Used Arburg 270S 250-60 U for sale (65,226)

Condition: used, Year of construction: 1994, functionality: fully functional, machine/vehicle number: 161729, clamping force: 1,000 kN, screw diameter: 40 mm, injection weight: 158 g, ejector force: 40,000 N, total length: 4,225 mm, total width: 1,370 mm, total height: 1,200 mm, overall weight: 3,080 kg, heating capacity: 5.5 kW (7.48 HP), pump power: 18,500 W, power: 24.3 kW (33.04 HP), type of input current: three-phase, input frequency: 50 Hz, input voltage: 380 V, input current: 96 A, Equipment: documentation/manual, We are offering this used Arburg 370M 1000-250 injection moulding machine, year of manufacture 1994. Itsdoyrczgopfx Ag Aon Serial number: 161729 Year: 1994 Operating voltage: 380 V 3~ 50 Hz Control voltage (230 V): 220 V ~ 50 Hz Control circuit voltage: 24 V = Total rated current: 96.00 A Total connected load: 55.0 kW Drive upgraded to xD card! If you have any questions or require further information, please feel free to send us a message or give us a call.

Condition: used, Year of construction: 2018, Machine no. 6, serial no. 245127, control system, manufacturer Arburg Selogica, clamping force 500 kN, screw diameter 20 mm, handling system, manufacturer TecnoMatic, type micro cnc, on-machine dryer, manufacturer Piovan, type DPA20, conveying device, serial no. 5012216, year of manufacture 2017. Itjdsz Hl Hdjpfx Ag Ajn

Condition: used, Injection molding machine ARBURG, type Allrounder 221 M 350-75 Serial No. 163646, Year of manufacture 1995 Clamping force 35 tons (350 kN) Screw diameter, presumably Ø 25 mm Platen size 342 x 250 mm Mold size, max. 221 mm Mold mounting height 150 to 300 mm Column spacing 221 mm (center distance) Opening stroke - platen stroke, max. 200 mm Ejector stroke 60 mm Ejector force 27 kN Hydraulic oil tank capacity 120 liters (delivery without oil) Heating capacity 4 kW Motor power, hydraulic pump 7.5 kW Power supply 400 volts, 50 Hz, 12 kW - ARBURG MULTRONICA control system with foil keyboard and screen - Stainless steel granulate hopper, 50 liters, on the injection unit - Adjacent control cabinet Space requirement without transport pallet, L x W x H 2750 x 1350 x 1850 mm Iodpfx Ajzx Etwjg Ajtn Transport dimensions on pallet, L x W x H 2750 x 1700 x 1900 mm Weight approx. 1300 kg Good condition

Year of construction: 2011, condition: used, Rated current: 95A, connected load: 53kW, an on-site inspection is possible. Iedpfx Agez S Ivaj Astn

Condition: excellent (used), Year of construction: 2009, Arburg 370 S 600-290 (2009) Screw ø 35 mm CLAMPING UNIT Clamping force: 600 kN Closing force: 38 kN Opening force / increased: 24 / 160 kN Opening stroke: 400 mm Itodpozrv Dtofx Ag Asn Mould height min.: 200 mm Daylight max.: 600 mm Distance between tie bars: 370 × 370 mm Platen size: 510 × 510 mm Weight of mov. mould half: 360 kg Ejector force: 125 kN Ejector stroke: 125 mm HYDRAULICS Drive power: 15 kW Total connected load: 23,9 kW 💉 INJECTION UNIT — ø 35 mm Screw stroke max.: 150 mm Effective screw length L/D: 20 Injection volume max.: 132 cm³ Shot weight max.: 20,5 g PS Material throughput max.: 10,5 kg/h PS Injection pressure max.: 2000 bar Injection flow max.: 140 cm³/s Injection flow with accumulator: 430 cm³/s Back pressure max.: 350 / 200 bar Screw speed max.: 54 m/min Screw torque max.: 380 Nm Nozzle contact force: 60 kN Nozzle retraction stroke: 240 mm Heating zones / power: 4 zóny / 5,8 kW Nozzle heating: 0,6 kW Hopper capacity: 50 l DIMENSIONS & WEIGHT Oil capacity: 135 l Net weight: 3300 kg Electrical connection: 80 A

