tubs, door panels, structural frames
|
|
Home Appliances
|
Dishwashers
|
Inner tubs, door liners, rack supports
|
|
Home Appliances
|
Refrigerators
|
Interior panels, door liners, evaporator covers
|
|
Kitchen & Sanitary
|
Sinks
|
Single/double bowl sinks, drainboards
|
|
Architecture
|
Building Trim
|
Handrails, decorative strips, cladding supports
|
|
Automotive
|
Structural Parts
|
Fuel tanks, seat frames, brackets
|
|
Industrial
|
Tanks & Vessels
|
Non-critical storage tanks, piping
|
Processing Guidelines
Welding
|
Parameter
|
Recommendation
|
|---|---|
|
Filler Metal
|
439 matching wire or 308L for enhanced corrosion resistance
|
|
Process
|
TIG, MIG, Resistance welding
|
|
Preheat
|
Not required for thickness <6mm
|
|
Interpass Temperature
|
≤150°C
|
|
Post-Weld Treatment
|
Pickling/passivating recommended for maximum corrosion resistance
|
Forming
|
Parameter
|
Recommendation
|
|---|---|
|
Minimum Bend Radius
|
1.5× thickness (90° bend)
|
|
Deep Drawing
|
Suitable for draw ratios up to 2.0:1
|
|
Lubrication
|
Use adequate lubrication to prevent galling
|
|
Springback
|
Higher than austenitic, compensate in tool design
|
|
Annealing Between Stages
|
Recommended for severe drawing operations
|
Heat Treatment
|
Parameter
|
Specification
|
|---|---|
|
Delivery Condition
|
Solution Annealed
|
|
Annealing Temperature
|
750-850°C
|
|
Cooling
|
Air cool or water quench
|
|
Stress Relieving
|
200-300°C if required for fabricated components
|
Surface Finishing
|
Finish Type
|
Description
|
Application
|
|---|---|---|
|
2B
|
Cold rolled, annealed, pickled – standard mill finish
|
Standard for most applications, appliances, general fabrication
|
|
Brushed
|
Mechanical polishing with abrasive belts (No.4 finish)
|
Architectural trim, handrails, decorative panels, elevator interiors
|
Quality Assurance
Certification
Every YONGJIN 439 coil includes:
- EN10204 3.1 material certificate with actual heat analysis
- Mechanical test results (tensile, hardness, elongation)
- Surface quality inspection report
- Full traceability from melting to finished coil
- Country of Origin: China
Management System Certifications
- ISO 9001:2015 Quality Management System
- ISO 14001:2015 Environmental Management System
- ISO 45001:2018 Occupational Health and Safety
- PED 2014/68/EU Pressure Equipment Directive
- AD 2000-Merkblatt W0 Welding Approval
Available Specifications
Standard Sizes
|
Parameter
|
Range
|
|---|---|
|
Thickness
|
0.3mm – 3.0mm
|
|
Width
|
1219mm, 1250mm,
|
|
Coil Weight
|
Up to 22 tons per coil
|
|
Inner Diameter
|
508mm, 610mm
|
Custom Specifications
Custom thickness, width, and surface finishes available upon request. Minimum order quantity applies for non-standard specifications.
Why Choose YONGJIN 439
|
Advantage
|
Description
|
|---|---|
|
Ultra-Pure Quality
|
[C+N] consistently controlled at 170-200 ppm, below 250 ppm standard
|
|
Certified Traceability
|
EN10204 3.1 certificate for every coil with actual test data
|
|
Dual Production Base
|
China and Vietnam facilities ensure supply chain flexibility
|
|
Technical Support
|
Application engineering assistance for material selection and processing
|
|
Competitive Pricing
|
Direct mill pricing with transparent cost structure
|
|
Fast Delivery
|
7-10 days for standard specifications, 15-25 days for custom
|
Related Products
|
Grade
|
Key Feature
|
Best For
|
|---|---|---|
|
409L
|
11% Cr, cost-effective
|
Automotive exhaust systems
|
|
436L
|
Mo-enhanced corrosion resistance
|
Exhaust manifolds, coastal applications
|
|
441
|
Nb-stabilized high-temperature strength
|
High-temp industrial equipment
|
|
443J1
|
21% Cr, 304 alternative
|
Architecture, premium appliances
|
|
443NT
|
Dual-stabilized enhanced performance
|
Premium appliances, hygiene surfaces
|
Download Resources
Contact Information
|
Method
|
Details
|
|---|---|
|
Email
|
morgan@yongjinss.com
|
|
Phone/WhatsApp
|
+86 177 2277 5646
|
|
Company
|
Foshan Yongjin New Material Co., Ltd.
|
|
Office
|
Chencun, Shunde, Foshan, Guangdong, China
|
|
Production
|
Fujian Ningde (China), Bac Giang (Vietnam)
|
Response Time: Within 24 hours on business days
Frequently Asked Questions
Q1: What is the typical [C+N] content for YONGJIN 439?
A: YONGJIN 439 typically achieves [C+N] between 170-200 ppm, well below the 250 ppm ultra-pure standard. Actual values are provided in EN10204 3.1 certificates for each heat.
Q2: Can 439 replace 304 in my application?
A: For many indoor and moderate outdoor applications, 439 can replace 304 with 15-20% cost savings. For severe corrosion environments or high-temperature applications above 400°C, consider 443J1 or 443NT.
Q3: What is the minimum order quantity?
A: Standard specifications: 1 ton minimum. Custom specifications: 5 tons minimum. Contact us for specific requirements.
Q4: Do you provide sample for testing?
A: Yes, sample are available for qualified customers. Contact our sales team for sample policy and lead time.
Q5: What is the delivery time?
A: Standard specifications in stock: 7-10 days. Custom specifications: 15-25 days.
