Hirework Services
LIBERTY Speciality Steels offers hire work services across our UK sites in Stocksbridge, Brinsworth, Rotherham and Wednesbury. We have a strong heritage of providing conversion services for steel alloys, stainless steels and nickel alloys. This includes hirework remelting services, hirework rolling and hirework bright conversion with ultrasonic inspection.
REMELTED STEELS
| ESR – Electro Slag Remelted | |
|---|---|
| Melt Capacity (tonnes) | 2 x ESR furnaces – maximum 6t |
| Feedstock Material | ESR1 – Bloom (multiple potential sections) – EAF supply |
| ESR2 – 600mm x 3000mm Multi Fluted Ingots – VIM or EAF supply | |
| Output Ingot Sizes | ESR1 – 630mm x 2400mm nominal weight 5.8t |
| ESR2 – 700mm x 1700mm nominal weight 5.2t |
| VAR – Vacuum Arc Remelted | |
|---|---|
| Melt Capacity (tonnes) | 9 x VAR furnaces – maximum 10t |
| Feedstock Material | 450mm x 3000mm Round 2.8t nominal weight |
| 600mm x 3000mm Multi-Fluted 6t nominal weight | |
| 700mm x 3000mm Multi Fluted 8t nominal weight | |
| Output Ingot Sizes | 508mm x 1800mm Round Ingot 2.5t nominal weight |
| 660 or 760mm x 1800mm round ingots typically 4.8 to 6.8t |
ROLLING PROCESSES
Primary Rolling (Stocksbridge Billet Mill)
- Mill Design – 4 x reversing rolling stands
- Automated bar section gauges and pyrometry
- 19 gas fired soaking pits for heating blooms and ingots to the required temperature for the required time, depending on steel grade
- Feedstock – capable of accepting a range of ingot and bloom products
- Size Range – 76-381mm Round
- Shape Range – Round, Square, Rectangle
- Optional scarfing (surface removal by high pressure oxy-propane burners for improved surface quality)
- 4 x cooling beds, slow (pit) cooling, immediate annealing capability
Secondary Rolling (Thrybergh Bar Mill – Rotherham)
- Automated bar section gauges and pyrometry
- Gas fired, walking beam reheating furnace with 3 control zones
- Feedstock – 180mm Billet
- Size Range – 22-105mm Round
| Bar Products | |
|---|---|
| Hot Rolled Rounds | 76 – 381mm dia – Primary Bar 22 – 105mm dia – Secondary Bar |
| Turned Bar Rounds | 19 – 450mm dia |
| Drawn Bar Rounds | 8 – 90mm dia |
| Drawn Bar Hexagons | 10 – 36mm hx |
| Hot Rolled RC Squares | 70 – 457mm sq |
| Hot Rolled Slabs | Width 100 – 500mm Thickness 50 – 330mm |
| Hot Rolled Narrow Strip | Width 180 – 500mm (slit 26 – 470mm) Thickness 1-14mm +/- 0.06mm (coiled 19mm once as trial, also plate capability) |
| Heat Treatment | |
|---|---|
| Batch Furnaces | BBR – 6 x furnaces 18-190mm dia, 3.6-8.4m, 350-1050°C (1120°C) HVM – 6 x furnaces 18-400mm ida, 3.0-10.4m, 450-1150°C NADCAP rated heat treatment for aerospace applications, control to within ± 5 °C |
| Quench Tanks | 2 water (fast quench), 1 oil (medium quench) Fan cooling beds for (slow quench) Refrigeration unit for grades which fully transform below ambient temp. |
HIREWORK BRIGHT CONVERSION
Bar Peeler
• Max feedstock: 325mm, length 2.2-13.0m
• Output: 69-312mm rounds
• Surface roughness: 6.3 Ra (microns) (smooth turn), 3.2 Ra (microns) (precision turn)
Lathe
• Feedstock: 140-450mm rounds, max length 10.0m
• Surface roughness: 10.0 Ra (microns)
| ULTRASONIC TESTING | |
|---|---|
| Manual Contact | EN4179/ASNT NDT Level III, Level II, Level II(special) and Level I personnel |
| Immersion | 4 x tanks covering size range 19-500mm dia, 1-11m length 1, 2 or a 3 channel test, twin shear wave capable, Class AA & AAA (0.8mm – 0.4mm FBH) |
| High Frequency (Lab) | 1 x tank covering size range , test sensitivity 0.15-4mm FBHE (10, 15 & 25mhz) |
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