Istanbul, Turkey-based Semih Metals is a reliable manufacturer and supplier of Stainless Steel 440C bars and rods with high-carbon martensitic stainless steel products renowned for their superior hardness, wear resistance, and strength. With quality-oriented advanced manufacturing processes, Semih Metals offers 440C bars and rods with international standards and designed for challenging applications in industries like aerospace, tooling, medical, and precision engineering. The company guarantees consistent mechanical properties, tight tolerances on dimensions, and assured performance for every product.
Stainless Steel 440C is high-carbon martensitic stainless steel with around 1.0–1.2% carbon and 16–18% chromium. It provides the maximum hardness among all stainless steels, up to 58–60 HRC after heat treatment. It also gives good resistance to abrasion and wear, as well as good corrosion resistance in mild environments. But its corrosion resistance is less than that of austenitic stainless steels. 440C is magnetic and hardenable by heat treatment and hence is best suited for applications needing strength and edge retention.
| Specification | ASTM A479/ SA479 ASTM A276/ ASME SA276 |
|---|---|
| Grade | Stainless Steel 440C (UNS S44004) |
| Hex Bar size | 18 to 57mm (11/16″ – 2-3/4″) |
| Round bar size | OD 4mm to 500mm |
| Square bar size | 18mm to 47mm (11/16″- 1-3/4″) |
| Billet Size | 1/2″- 495mm Dia. |
| Rectangles Size | 33 x 30mm – 295 x 1066mm |
| Bright Bar | OD 4mm to 100mm |
| Tolerance | K12 H12, K10, H9, H11, H8, H13K9, H10, K11, or as per need |
| Flat bar size | 1/2” to 10” in thickness of 2 to 150mm |
| Angle bar size | 3*20*20~12*100*100 |
| Finish | centreless ground, Cold (bright) drawn, hot rolled, peeled, smooth turned, hot rolled annealed, slit rolled edge, Bright, Rough Turned, Grinding, Polish & Black |
| Form | Flat Bar, Hollow, Round, Square, Triangle, Rectangle, Half Round Bar, Rod, T-Bar, Precision Ground Bar, Hex (A/F), Blocks, Channel Bar, Threaded, Round Rod, Billet, Profiles, I/H Bar, Ingot, Rings, Forging etc. |
| Technique | 440C Stainless Steel Hot Rolled, Cold Drawn, Rod, Forged Round Bar, Cold Rolled |
| Condition | annealed, Hardened & tempered |
| Section | 3.0 -12.0 mm thickness, 80 x 40 to 150 x 75mm section |
| Channel Bar | 5.0 – 6.0mm thickness |
| Surface | Bright, Cold Drawn, Hot Rolled Pickled, Sand Blasting Finished, Polished, Hairline |
| Hollow Bar | 32mm OD x 16mm ID – 250mm OD x 200mm ID |
|
SS 440C |
Min |
Max |
|---|---|---|
|
Si |
– |
1.00 |
|
C |
0.95 |
1.20 |
|
Mo |
0.00 |
0.75 |
|
P |
– |
0.04 |
|
Ni |
– |
1.00 |
|
Mn |
– |
1.00 |
|
Cr |
16.00 |
18.00 |
|
S |
0.15 |
0.03 |
|
Element |
SS 440C |
|---|---|
|
Tensile (UTS)N/mm² |
1965 |
|
Temp°C |
20 |
|
Reductionof Area |
10 |
|
Elongation(50.8mm) %) |
2 |
|
0.2% YieldN/mm² |
1896 |
|
HardnessHRc |
57 |
|
STANDARD |
UNS |
WERKSTOFF NR. |
JIS |
|---|---|---|---|
|
SS 440C |
S44004 |
1.4125 |
SUS 440C |
Stainless Steel 440C Bars and Rods are known for their high hardness, achieving up to 58-60 HRC when heat-treated. This makes them ideal for applications requiring excellent wear and abrasion resistance.
Stainless Steel 440C offers good corrosion resistance in mild environments, but for more aggressive conditions (like exposure to saltwater), it is recommended to use more corrosion-resistant stainless steel grades like 316 or 317.
Stainless Steel 440C rods and bars find extensive applications in products where high wear resistance, strength, and hardness are essential. Bearing components, valve parts, high-performance knife knives, surgical tools, ball bearings, and precision instruments are among the common applications. For aerospace and automotive industries, 440C is utilized for parts that need close tolerances and high strength under mechanical loads. Its sharpness and resistance to wear make it very good for cutting dies and tools. It is not very good in very corrosive environments but is good in dry or slightly corrosive environments where hardness and longevity are desired.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Semih Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Istanbul, Turkey
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