What is custom steel CNC machining?

We produce steel parts to your specific design—your dimensions, tolerances, material, and finish. No catalog items. Every job is unique and built to your requirements.

What steel grades can you machine for custom orders?

Carbon steels (1018, 1045, 12L14), alloy steels (4130, 4140, 4340, 8620), and tool steels (A2, D2, O1, S7). We also machine specialty grades upon request.

Is there a minimum order quantity for custom steel parts?

No. We machine single prototypes, small batches, and high-volume production runs with the same quality standards.

Can you make custom steel parts from existing samples?

Yes, we reverse-engineer physical samples when drawings are unavailable. We'll measure the part, create a CAD model, and machine replacements to match.

What tolerances can custom steel machining achieve?

Standard holds ±0.02-0.05mm. Precision holds ±0.01mm. Grinding achieves ±0.002mm on critical features.

What is the typical lead time?

Prototypes in 3-5 business days. Production orders in 10-20 business days.

Do you provide material certification?

Yes, all materials are supplied with mill test reports and full traceability.

Custom Steel

Custom steel CNC machining is the precision processing of steel workpieces manufactured to customer-defined specifications. Steel offers exceptional mechanical properties—high tensile strength, hardness, wear resistance, and fatigue strength—making it the most widely specified material for load-bearing and high-stress applications. The material is available in multiple grades: carbon steels, alloy steels, and tool steels.

Custom steel machining encompasses milling, turning, drilling, boring, and grinding operations. Tolerances range from ±0.02mm to ±0.05mm for standard work, with precision grinding achieving ±0.002mm on critical features. Surface finishes as-machined reach Ra 1.6–3.2μm, with grinding achieving Ra 0.2–0.8μm. Every custom order is unique—your design, your tolerances, your material, your finish.

Our CNC Machining Services

From prototype to production — reliable quality, on-time delivery

We provide precision CNC machining services for a wide range of materials including aluminum, steel, stainless steel, copper, brass, titanium, PEEK, PTFE, acetal, nylon, and other engineering plastics. Our manufacturing capabilities cover 3-axis, 4-axis, and 5-axis CNC milling, as well as CNC turning, suitable for both prototype development and high-volume production runs.

With ISO 9001:2015 certification and a commitment to quality, we serve customers across aerospace, automotive, medical, electronics, industrial equipment, and consumer goods industries. Our in-house capabilities include surface finishing, anodizing, powder coating, heat treatment, and inspection with CMM and optical measurement equipment.

We offer competitive pricing, flexible lead times, and full material traceability. From simple brackets to complex precision components, we deliver parts that meet your specifications with reliable quality and on-time delivery.

Case StudiesMore+

SLINAR - Precision CNC Milled 1045 Mild Steel Cavity Connection Valve with High Sealing Performance

Precision CNC Milled 1045 Mild Steel Cavity Connection Valve with High Sealing Performance-mild_steel

Materials

Mild Steel S275JR

Mild steel S275JR | 1.0044 | Fe430B

As a low carbon steel specifications S275 provides low strength with good machinability and is suitable for welding

Understand Mild Steel S275JR

Mild Steel A36

Mild steel A36 | 1.025 | Fe 410

Mild steel A36 (CNC) is a common structural steel with good weldability. Suitable for a variety of industrial applications. Susceptible to corrosion.

Understand Mild Steel A36

Mild Steel S235JR

Mild Steel S235JR | 1.0038 | Fe 360 B

S235JR is a hot rolled non-alloy structural steel. It has good plasticity, toughness and weldability, certain strength and good cold bending properties.

Understand Mild Steel S235JR

Mild Steel 1045

Mild steel 1045 | 1.0503 | C45 | EN8

Mild steel 1045 (CNC) is a medium carbon steel with good weldability and machinability, high strength and good impact resistance. Susceptible to corrosion.

Understand Mild Steel 1045

Mild Steel S355J2

Mild steel S355J2 | 1.0577 | 1522H | Fe 510 D

S355J2 has a high tensile strength. Compared to other carbon steels, it has high electrical conductivity but low thermal conductivity and low ductility.

Understand Mild Steel S355J2

Mild Steel 1018

Mild steel 1018 | 1.1147 | C18 |16Mn

Mild steel 1018 (CNC) is a general-use alloy with good machinability, weldability, toughness, strength. Susceptible to corrosion.

