Custom Tailored Special Profiles
Hot rolled, cold drawn, cold rolled and hot extruded special profiles for automotive, machine tools, construction, linear guide rails, agriculture and many other applications.
Overview
We produce hot rolled, cold drawn and cold rolled special profiles which are used in various industries, such as automotive, machine tools and the construction industry, linear guide rails, as well as agricultural and other applications.
All profiles can be produced from a wide range of steel grades with additional heat treatment, including carbon steel, free cutting steel, alloy steel, stainless steel, nickel alloys, high temperature alloys and titanium alloy, as well as brass and copper alloys if required. If the steel grade is not determined by the customer, our engineers can advise an appropriate material depending on the application area and the requirements on the mechanical properties of the product.
Some application areas set high requirements on straightness and twisting. In such cases profiles can be additionally straightened on automatic presses to reach the desired parameters.
Send us your drawings or specific requirement and we manufacture to it. We produce samples first for you to inspect and test, then arrange volume production.
Hot Rolled Special Profiles
Larger sections up to 7000 mm² and lengths up to 12 m, supplied as rolled or cut to fixed length.
Cold Drawn Special Profiles
Close tolerance sections with a bright surface, delivered with stress relieving heat treatment where required.
Hot Extrusion Special Profiles
Extruded sections for geometries that cannot be produced economically by rolling or drawing.
Technical Data
| Surface | Ra below 40 µm, defects 0.3 mm max |
|---|---|
| Size tolerances | Up to 0.5 mm |
| Straightness | Standard 1.0 mm/m or less, on request 0.3 mm/m or less |
| Twisting | Standard 1°/m or less, on request 0.5°/m or less |
| Cross section | From 10 mm² up to 7000 mm² |
| Length | Up to 12 m or cut to fixed length |
| Surface roughness | Ra below 2.5 µm |
|---|---|
| Decarburisation | Below 0.1 mm |
| Straightness | Below 0.1 mm/m |
| Twisting | Below 0.25°/m |
| Size tolerances | Below 0.05 mm |
| Cross section | From 1 mm² up to 3800 mm² |
| Length | Up to 6 m or cut to fixed length |
Profiles We Have Produced
Application Areas
Each of these industries buys a different section, a different grade and a different delivery condition. All of them start from a drawing.
Automotive Industry
For the automotive industry Tianhao delivers a wide range of hot rolled and cold drawn profiles used for door hinges, valve cotters, pole shoes, truck wheels and other parts. Our engineers have developed a special steel grade for automotive customers which combines high mechanical properties with outstanding machinability, so tooling lasts longer and costs fall.
- Anchorages for vehicle seats and cardan joints
- Door hinges, leaf spring profiles, flat, T and trapezoidal profiles
- Slewing circles and profiles for engine, gearbox and wheels
- Compressor rotors, diesel equipment, locks and pole pieces for starter motors
- Truck wheel rims and rings
Linear Guides
The profiles are used to produce both the rails and the carriages of linear guides. They are generally produced in carbon steels, induction hardening alloy steels and case hardening steels.
Seals for Pipe Fittings
The profiles for the inserts in seal rings are made in martensitic stainless steels. These profiles have a special feature: their square edges.
Tooling for Woodworking
Special profiles for tool holders and stop blocks for blades, using carbon steels and case hardening steels.
Tool Industry
Special profiles are used for hand tools such as chisels, punches, hexagon and octagon keys, scrapers and files. Depending on the requirement, profiles are delivered hot rolled or cold drawn, and cold drawn profiles are delivered with stress relieving heat treatment.
- Diameter range between 1 mm and 50 mm
- Small profiles up to 6 mm in diameter can be delivered in coils
- Grades including C45, 51CrV4, 59CrV4, 102Cr6 and stainless grades
Pumps
Special profiles for shafts on submersible pumps, using both austenitic and martensitic stainless steel.
Railway Construction and Transport
Special profiles in long bars up to 8 m for seat fastening systems, or profiles that are custom cut and used in braking systems. Generally made in carbon steels or with anti-magnetic properties.
Electricity Power Stations
Special profiles used as hydro-electric energy stators, produced in steels and carbon steels, or stainless steels for specific applications in nuclear power stations.
Defence Industry
Special profiles for components in the defence industry, such as slides, breeches, levers, monoblocks and gas cylinder extractors. Steels with Cr-Mo or Cr-Mo-Ni are used, or other steels on the specific request of the customer.
Mechanical Engineering
Cold drawn special profiles for components used in machine tools. We manufacture profiles for telescopic steel curtains and T-nut profiles for the tables of CNC machines. For producers of sheet bending machines we manufacture hot rolled or cold drawn profiles for bending tools.
Agricultural Machinery
Agricultural power transmissions and special profiles for splined shafts in universal joints, using quenched steels and carbon steels. We produce a variety of hot rolled profiles, mainly beater bars and ploughshare profiles, which can be delivered in fixed lengths with holes. For tool and component producers we also supply cold drawn flat profiles in custom sizes to h9.
Sliding Systems
Prismatic, trapezoidal or complex geometry guides in bearing steel such as 100Cr6, case hardening steel such as Cf53, and carbon steel.
Printing Machinery
Special profiles used as tensioning guides, or as semi-finished products of more complex sections, using carbon steels.
Telescopic Slideways
U-shaped profiles and profiles for cursors, with or without the housing for ball bearings, in carbon steels and CrMo alloys. Depending on their end use these profiles are tempered and adjusted by the customer, or used in the condition they are supplied.
Various Applications
Padlocks and locking systemsWeaving machineryKnitting machinerySpinning machineryMachine toolsElectric power toolsAgricultural power transmissionsArchitecture and designElevator industryMining industryBuilding industryStandard profilesAgriculture industryLogistics and warehousingConveyor beltCranesElectric manure grabLifting trucksMonorail systemsStorage systems and metallic shelvesTrolleysDefence equipment
Frequently Asked Questions
What tolerance can you hold on a cold drawn profile
Size tolerances below 0.05 mm, straightness below 0.1 mm per metre, twisting below 0.25 degrees per metre, surface roughness Ra below 2.5 micrometres and decarburisation below 0.1 mm.
What tolerance applies to hot rolled profiles
Size tolerances up to 0.5 mm. Straightness is 1.0 mm per metre as standard and 0.3 mm per metre on request. Twisting is 1 degree per metre as standard and 0.5 degrees per metre on request. Surface is Ra below 40 micrometres with defects of 0.3 mm maximum.
How long can the bars be
Hot rolled profiles up to 12 m and cold drawn profiles up to 6 m, or cut to a fixed length. Profiles for railway seat fastening systems are supplied in long bars up to 8 m.
Which steel grades are available
A wide range with additional heat treatment if required: carbon steel, free cutting steel, alloy steel, stainless steel, nickel alloys, high temperature alloys, titanium alloy, as well as brass and copper alloys.
Can you improve straightness beyond the standard values
Yes. Where the application sets high requirements on straightness and twisting, profiles can be additionally straightened on automatic presses to reach the desired parameters.
How does an order start
Send us your drawings or specific requirement. We manufacture to it, produce samples first for your inspection and testing, and arrange volume production once the sample is approved.
Send Us the Cross Section
A dimensioned sketch is enough to start. Tell us the steel grade if it is fixed, the length and the annual quantity, and we will quote and produce a sample.