ODM Carbon Steel Casting Service & Quotes

While both grades represent unalloyed carbon steels for high-temperature service in pressure vessels and valves, ASTM A216 Grade WCC permits a maximum carbon content of 0.25% (vs. 0.30% in WCB) while raising allowable manganese up to 1.20% (vs. 1.00% max in WCB). Consequently, WCC achieves a higher specified minimum yield strength (275 MPa / 40 ksi) compared to WCB (250 MPa / 36 ksi) while preserving superior weldability and ductile-to-brittle impact energy margins. Both grades require normalizing or normalizing and tempering post-shakeout to refine the pearlite-ferrite grain structure.

Shrinkage porosity is governed by localized thermal moduli and solidification timing. During initial DFM, our foundry engineers perform complete numerical simulation using AnyCasting / MAGMAsoft to visualize hot-spot formation. We place exothermic insulating riser sleeves over thermal junctions and implement internal or external steel chills to enforce directional solidification toward feeder heads. In critical pressure-containing sections, vacuum-assisted silica sol pouring minimizes gas entrapment, validated by ultrasonic testing per ASTM A609 Level 1 or 2 before CNC finish machining.

For as-cast raw surfaces produced via Silica Sol Investment Casting, we adhere to ISO 8062-3 CT4 to CT6 (typically ±0.20mm for dimensions up to 50mm, and ±0.40mm up to 150mm). For precision sand casting, we achieve CT8 to CT10. Following precision multi-axis CNC finish machining in our Shenzhen facility, critical features (e.g., bearing bores, seal counter-bores, flange bolt circles) are routinely controlled to ±0.005 mm (5 microns) with surface finishes down to Ra 0.4 μm, verified on our Zeiss coordinate measuring machines.

Every shipment includes an EN 10204 Type 3.1 Inspection Certificate containing actual ladle chemical spectral analysis (C, Si, Mn, P, S, Cr, Ni, Mo, Cu, V), room-temperature mechanical tensile/yield/elongation test data, heat-treatment temperature and soak-time charts, Charpy V-notch impact values (including low-temperature testing down to -46°C for ASTM A352 LCB), and comprehensive CMM dimensional inspection records. Level II certified NDT reports (MPI, PT, UT, RT) and RoHS/REACH compliance declarations are supplied per purchase specification.

Yes. We support agile design iterations through multiple pathways: 3D Printed Sand Molds (Binder Jetting) and SLA/SLS 3D printed sacrificial wax patterns for direct investment casting without creating permanent aluminum injection tooling. This enables clients to receive real cast-steel test articles in alloys such as 1045 or 4140 within 7 to 10 calendar days for benchtop validation, stress testing, and fit checks prior to investing in multi-cavity aluminum tooling for mass production.

We enforce strict legal and technical NDAs prior to receiving your 2D drawings or 3D STEP/IGES files. Because you deal directly with our Shenzhen manufacturing and engineering facility—with no middleman trading houses—your designs remain within our encrypted internal engineering network. Tooling dies are customer-dedicated, serial-coded, and never repurposed, transferred, or showcased to unauthorized third parties.