440C Stainless Steel Bar
Diameter: 2mm – 300mm
Length: 1000mm – 6000mm (Custom sizes available)
Form: Round Bar, Hex Bar, Square Bar, Billet
Surface Finish: Black, Peeled, Polished, Turned, Centerless Ground
Test: UT, SGS testing, TUV etc
Certification：Provide MTC with chemical and mechanical test results
440C Bar is a high-carbon martensitic stainless steel renowned for its exceptional hardness, outstanding wear resistance, and good corrosion resistance. With a high chromium content and optimal carbon levels, 440C Stainless Steel Bar is one of the hardest and most durable stainless steel grades available, making it the ideal choice for applications requiring extreme abrasion resistance and structural integrity. Our 440C bars undergo stringent quality control to ensure superior performance in the most demanding environments.
Specifications
|
Parameter |
Details |
|
Diameter |
2mm – 300mm |
|
Length |
1000mm – 6000mm (Custom sizes available) |
|
Form |
Round Bar, Hex Bar, Square Bar, Billet |
|
Surface Finish |
Black, Peeled, Polished, Turned, Centerless Ground |
|
Standard |
ASTM A276, ASTM A479, DIN 1.4125, EN 10088-3 |
|
Condition |
Annealed, Hardened & Tempered, HRC 55-60 available |
Chemical Composition
|
Element |
Content (%) |
|
C |
0.95 – 1.20 |
|
Si |
≤ 1.00 |
|
Mn |
≤ 1.00 |
|
P |
≤ 0.040 |
|
S |
≤ 0.030 |
|
Cr |
16.00 – 18.00 |
|
Mo |
≤ 0.75 |
|
Fe |
Balance |
Mechanical Properties
|
Property |
Annealed |
Hardened (Tempered) |
|
Tensile Strength |
758 MPa |
1965 MPa |
|
Yield Strength |
450 MPa |
1900 MPa |
|
Elongation |
14% |
2% |
|
Hardness |
269 HB |
55 – 60 HRC |
|
Impact Toughness |
–– |
8 J (min) |
Equivalent Grades
|
Standard |
Grade |
|
UNS |
S44004 |
|
DIN |
1.4125 |
|
EN |
X105CrMo17 |
|
JIS |
SUS440C |
Why Choose Baohui Steel?
Full Material Traceability
We provide full Material Test Certification (MTC EN 10204 3.2) with every shipment, ensuring chemical and mechanical compliance.
Rigorous Quality Control
Each batch undergoes ultrasonic testing (UT), hardness verification, and macro-etch tests to ensure internal soundness and consistency.
Third-Party Validation Available
Optional SGS, TÜV, and Bureau Veritas inspection reports ensure impartial quality confirmation.
Trusted by Global Clients
We serve 1,000+ clients across Russia, Turkey, Italy, Poland, the USA, India, Mexico, France, and the UK.
Proven Client Retention
85% of our customers place repeat orders-a testament to consistent quality and reliable service.
Global Supply Capability
We have successfully supplied 440C Stainless Steel Bar to critical projects in aerospace, automotive, and industrial sectors worldwide.
Global Project Supply Record of 440C Stainless Steel Bar
|
Project |
Country |
Application |
|
Aerospace Landing Gear Parts |
USA |
High-strength shafts |
|
Medical Instrument Manufacturing |
Germany |
Surgical blades |
|
Automotive Valve Systems |
Japan |
Wear-resistant components |
|
Food Processing Line |
Netherlands |
Cutting blades & dies |
|
Industrial Knife Production |
UK |
Precision cutting tools |
FAQ
Q: Can 440C stainless steel be machined easily?
A: Machining is best performed in the annealed state. Post-machining heat treatment is required to achieve full hardness.
Q: What is the maximum service temperature?
A: 440C can be used up to 425°C (800°F) continuously. Prolonged exposure above this may lead to tempering.
Q: Do you provide custom heat treatment?
A: Yes, we supply 440C bars in annealed, hardened, or tempered conditions per customer specifications.
Q: Is 440C corrosion-resistant?
A: It offers good corrosion resistance in mild environments but is not suitable for highly corrosive applications like marine settings.
Request a Quote – Reach Out Today!
Elevate your project with certified 440C Stainless Steel Bar trusted by industry leaders worldwide. Custom Sizes & Finishes Available – Inquire Now!
WhatsApp: 8613468954786
Email:baohui@bhsteelpipe.com
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