50Mn is a medium-to-high carbon manganese steel widely used for parts that require high strength, wear resistance, and good toughness. It offers a balanced combination of hardness and ductility when properly heat treated, making it suitable for springs, gears, axles, and forged components.
This grade is known for its uniform structure, stable hardenability, and dependable mechanical performance, and it is one of the long-established steels in China’s quality carbon structural steel category.
Chemical Composition (% by weight)
C: 0.47–0.55
Si: 0.17–0.37
Mn: 0.70–1.00
P: ≤ 0.025
S: ≤ 0.025
Mechanical and Processing Features
50Mn steel is often selected for applications that demand strength and durability such as:
Automotive and railway components — axles, couplings, and leaf springs
Machine building — gears, spindles, and crankshafts
Mining and agricultural equipment — shafts and pins under impact load
Tools and dies requiring high surface hardness after quenching
General forgings and medium-duty mechanical parts
Equivalent Standards:
DIN: Ck55 / 1.1203
ASTM/SAE: 1055 (approx.)
JIS: S55C
Consistent Quality from ChinaSpecSteel
ChinaSpecSteel supplies 50Mn carbon structural steel manufactured by Jiyuan Iron & Steel Group, a leading producer of high-quality special steel in China.
The production follows a long-process route, combining ironmaking, steelmaking, and rolling, ensuring full control over composition and cleanliness.
What We Provide:
Hot-rolled and forged 50Mn bars and billets
Heat-treated or normalized materials per customer requirement
Custom sizes and precision cutting for OEM production
Mill test certificates with optional SGS/BV inspection
Competitive factory pricing with stable long-term supply capacity
Available Forms:
Round and square bars
Forged shafts and gear blanks
Annealed or quenched-and-tempered bars
Manufacturing Strength – Jiyuan Iron & Steel
Jiyuan Iron & Steel Group operates with a complete long-process production system, supported by advanced refining, rolling, and testing technology. The company’s facilities meet internationally recognized quality standards and deliver consistent metallurgical performance.
It is one of China’s most comprehensive production bases for special steel bars and wire rods, covering grades such as bearing steel, spring steel, cord steel, cold heading steel, gear steel, free-cutting steel, non-quenched and tempered steel, alloy structural steel, carbon structural steel, high-strength wear-resistant steel, tube billet steel, anchor chain steel, and continuous cast iron profiles.
Jiyuan also produces precision wire, heat-treated bars, bright bars, and fasteners, supplying the automotive, energy, machinery, and heavy-equipment industries in global markets.
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