Carbon Steel Plate
Low carbon plate in 0-100mm for building frames bridge members and fabrication work
Specifications
Mild Steel Sheet
1045 C45 S45C CK45 Medium Carbon Steel Plate
Medium carbon engineering plate that machines soft and hardens on the working face
1045 C45 S45C 1.1191 CK45 steel plate is a medium carbon general engineering structural steel with good machinability and high tensile properties. It is specified by tool rooms die shops and earthmoving equipment builders who machine the part first and then harden only the working face. Delivery hardness is 18-25HRc so the plate still drills taps and mills on arrival instead of reaching your shop already hardened and unworkable. Thickness runs from 0.1mm to 500mm and the plate is cut to your size so a die blank or blade billet leaves the warehouse close to finished dimensions.
- Product Name — 1045 C45 S45C 1.1191 CK45 Steel Plate
- Grade — 1045 C45 S45C 1.1191 CK45
- Standards — BS EN GB AISI ASTM DIN JIS
- Thickness — 0.1mm-500mm or customized as required
- Width — 0-2000m or customized as required
Why It Is Specified
Key Benefits of 1045 C45 S45C 1.1191 CK45 Steel Plate
Machinable on Arrival at 18-25HRc
Plate is delivered at 18-25HRc so profiles holes and pockets can be cut with ordinary shop tooling. Hardening is done afterwards on the surface that actually wears.
Cross Referenced Under BS EN GB AISI ASTM DIN and JIS
The same chemistry is listed as 1045 C45 S45C 1.1191 and CK45 so a drawing written to any of these systems can be filled from one stock item. That removes the grade argument between your designer and your buyer.
Surface Hardening Without a Brittle Core
Flame and induction hardening heat only to the wanted case depth before quenching in water or oil. The core stays tough enough to take impact while the case resists wear.
Quench and Temper Route to a Known Hardness
Water quenching from 820-870 degrees Celsius brings the plate to 201-269HB. The hardness target is documented so heat treatment can be repeated batch after batch.
Thickness Range From Thin Sheet to Heavy Block
Stock covers 0.1mm to 500mm so shim thickness parts and heavy die blocks come from the same grade. One approval covers both ends of the range.
Plate and Bar From the Same Grade
The grade is also supplied as round bar flat bar square bar hexagonal bar and pipe. A mixed bill of material for one assembly can be ordered against a single material approval.
Problems It Solves
What This Material Removes From Your Process
Plate That Arrives Too Hard to Machine
Pre-hardened plate forces a shop into grinding and EDM for work that milling would handle. Delivery hardness of 18-25HRc keeps conventional machining open and moves hardening to the end of the route.
Drawings Written to Different Standard Systems
One customer specifies C45 another S45C and a third 1.1191. All of them describe the same medium carbon steel so a single stocked grade covers the whole order book.
Tools That Wear at the Edge and Break at the Shank
Through hardening a whole tool makes it brittle. Flame and induction hardening reaches only the required case depth so the edge hardens and the body keeps its toughness.
Paying for Plate You Cut to Waste
Cut to size supply against your blank list removes the offcut you would otherwise buy store and eventually scrap.
Application Scenarios
Where It Is Used
Punching Dies and Screw Dies
Die bodies and screw dies where the tool must hold an edge under repeated loading and still be machinable before heat treatment.
Punches of Complicated Shape
Punches that carry a difficult profile and need toughness through the shank as well as hardness at the nose.
Roll Cutting Tool Industry
Scrapers serrated knives iron knives and drill bits produced in the roll cutting tool trade from cut plate blanks.
Loader Bulldozer and Excavator Parts
Earthmoving components where the section has to resist wear and impact in service on soil and rock.
General Engineering Structural Parts
Machined structural components that call for higher tensile properties than a plain low carbon plate provides.
Who It Is For
Buyers Who Specify This Product
- Tool and die makers buying blanks for punching dies screw dies and shaped punches
- Cutting tool manufacturers ordering plate for scrapers serrated knives and iron knives
- Earthmoving equipment builders specifying wear and impact parts for loaders bulldozers and excavators
- Machine shops that want plate soft enough to machine before flame or induction hardening
- Heat treatment shops sourcing a grade with a published austenitizing and quenching route
- Steel stockists carrying a medium carbon grade recognized across several standard systems
Technical Data
Specifications and Technical Features
Values below come from the product data published by Shandong Tianyu Metal Products. Confirm the exact grade and size against your order.