Condition: excellent (used), Year of construction: 2009, Arburg 370 S 600-290 (2009) Screw ø 35 mm 📐 CLAMPING UNIT Clamping force: 600 kN Closing force: 38 kN Opening force / increased: 24 / 160 kN Opening stroke: 400 mm Mould height min.: 200 mm Daylight max.: 600 mm Distance between tie bars: 370 × 370 mm Platen size: 510 × 510 mm Weight of mov. mould half: 360 kg Iodpfx Agozrv Eqs Aetn Ejector force: 125 kN Ejector stroke: 125 mm ⚙️ HYDRAULICS Drive power: 15 kW Total connected load: 23,9 kW 💉 INJECTION UNIT — ø 35 mm Screw stroke max.: 150 mm Effective screw length L/D: 20 Injection volume max.: 132 cm³ Shot weight max.: 20,5 g PS Material throughput max.: 10,5 kg/h PS Injection pressure max.: 2000 bar Injection flow max.: 140 cm³/s Injection flow with accumulator: 430 cm³/s Back pressure max.: 350 / 200 bar Screw speed max.: 54 m/min Screw torque max.: 380 Nm Nozzle contact force: 60 kN Nozzle retraction stroke: 240 mm Heating zones / power: 4 zóny / 5,8 kW Nozzle heating: 0,6 kW Hopper capacity: 50 l 📦 DIMENSIONS & WEIGHT Oil capacity: 135 l Net weight: 3300 kg Electrical connection: 80 A

Condition: excellent (used), Year of construction: 1998, functionality: fully functional, clamping force: 500 kN, mold height (min.): 225 mm, ejector force: 300 N, overall weight: 2,450 kg, input voltage: 380 V, Equipment: documentation/manual, ARBURG 320 S in excellent condition, low operating hours, and with a Piovan dryer. Year of manufacture: 1998. Piovan dryer, model TDM604. Year of manufacture: 2005. Includes documentation. Isdpfxezxg Amo Ag Aetn The machine is powered on for inspection.

Condition: good (used), Technical data for the shelf connector: Shelf system: Stow Type: Pal Rack NS Included in delivery are: 01x shelf connector, used for shelf distance: 250 mm total length: 250 mm cross section: U 35x25 mm material thickness: approx. 2,00 mm material color: sendzimir galvanized Drill hole diameter: 11 mm Weight: 0,330 kg | pcs. 02x screws M10 x 35 mm 02x nuts M10 General information about the article: Itsdomqk Svjpfx Ag Ajn This article is only offered for pickup. A desired transport or shipment of this article is associated with additional costs, which can be requested separately depending on the delivery location or scope of delivery with us.

Condition: good (used), Year of construction: 2013, operating hours: 22,420 h, functionality: fully functional, clamping force: 1,000 kN, screw diameter: 30 mm, displacement volume: 85 cm³, total length: 4,200 mm, total width: 2,100 mm, total height: 3,600 mm, overall weight: 7,300 kg, Equipment: documentation/manual, ARBURG Allrounder 1200 T 1000-170 Stock No.: 503459 Manufacturer: ARBURG Type: Allrounder 1200 T 1000-170 Control System: Selogica Year of Manufacture: 2013 Operating Hours: 22420 h Itjdpfx Ajz A Dmzeg Aon Technical Data - Clamping Unit Clamping Force: 1000 kN Minimum Mold Height: 400 mm Maximum Mold Distance: 700 mm Opening Stroke: 300 mm Platen Size (Diameter): 1200 mm Ejector Stroke: 175 mm Ejector Force: 25 kN Centering of Moving Platen (Diameter): 125 mm Centering of Fixed Platen (Diameter): 125 mm Mold Weight: 1150 kg Technical Data - Injection Unit Screw Diameter: 30 mm Injection Volume: 85 cc Injection Pressure: 2000 bar Screw Length: 20 l/d Screw Stroke: 120 mm Number of Heating Zones: 4 Nozzle Distance: 210 mm Dimensions & Weight Machine Dimensions (L x W x H): 4.2 m x 2.1 m x 3.60 m Total Weight: 7300 kg Equipment 3x Temperature Control Units for Hot Runner Screen Text: German CEE Socket 16A Compact-Flash Drive Rotary Table Freely programmable inputs (2) and outputs (2) Machine with Material Hopper Machine with Water Manifold Needle Gate Nozzle, Hydraulically Actuated EUROMAP 67 Handling Interface Servo-Controlled Hydraulic Pumps Wear-Resistant Plasticizing Unit

Condition: like new (used), Year of construction: 2009, functionality: fully functional, We are selling this grinding machine, which is connected and available for testing. Machine parameters: - Grinding of rotational parts clamped between centers with an accuracy of 0.001 mm - Max. swing diameter: 0–1,450 mm - Max. turning length: 6,000 mm - Max. workpiece weight: 20,000 kg (25,000 kg with steady rests) Iodpfx Aoxxrzzjg Astn - Grinding wheel diameter: 915 mm - Wheel width: 100 mm - Non-contact measurement of dimensions, tolerances, and workpiece geometry, including printout of measurement protocol - 100% ultrasonic measurement possible - CNC control with capability for profile grinding (taper, concave and convex, CVC) - Grinding of ceramic and metallic coatings using diamond and ceramic grinding wheels The machine is currently completing an order.

Condition: excellent (used), Year of construction: 2017, functionality: fully functional, clamping force: 1,100 kN, screw diameter: 35 mm, clearance between the columns: 470 mm, displacement volume: 144 cm³, injection pressure: 2,000 bar, injection weight: 132 g, mold height (min.): 350 mm, ejector stroke: 150 mm, Clamping force: 110t Year of manufacture: 2017 Injection shot weight: 132g Injection unit 290 + 100 (2K) Screw diameter: 35 mm Specific injection pressure: 2000 bar Injection volume: 144 ccm Injection shot weight: 132 g Mold clamping unit 1100 Clamping force: 110 t Distance between tie bars: 470 x 470 mm Mold height: 350 mm Opening stroke: 450 mm Ejector stroke: 150 mm Control: Selogica direct Two-component injection molding machine with a KUKA robot Ijdpfx Agez Ef N Ae Astn Equipment: - Only ABS and PP were processed - 2nd injection unit EUROMAP 100 vertical (injection into the parting line) - Selogica direct control with a 15" touchscreen - Hydraulics with accumulator (100 l pressure accumulator), injection during mold closing - Control of a hydraulic rotary unit + 3 core pulls - Hydraulic ejector, blow unit - 6 heating circuits for the mold/hot runner - 6-circuit water distribution manifold for cooling - Min. mold height 350 mm, tie bar extension 100 mm, machine raised by 100 mm - KUKA KR6 robot (operated via Selogica) with enclosure

Condition: excellent (used), Year of construction: 2012, Arburg 520S 1600-400/170 e² / Production line with Geiger robot Year of manufacture: 2012 Injection unit: Screw diameter: 35 mm Shot weight: 141 g Injection pressure: 2500 bar Dosage volume: 154 ccm Clamping unit: Clamping force: 160 t Tie bar spacing: 520 x 520 mm Platen size: 695 x 695 mm Ejector: hydraulic Clamping unit: hydraulic Control system: SELOGICA - touchscreen Additional equipment: 2K injection molding machine with rotary table and Geiger robot Very good technical condition Hybrid machine: energy-saving and very quiet Itodpfx Ajz Ip Tdeg Ajn Euromap 67 Robot interface Air valve x 4 Hydraulic core pull x 5 Control system with 12 hot runner zones Reinforced injection units – bimetallic Machine with two cylinders / batteries with compressed nitrogen (additional charge for fast operation) The machine features a built-in servomotor in the injection unit responsible for dosing the plastic Parallel movements Screw diameter in the vertical injection unit: ⌀30 mm - 77 g/PS Integrated Arburg brand conveyor belt and sorting flap Original Weber brand rotary table, highly precise – electrically driven (integrated inverter in the machine) Rotary table and robot available as an additional purchase Dimensions: Weight: 8140 kg Length/Width/Height: 4.81 x 1.84 x 3.45 m All offered machines are started up by our service technicians prior to sale. A video of the technical tests for the selected machine can be provided, or you can participate in live technical tests at our facilities in Łódź. Price: On request

Condition: excellent (used), Year of construction: 2009, ARBURG 370 S — 600-290 Screw ø 35 mm 📐 CLAMPING UNIT Clamping force: 600 kN Closing force: 38 kN Opening force / increased: 24 / 160 kN Opening stroke: 400 mm Mould height min.: 200 mm Daylight max.: 600 mm Distance between tie bars: 370 × 370 mm Platen size: 510 × 510 mm Weight of mov. mould half: 360 kg Ejector force: 125 kN Ejector stroke: 125 mm ⚙️ HYDRAULICS Drive power: 15 kW Total connected load: 23,9 kW 💉 INJECTION UNIT — ø 35 mm Screw stroke max.: 150 mm Effective screw length L/D: 20 Injection volume max.: 132 cm³ Shot weight max.: 20,5 g PS Material throughput max.: 10,5 kg/h PS Injection pressure max.: 2000 bar Itjdszrv N Nepfx Ag Asn Injection flow max.: 140 cm³/s Injection flow with accumulator: 430 cm³/s Back pressure max.: 350 / 200 bar Screw speed max.: 54 m/min Screw torque max.: 380 Nm Nozzle contact force: 60 kN Nozzle retraction stroke: 240 mm Heating zones / power: 4 zóny / 5,8 kW Nozzle heating: 0,6 kW Hopper capacity: 50 l 📦 DIMENSIONS & WEIGHT Oil capacity: 135 l Net weight: 3300 kg Electrical connection: 80 A

Condition: excellent (used), Year of construction: 2009, ARBURG 370 S — 600-290 Screw ø 35 mm 📐 CLAMPING UNIT Clamping force: 600 kN Closing force: 38 kN Opening force / increased: 24 / 160 kN Opening stroke: 400 mm Mould height min.: 200 mm Daylight max.: 600 mm Distance between tie bars: 370 × 370 mm Platen size: 510 × 510 mm Weight of mov. mould half: 360 kg Ejector force: 125 kN Ejector stroke: 125 mm ⚙️ HYDRAULICS Drive power: 15 kW Total connected load: 23,9 kW 💉 INJECTION UNIT — ø 35 mm Screw stroke max.: 150 mm Effective screw length L/D: 20 Injection volume max.: 132 cm³ Shot weight max.: 20,5 g PS Material throughput max.: 10,5 kg/h PS Injection pressure max.: 2000 bar Injection flow max.: 140 cm³/s Injection flow with accumulator: 430 cm³/s Itedozrv Tzspfx Ag Aon Back pressure max.: 350 / 200 bar Screw speed max.: 54 m/min Screw torque max.: 380 Nm Nozzle contact force: 60 kN Nozzle retraction stroke: 240 mm Heating zones / power: 4 zóny / 5,8 kW Nozzle heating: 0,6 kW Hopper capacity: 50 l 📦 DIMENSIONS & WEIGHT Oil capacity: 135 l Net weight: 3300 kg Electrical connection: 80 A

Condition: ready for operation (used), Year of construction: 2024, operating hours: 766 h, clamping force: 400 kN, screw diameter: 18 mm, Hydraulic injection moulding machine manufactured in 2024. This Arburg Allrounder 270 C 400-70 features a clamping force of 400 kN and a maximum specific injection pressure of 2738 bar. It includes a mould height range of 160 - 475 mm and a distance between tie bars of 280 x 280 mm. If you are looking to get high-quality injection moulding capabilities, consider the Arburg Allrounder 270 C 400-70 machine we have for sale. Contact us for further details. Itjdpfx Ajz Eq S Nsg Aen - Max. Specific Injection Pressure: 2738 bar- Max. Swept Volume: 28 cm³- Mould Height: 160 - 475 mm- Distance Between Tie Bars: 280 x 280 mm- Centering Diameter (Ejector/Nozzle): 110 mm / 125 mm- Operating Hours (Pump): 766 hrs- Core Pull: 1- Heating Control Circuits: 3 electrical heating control circuits for mould heating, max. 2 kW/230 V- Cooling Circuits: Programmable machine-related cooling circuits, cooling water distribution with 3 free circuits (DN 13)- Nozzle Specifications: Open nozzle 18 mm with M 24x1.5 internal thread, flat nozzle tip, nozzle heating band- Control System: SELOGICA direct control with 15-inch (38.1 cm) touchscreen user interface- Connectivity & Interfaces: Basic Connectivity (CPU Ethernet port, IIoT Gateway), EUROMAP 67 robot interface (50-pin), EUROMAP 65 chip card operating authorization, CompactFlash & USB interface, Printer interface (serial USB), Interface for colouring/dosing unit

Condition: used, Year of construction: 1998, Serial No. 174520, control unit, manufacturer Arburg, closing force 400 kN, screw diameter 20 mm, sprue picker, manufacturer TecnoMatic, type micro cnc, vacuum separator, manufacturer Piovan, type DPA20, year of manufacture 2016, microprocessor control, 2 temperature control units, internal numbers 14 and 19, F, drying cylinder, desiccant dryer, manufacturer Piovan. Isdez Hl H Ropfx Ag Aotn

Condition: good (used), Year of construction: 1994, Ref. no.: 17540 Manufacturer: ARBURG Type: 270 C 500-100 RUNHOUR Only 100 Year of construction: 1994 Itsdpfsyiz U Tjx Ag Ajn Clamping unit Clamping force: 50 ton Opening stroke: 350 mm Distance between tie bars: 270 X 270 mm Mould height min.: 200 mm Platen size (h x v): 405 X405 mm Injection unit Screw diameter: 25 mm Injection volume: 67 cm³ Shot weight: 61 g Injection pressure: 2500 bar Measurements and weight Dimensions: 3,3 X 1,5 X 2,0 m Machine weight: 2400 kg Further information: Laboratory Machine with Exceptionally Low Operating Hours The offered ARBURG 270 C 500-100 was manufactured in 1994 and originates from the training and laboratory department of a university. The machine was not used in regular production and was mainly operated for educational and testing purposes. The control system shows only approximately 100 operating hours and just 867 machine cycles. The machine is equipped with a hydraulic drive system and the proven ARBURG Dialogica control unit. In addition, it features an integrated crane system to facilitate mould and component changes. The scope of supply also includes an unused spare screw with a diameter of 15 mm and a complete additional plasticizing unit, providing extra flexibility for different applications. Due to its exceptionally low usage, documented history, and valuable additional equipment, this machine represents a rare opportunity on the used machinery market.

Condition: excellent (used), Year of construction: 1999, BATTENFELD PE/PP PIPE HEAD PO 250 / 600 SI Type: PO 250/600 SI. Screen basket Isdjvy It Topfx Ag Aetn Year of manufacture: 1999 Little used Condition: Very good, needs cleaning With co-extruder Extrudex EN 25, year of manufacture 1999 For color strips The system is my property Location: Sachal Extrusionsmaschinen Bahnhofstr 6 D-26345 Bockhorn-Grabstede

Condition: excellent (used), Year of construction: 2018, HS Flex 20 station pallet loader. XYZ: 600 x 550 x 330mm, Itedpfxszghnge Ag Aen Maximum workpiece diameter 450mm, maximum workpiece height 355mm, Maximum table load 300Kg, A axis -/+ 115 degrees, spindle taper HSK 63, spindle speed 15,000rpm, 30 station tool changer, Heidenhain TNC 640 control, with swarf conveyor , and high pressure coolant.

Condition: excellent (used), Year of construction: 2001, machine/vehicle number: 184686, clamping force: 1,000 kN, screw diameter: 25 mm, clearance between the columns: 420 mm, displacement volume: 54 cm³, injection weight: 45 g, opening stroke: 500 mm, For sale is an Arburg injection moulding machine, model 420 C 1000-150/60. The machine is in excellent technical condition and has been very well maintained. Technical data: Year of manufacture: 2001 Ijdpfx Agex Itamo Aetn Clamping force: 1000 kN Tie bar spacing: 420 x 420 mm Opening stroke: 500 mm Mould installation height: 250 mm Mould mounting plate: 570 x 570 mm Ejector stroke: 175 mm Screw diameter: 25 mm Calculated shot volume: 54 cm³ Shot weight: 45 g/PS The machine is offered without periphery. Rotary table, material conveying systems, temperature control units and other accessories are not included.

