Cast Steel Parts Supplier in China – OEM Carbon & Alloy Steel Castings
YBMETAL is a precision-cast steel parts supplier to global OEMs across the industrial, construction, transportation, and energy sectors. With full-process capabilities and in-house machining, we provide custom carbon and alloy steel castings, heat-treated, machined, and certified to international standards.
What Is Cast Steel? – Properties, Grades & Industrial Uses
Cast steel is a metal casting made primarily from carbon steel or alloy steel, offering superior tensile strength, toughness, and wear resistance compared to iron castings. It is widely used for high-load, impact-prone, and safety-critical applications where ductile iron may not be sufficient.
- ZG230–450, ZG270–500, GS-45
- ASTM A27 (Grade 60-30, 70-36)
- ASTM A148 (105-85, 115-95 for high strength)
- AISI 4130, 4140 (alloy steels)
International Carbon Steel Grade Equivalents, GB, ASTM, JIS, DIN, BS, NF Comparison
| GB | ASTM | BS | JIS | NF | DIN |
| 08F | 1006 | 040A04 | S09CK | C10 | |
| 08 | 1008 | 045M10 | S9CK | C10 | |
| 10F | 1010 | 040A10 | XC10 | ||
| 10 | 1010,1012 | 045M10 | S10C | XC10 | C10,CK10 |
| 15 | 1015 | 095M15 | S15C | XC12 | C15,CK15 |
| 20 | 1020 | 050A20 | S20C | XC18 | C22,CK22 |
| 25 | 1025 | S25C | CK25 | ||
| 30 | 1030 | 060A30 | S30C | XC32 | |
| 35 | 1035 | 060A35 | S35C | XC38TS | C35,CK35 |
| 40 | 1040 | 080A40 | S40C | XC38H1 | |
| 45 | 1045 | 080M46 | S45C | XC45 | C45,CK45 |
| 50 | 1050 | 060A52 | S50C | XC48TS | CK53 |
| 55 | 1055 | 070M55 | S55C | XC55 | |
| 60 | 1060 | 080A62 | S58C | XC55 | C60,CK60 |
| 15Mn | 1016,1115 | 080A17 | SB46 | XC12 | 14Mn4 |
| 20Mn | 1021,1022 | 080A20 | XC18 | ||
| 30Mn | 1030,1033 | 080A32 | S30C | XC32 | |
| 40Mn | 1036,1040 | 080A40 | S40C | 40M5 | 40Mn4 |
| 45Mn | 1043,1045 | 080A47 | S45C | ||
| 50Mn | 1050,1052 | 030A52 | S53C | XC48 |
Benefits of Cast Steel Castings for OEM Applications
- ✅ High mechanical strength and toughness: Cast steel outperforms cast iron in tensile strength, shock resistance, and fatigue life — ideal for parts under heavy mechanical load.
- ✅ Excellent weldability and heat treatment capability: Steel castings can be normalized, quenched, tempered, or annealed to modify hardness, ductility, and structure.
- ✅ Adaptable for complex parts: Capable of casting heavy-duty structural shapes with optimized core design, including undercuts and thick sections.
- ✅ Superior resistance to impact and fatigue: Perfect for high-vibration or crash-resistant components in mining, rail, automotive, and heavy equipment.
- ✅ Machinable and surface-treatment friendly: Supports CNC finishing, nitriding, phosphating, coating, and galvanizing based on application needs.
Limitations of Cast Steel Castings
- ❌ Higher cost and energy consumption: Steel casting involves higher melting temperatures and material cost compared to iron, and requires more energy and alloy control.
- ❌ Shrinkage and stress control complexity: Steel contracts more than iron during cooling, requiring an advanced feeding system and simulation to prevent porosity or cracks.
- ❌ Slower casting cycle: Longer solidification and post-processing times reduce production speed for high-volume parts.
- ❌ Tooling and defect risk: More sensitive to gating design and process variations; stricter quality controls needed for dimensional consistency.
Typical Applications of Custom Cast Steel Components
- Railway couplers, suspension arms, and bogie frames
- Construction machine brackets, crusher parts
- Mining drill heads, support arms, shovel buckets
- Pressure-resistant pump and valve housings
- High-load bearing parts and frames
YBmetal’s Cast Steel Casting Capabilities & Services
- Weight range: 5 kg – 3,000 kg
- Steel grades: carbon steel, alloy steel, stainless steel (on request)
- Molding methods: resin sand, green sand, investment casting
- Heat treatment: normalizing, quenching + tempering
- CNC machining: milling, turning, boring
- Quality: UT / MT / RT, tensile & hardness test, CMM & 3D scan
- Certifications: ISO 9001, PPAP, material certs
Why YBMETAL Is a Trusted Cast Steel Foundry in China
YBMETAL works with ISO 9001 / IATF 16949 certified steel foundries in China. We support full engineering review, optimize casting design for cost and performance, and as a Cast steel parts supplier, we deliver fully machined steel parts for your global projects.