| Product Name | 1045 C45 S45C 1.1191 CK45 Steel Plate |
|---|---|
| Grade | 1045 C45 S45C 1.1191 CK45 |
| Standards | BS EN GB AISI ASTM DIN JIS |
| Thickness | 0.1mm-500mm or customized as required |
| Width | 0-2000m or customized as required |
| Technique | Hot rolled cold rolled |
| Delivery Hardness | 18-25HRc |
| Hardness After Water Quenching | 201-269HB quenched from 820-870 degrees Celsius |
| Surface | Nature or painted |
| Application | Loader bulldozer excavator |
| Processing Service | Bending welding decoiling cutting punching |
| Sample | Available |
| Certificate | Mill test certificate |
| Place of Origin | China |
Technical Features
- Grade 1045 C45 S45C 1.1191 CK45 medium carbon steel
- Standards BS EN GB AISI ASTM DIN and JIS
- Thickness 0.1mm-500mm or customized as required
- Width 0-2000m or customized as required
- Hot rolled black surface or cold drawn bright surface
- Delivery hardness 18-25HRc
- Water quenched at 820-870 degrees Celsius to 201-269HB
- Also supplied as round bar flat bar square bar hexagonal bar and pipe
Materials
- Medium carbon general engineering structural steel
- Grade equivalents 1045 C45 S45C 1.1191 and CK45
- Hot rolled black surface material for plate and heavy sections
- Cold drawn bright surface material where a cleaner finish is wanted
Certification
- Mill test certificate supplied with each shipment
Manufacturing
How It Is Made and Processed
Hot rolling or cold rolling to the ordered thickness
Black hot rolled or cold drawn bright surface finishing
Forging for large sizes where a forged section suits the part better
Annealing and furnace cooling before machining where required
Hardening from the austenitizing temperature with oil or water quenching
Flame or induction hardening to the wanted case depth followed by tempering
Cutting to the ordered blank size
Marking packing and loading for export
Quality Control
Checks Before It Ships
- Mill test certificate issued against the ordered grade
- Delivery hardness verified against the 18-25HRc range
- Post quench hardness checked against 201-269HB where heat treatment is ordered
- Thickness measured against the ordered size before cutting
- Blank dimensions checked against the cutting list before packing
- Surface condition inspected for the ordered nature or painted finish
Customization
What We Can Change on Your Order
- Cut to size blanks supplied against your blank list
- Thickness selected anywhere in the 0.1mm-500mm range
- Hot rolled black or cold drawn bright surface on request
- Heat treated delivery to 201-269HB instead of the standard 18-25HRc supply condition
- Bending welding decoiling cutting and punching carried out before shipment
- Matching round flat square or hexagonal bar supplied with the plate order
Comparison
1045 C45 S45C 1.1191 CK45 Steel Plate Against the Alternatives
| Low carbon structural plate | The medium carbon chemistry gives higher tensile properties and responds to flame and induction hardening which low carbon plate does not. |
|---|---|
| Alloy tool steel | 1045 costs less and machines more easily while still reaching 201-269HB after water quenching which is enough for many die and blade duties. |
| Pre-hardened die plate | Supply at 18-25HRc lets your shop machine the part first instead of grinding a hardened blank. |
| Forged bar cut into slices | Plate is the cheaper route for flat blanks while large sizes are better taken from forging where section size makes plate impractical. |
Use Guide
Specifying Handling and Welding Notes
- Machine the part in the as delivered 18-25HRc condition and harden afterwards
- Harden from the austenitizing temperature and quench in oil or water according to section thickness
- For flame and induction hardening heat quickly to the required case depth then quench in water or oil
- Temper after case hardening to release stress in the case without losing the hardness
- Water quench from 820-870 degrees Celsius where 201-269HB is the target
- Send the blank list with the order so plate arrives cut to size and ready to machine
Questions Buyers Ask
1045 C45 S45C 1.1191 CK45 Steel Plate FAQ
What thickness and width can you supply?
Thickness runs from 0.1mm to 500mm and width from 0-2000m, both customized as required. Cut to size supply is available so you can order finished blanks rather than full plates.
Is 1045 the same as C45 S45C and CK45?
Yes. 1045 C45 S45C 1.1191 and CK45 are the same medium carbon steel listed under different standard systems including BS EN GB AISI ASTM DIN and JIS.
What hardness does the plate arrive at?
Normal delivery hardness is 18-25HRc, which keeps the plate machinable. After water quenching from 820-870 degrees Celsius the hardness reaches 201-269HB.
Can you supply the same grade as bar or pipe?
Yes. The grade is normally supplied as plate, round bar, flat bar, square bar, hexagonal bar and pipe, and large sizes are better taken from forging.
Do you supply hot rolled or cold drawn material?
Both. Hot rolled material comes with a black surface and cold drawn material with a bright surface. Tell us which finish suits your machining route.
Can we get a sample before ordering production quantities?
Samples are available. Send the thickness and blank size you want to test and we will confirm what can be released.
Do you issue a mill test certificate?
Yes. A mill test certificate is issued for the ordered grade and travels with the material. Ask for the mill test certificate when you place the order.
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