Condition: excellent (used), Year of construction: 2012, functionality: fully functional, clamping force: 1,500 kN, screw diameter: 50 mm, clearance between the columns: 520 mm, displacement volume: 392 cm³, injection pressure: 2,000 bar, injection weight: 359 g, mold height (min.): 250 mm, plate length: 695 mm, plate width: 695 mm, total length: 5,205 mm, total width: 1,670 mm, total height: 2,200 mm, overall weight: 6,500 kg, Clamping force: 150 t Year of manufacture: 2012 Injection shot weight: 359 g Injection unit 800 Screw diameter: 50 mm Specific injection pressure: 2000 bar Injection volume: 392 cm³ Injection shot weight: 359 g Screw L/D ratio: 24 Tool closing unit 1500 Clamping force: 150 t Tool plate dimensions: 695 x 695 mm Distance between columns: 520 x 520 mm Tool height: 250...650 mm Opening stroke: 400 mm Maximum plate distance: 650...1050 mm Weight: 6500 kg Dimensions (m) L x W x H: 5.25 x 1.67 x 2.20 m Control system: Selogica Equipment: Hydraulic core 12-zone hot runner system Accumulator Frequency converter Hidrive drive Itjdpfoz Iz Exex Ag Ajn 4 x pneumatic valve

Condition: ready for operation (used), Year of construction: 2019, operating hours: 300 h, clamping force: 400 kN, overall weight: 2,180 kg, controller manufacturer: ARBURG, controller model: SELOGICA direct, Hydraulic injection moulding machine manufactured in 2019. This Arburg ALLROUNDER 270 C 400-100 features a clamping force of 400 kN and an opening stroke of 350 mm. It has a maximum injection pressure of 2500 bar and a shot weight of up to 29 g. If you are looking to get high-quality injection moulding capabilities, consider the Arburg ALLROUNDER 270 C 400-100 machine we have for sale. Contact us for further details. Itsdpfszvm Azox Ag Asn - Control System: SELOGICA direct- Clamping Force: 400 kN- Opening Force: 130 kN- Opening Stroke: max. 350 mm- Mold Mounting Height (min.): 200 mm- Platen Distance (max.): 550 mm- Distance Between Tie-Bars (H x V): 270 x 270 mm- Size of Mold Platens (H x V): max. 446 x 446 mm- Weight of Movable Mold Half: max. 180 kg- Ejector Force / Stroke: max. 30 kN / 125 mm- Dry Cycle Time (EUROMAP): 1.2 - 189 s-mm- Injection Unit Size: 100- Screw Diameter: 20 mm- Effective Screw Length (L/D): 25- Screw Stroke: max. 100 mm- Calculated Stroke Volume: max. 31 cm³- Shot Weight (PS): max. 29 g- Material Throughput (PS / PA6.6): max. 5.5 kg/h / 2.8 kg/h- Max. Injection Pressure: 2500 bar- Max. Holding Pressure: 2500 bar- Max. Injection Rate: 64 cm³/s- Max. Screw Torque: 120 Nm- Nozzle Contact Force / Retraction Stroke: max. 50 kN / 180 mm- Heating Capacity: 4.95 kW- Hopper Capacity: 1.8 L- Operating Voltage: 400 V 3~ 50 Hz- Control Voltage: 230 V ~ 50 Hz / 24 V DC- Motor / Heating Rated Current: 42 A / 11 A- Total Rated Current: 53 A- Total Connected Load: 29 kW- Pump Motor Power: 11 kW- Hydraulic Oil Capacity: 165 L- Net Machine Weight: 2,180 kg

Condition: good (used), Year of construction: 2000, Arburg 420 C 1000-250 (2000) Clamping force : 100 t Screw diameter : 30 mm Distance between tie bars : 420 x 420 Itjdpfexqcrzex Ag Ajn Shot weight : 100 g Max mold hight : 200 m Max opening : 730 g \+ robot TECHNOMATIC

Year of construction: 1986, condition: used, Clamping force: 750kN, heating power: 5.56kW, connected load: 20.6kW, weight: 2.4t, an on-site inspection is possible. Itodpfsz S Iu Nsx Ag Aon

Year of construction: 1985, condition: ready for operation (used), Voltage: 380V, current consumption: 125/118A, control system: Philips B2T 6, equipment: hydraulically actuated turret vorhanden, enclosed working area with slant bed geometry, hydraulic clamping system, piping, condition: fully functional, very good mechanical condition, visually well maintained, partially overhauled, tool turret: angular position encoder completely renewed, turret indexes absolutely faultlessly and precisely according to the data sheet, CNC control system: power supply professionally overhauled, main spindle drive: power section/drive completely overhauled, with power chuck and base jaws. An on-site inspection is possible. Iedpfsy U Nqnex Ag Astn