Understand Mild Steel 1018

Applications

Custom Automotive Components

Custom transmission shafts and gear blanks
Engine brackets and mounts to your design
Suspension components and steering linkages
Brake system components and custom fasteners
Motorsport and performance parts

Custom Aerospace Parts

Custom landing gear components
Engine mounts and structural brackets
Hydraulic actuators and manifold bodies
High-strength fasteners and fittings

Custom Industrial Equipment

Pump shafts, impellers, and valve bodies
Gear housings and drive system components
Machine tool components and fixture plates
Heavy equipment structural parts

Custom Tooling & Dies

Stamping dies and forming tools
Injection mold components
Cutting tools and wear parts
Jigs, fixtures, and gauges

Custom Oil & Gas Parts

Valve bodies and wellhead components
Connectors and high-pressure fittings
Downhole tool components

Capabilities

We specialize in custom CNC machining of steel parts manufactured to your exact specifications. Every order is unique—your design, your tolerances, your material, your finish. No minimum order quantity. We machine carbon steels (1018, 1045, 12L14), alloy steels (4130, 4140, 4340, 8620), and tool steels (A2, D2, O1, S7). Equipment includes 3/4/5-axis CNC milling, CNC turning with live tooling, and surface/cylindrical grinding. Tolerances held to ±0.02-0.05mm standard, ±0.01mm precision, ±0.002mm grinding. Full material certification and inspection documentation provided with every order. ISO 9001:2015 and AS9100D certified.

Finishes

Plating

Zinc Plating: Basic corrosion protection for carbon steel
Electroless Nickel: Uniform coating with hardness and corrosion resistance
Hard Chrome: Wear-resistant coating for shafts and bearing surfaces
Black Oxide: Mild corrosion protection with dark appearance

Coating

Powder Coating: Durable polymer finish in any color
PTFE / Teflon: Low-friction non-stick surface
Phosphate Coating: Base for paint adhesion, corrosion protection

Heat Treatment

Quench & Temper: Increases hardness and strength
Case Hardening: Hardened surface with tough core
Nitriding: Surface hardening with minimal distortion
Annealing: Softens for improved machinability

Mechanical Finishes

Grinding: Precision surface finish with tight tolerances
Polishing: High-gloss reflective surface
Bead Blasting: Uniform matte texture
Tumbling: Edge deburring and surface smoothing

Technical Specs

Steel Grade	Type	Tensile (ksi)	Yield (ksi)	Hardness	Machinability	Common Uses
1018	Carbon	63	53	126 HB	Excellent	General purpose, shafts, pins
1045	Carbon	91	77	179 HB	Good	Gears, axles, bolts
12L14	Carbon	78	60	163 HB	Excellent	Screw machine parts, fittings
4130	Alloy	97	63	197 HB	Good	Aircraft, motorsport, tubing
4140	Alloy	95	60	197 HB	Good	Shafts, gears, tooling
4340	Alloy	108	68	217 HB	Fair	Landing gear, crankshafts
8620	Alloy	90	60	180 HB	Good	Gears, camshafts, pins
A2	Tool	230	—	57-62 HRC	Poor	Dies, punches, tooling
D2	Tool	248	—	58-64 HRC	Poor	Cutting tools, dies, wear parts

Parameter	Capability
Max Part Size (Milling)	2,000mm x 800mm x 600mm
Max Part Size (Turning)	600mm diameter x 1,500mm length
Standard Tolerance	±0.02 – 0.05mm
Precision Tolerance	±0.01mm
Grinding Tolerance	±0.002mm
Surface Finish (As-Machined)	Ra 1.6 – 3.2μm
Surface Finish (Ground)	Ra 0.2 – 0.8μm
Min Order Quantity	No minimum
Lead Time (Prototypes)	3 – 5 business days
Lead Time (Production)	10 – 20 business days

FAQs

What is custom steel CNC machining?

We produce steel parts to your specific design—your dimensions, tolerances, material, and finish. No catalog items. Every job is unique and built to your requirements.
What steel grades can you machine for custom orders?

Carbon steels (1018, 1045, 12L14), alloy steels (4130, 4140, 4340, 8620), and tool steels (A2, D2, O1, S7). We also machine specialty grades upon request.
Is there a minimum order quantity for custom steel parts?

No. We machine single prototypes, small batches, and high-volume production runs with the same quality standards.
Can you make custom steel parts from existing samples?

Yes, we reverse-engineer physical samples when drawings are unavailable. We'll measure the part, create a CAD model, and machine replacements to match.
What tolerances can custom steel machining achieve?

Standard holds ±0.02-0.05mm. Precision holds ±0.01mm. Grinding achieves ±0.002mm on critical features.
What is the typical lead time?

Prototypes in 3-5 business days. Production orders in 10-20 business days.
Do you provide material certification?

Yes, all materials are supplied with mill test reports and full traceability.

Services

Industries

Cases