Zhejiang Guanyu Stainless Steel Tube Co., Ltd  
  Directory | Useful Tool | Sitemap | Contact US | Home

         

Cutting

Shearing of Stainless Steel






Conventional press/guillotine equipment is used for shearing stainless steel, but should normally be down-rated by 40% compared with their carbon steel rating. Blades and cutters should be well adjusted with edges maintained sharp, thus avoiding the dragging of metal over the blade which would lead to work hardening. The same considerations should apply in working the nibbler to cut out shapes in sheet metal. Stainless steel have greater strengths than low carbon (mild) steels.

Further the tendency of the Austenitic grades to work harden has a significant effect on the shearing of these steels.

More power is therefore required, and it is necessary to derate the shear (guillotines) against their nominal capacity, which is usually given in terms of the thickness of low carbon steel which they are capable of shearing.

Indicative relative derated capacities are as follows:

Low carbon (mild) steel 10mm thick material
Corrosion Resisting Steel (3CR12) 7mm thick material
Ferritic Stainless Steel (eg 430) 7/8mm thick material
Austenitic material (eg 304) 5/6mm thick material

Corrosion resisting (3CR12) and Ferritic Stainless Steel tend to fracture after being cut through approximately half their thickness. In this respect they are similar to carbon steel and low alloy steels.

Austenitic Stainless Steel are typified by a high ductility, and hence a greater resistance to fracture. A greater degree of penetration therefore takes place before fracture occurs. The clearance setting of the blades is therefore important. For shearing thin gauge sheet a clearance of 0.025 to 0.050mm is suggested.

Closer clearance tends to induce blade wear, whereas larger clearances allow the material being sheared to drag over to an excessive degree, resulting in excessive wear of the blades and a poor cut.

As the material thickness increases the clearance should be increased accordingly and adjusted to best suit the specific piece of equipment being used, consistent with minimum roll over, burr height and distortion (camber, twist and bow).

The nominal suggested clearances for such thicker material are:

3CR12 Corrosion resisting steel 2.5% of material thickness

Ferritic/Austenitic Stainless Steel 3 - 5% of material thickness

To counteract the greater shearing force required, the hold down pressure on the clamps may have to be increased, particularly when shearing the Austenitic grades.

The higher power requirements can to some extent be countered by altering the rake/shear angle. A rake of 1 in 40 is a shear angle of approximately 1½ °. This is the suggested least rake which should be used. Small rake/shear angles necessitate higher power/force, but cause less distortion, whereas larger rakes/shear angles (eg 1 in 16 or 3½ °) reduce the power/force required, but need higher hold down pressure on the clamps and tend to increase distortion.

Blades MUST BE SHARP. Blunt blades increase the roll over, burr height and distortion (camber, twist and bow).

The moving blade should be provided with as large as possible back clearance/rake angle, without causing chipping of this blade.

   Stainless Steel Tubing, Nickel Alloy Tubing, Brass Alloy Tubing, Copper Nickel Pipe Material Grades



Related References:
1. Cutting of Stainless Steel - Sawing | Hand Hacksawing | Shearing | Abrasive Cutting | Thermal Cutting
2. Cutting Tools of Stainless Steel
3. Cutting and Profiling Techniques for Stainless Steel
4. Laser Cutting Process
5. Laser Cutting of Stainless Steel
6. How to Cut Stainless Steel or Carbon Steel
7. How to Cutting Stainless Steel Sheets
8. How to Cut Stainless Steel Exhaust
9. Stainless Steel Cutting Ability

TubingChina.com All Rights Reserved

Directory | Standard | Heat | Heat Exchanger | Temperature | Pressure | Corrosion | Hardness | Surface | Properties | Select Stainless Steel | Contact US

Useful Tools:

Stainless Steel Weight Calculator
Metals Weight Calculator
Nickel Alloy Weight Calculator
Copper Brass Alloy Weight Calculator
Copper Brass Alloy Sheet Plate Weight Calculator
Sheet Plate Weight Calculator
Hardness Conversion Calculator
Hardness Conversion Chart
Rockwell Brinell Vickers Shore Hardness Conversion Chart
Conversion Calculator
Length Weight Temperature Volume Pressure Calculater
Pipe Working Pressure Calculator
Pressure Conversion Converter
Round Bar Size Calculator
Gauge Sizes
Sheet Metal Gauge
Pipe Schedule
Nominal Pipe Size
ANSI Pipe Chart
Inch to mm Chart
Stainless Steel Pipe Sizes
Stainless Steel Tubing Sizes Chart
Stainless Steel L H Grade
Stainless Steel Density
Conversion of Stainless Steel
Nickel Alloy Grades Comparison Material Grade Chart Carbon Steel
Structural Steel Comparison Chart



Main Products:

BA Tube | AP Tube
Condenser Tubes Tubing
Stainless Steel Reheater Tube Superheater Tubes
Stainless Steel U bend Tube
Nickel Alloy U bend Tubes
Copper Alloy U Bend Tubes
Heat Exchanger Tube
Super Duplex Pipe
Nickel Alloy Tube
Brass Alloy Tubing
Copper Nickel Alloys Tubes
Stainless Steel Hollow Tube
Stainless Steel Oval Tubing
Stainless Steel Square Tubing
Stainless Steel Rectangular Tubing
Stainless Steel Capillary Tube
Duplex Stainless Steel Pipe
Seamless Stainless Steel Tubing
Corrugated Stainless Steel Tubing
Stainless Steel Twisted Tube
Polishing Stainless Steel Tubing
Stainless Steel Aircraft Tube
Stainless Steel Hydraulic Tubing
Stainless Steel Instrumentation Tubing
Stainless Steel Angle Iron Bar
Stainless Steel Mechanical Tube
Bright Annealing Stainless Tube
Heat resistant Stainless Steel
Stainless Steel Welded Pipe
Extruded Serrated Finned Tubes Integral Finned Tubes / Extruded Aluminum Finned Tubes
Brass Alloys Copper Nickel Alloy Integral Low Finned Tubes
HFW High Frequency Welded Helical Spiral Serrated Finned Tubes
Corrosion Resistant Stainless Steel
Corrosion Resistance Stainless Steel

Stainless Steel Tubing Pipe

304 Stainless Steel Pipe
304L Stainless Steel Pipe
304H Stainless Steel Pipe
304/304L Stainless Steel Tubing
309S Stainless Steel Pipe
310S Stainless Steel Pipe
316L Stainless Steel Tubing
316Ti Stainless Steel Tube
317L Stainless Steel Pipe
321 321H Stainless Steel
347 347H Stainless Steel
904L N08094 Seamless Tubes
17-4 PH 630 UNS S17400 Stainless Steel
253MA S30815 Stainless Steel Tube
S31254 254 SMO Pipe
S31803 Stainless Steel
2205 Duplex Pipe Tubing
S32101 Stainless Steel
S32304 Stainless Steel
2507 Super Duplex Pipe
S32750 Super Duplex Pipe
S32760 Super Duplex Steel
1.4462 Stainless Steel Pipe
ASTM A213 | ASTM A269
ASTM A312 | ASTM A511
ASTM A789 | ASTM A790
ASTM B161 / ASME SB 161 | ASTM B111
EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes
Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
UNS N04400 Monel 400 Tubing
N06600 Inconel 600 Tube
N06601 Inconel 601 Tubing
N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
N08810 Incoloy 800H Tube
N08811 Incoloy 800HT Tubing
UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
ASTM B622 N06022 Hastelloy C-22 Alloy Tubes
C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
C68700 Brass Seamless Tubes
C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube