Sourcing large steel castings is a high-stakes decision: a single slag pot, stern post or turbine casing can weigh dozens of tons, and a quality failure means costly downtime. This guide explains what to look for in a cast steel parts supplier, and how Partscasting — with an annual capacity of 100,000 tons — delivers custom steel castings from 5 to 300 tons for buyers worldwide.

What Does a Cast Steel Parts Supplier Do?

A professional cast steel parts supplier converts your 2D or 3D drawings into finished, machined components. The full process includes pattern making, casting simulation, pouring, heat treatment, rough and finish machining, and non-destructive testing. Choosing a supplier with all of these capabilities in-house reduces lead time and eliminates coordination risk between multiple vendors.

Key Capabilities to Evaluate Before You Order

• Weight range: confirm the supplier can pour your part in a single piece. Partscasting casts steel parts from 5 kg up to 300 tons.
• Casting simulation: software such as ProCAST predicts shrinkage and porosity before pouring, cutting rework rates significantly.
• Machining & heat treatment: annealing, normalizing, quenching and tempering, plus CNC machining to ±0.05 mm.
• Quality certification: ISO 9001 system, UT/MT/RT inspection, and acceptance of third-party inspection (SGS, BV, TÜV).

Typical Cast Steel Parts We Manufacture

• Slag pots — 5–300 t, for metallurgical plants (ZG230-450 or per drawing)
• Stern posts — 5–300 t, for shipbuilding
• Rudder horns — 5–300 t, carbon steel and manganese steel
• Steam turbine casings — 5–300 t, for power generation
• Large gears and girth gears — up to 300 t, for cement and mining mills
• Crusher frames, mill housings, kiln tyres and other custom castings

Materials and Standards We Work With

Dimensional tolerances follow ISO 8062-3; hardness is tested per ASTM E10, and every heat is verified by spectrometer analysis.

How to Get a Quote

Send your drawings (PDF, STEP or IGS) through our contact page. Our engineers provide DFM feedback within 48 hours, and you will receive pricing within 2 business days. MOQ is 1 piece, with typical lead times of 45–90 days depending on weight and heat treatment requirements.

Partscasting is a cast steel parts supplier based in China, with an annual production capacity of 100,000 tons, serving buyers in North America, Europe, Southeast Asia and the Middle East.



Frequently Asked Questions

What is the maximum weight of steel castings you can produce?

We cast steel parts from 5 tons to 300 tons in a single piece — with an annual production capacity of 100,000 tons — including slag pots up to 95 t, stern posts up to 60 t and steam turbine casings up to 80 t.

What materials do you offer for cast steel parts?

Carbon steel (ZG230-450, ZG270-500, ASTM A216 WCB), manganese steel (ZGMn13 / Hadfield steel, ASTM A128) for high-impact wear parts, and low-alloy steel (42CrMo, ASTM A217) — cast per your drawings or samples.

When should I choose manganese steel instead of carbon steel?

Choose manganese steel (ZGMn13) for parts under repeated impact, such as crusher jaws and hammer linings — it work-hardens under load. Choose carbon steel (ZG270-500) for structural parts like slag pots, rudder horns and frames where weldability and lower cost matter.

Do you provide machining and heat treatment?

Yes. Rough and finish machining to ±0.05 mm, plus annealing, normalizing, and quenching & tempering are all completed in-house.

What is the MOQ and lead time?

MOQ is 1 piece. Typical lead time is 45–90 days depending on weight, complexity and heat treatment requirements.

Can you cast from my drawings? Do you support OEM?

Yes. Send 2D/3D drawings (PDF, STEP, IGS). Our engineers run casting simulation (ProCAST) and provide DFM feedback within 48 hours.

What inspection and certifications do you provide?

ISO 9001 certified. Chemical composition per heat, mechanical properties, UT/MT/RT testing, and third-party inspection (SGS, BV, TÜV) before shipment.

How do I get a quote for custom steel castings?

Submit drawings via the quote form or email. You will receive pricing within 2 business days.

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