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2.5  Welding wire selection

The following table includes the recommended welding consumable for the most commonly 

welded materials.

Base material

BOC Consumable

C-Mn and low carbon steels

BOC Mild steel TIG wire

Low Alloy steels
  1.25Cr/0.5Mo

Comweld CrMo1

  2.5Cr/1Mo

Comweld CrMo2

Stainless Steel
  304/304L

Profill 308

  316/316L

Profill 316

  309/309-C-Mn

Profill 309

  321/Stabilised grades

Profill 347

Filler rod diameter (mm)

Thickness of metal (mm)

2

0.5 – 2

3

2 – 5

4

5 – 8

4 or 5

8 – 12

5 or 6

12 or more

 

2.6  Tungsten electrode selection 

Base 

metal 

type

Thickness 

range

Desired 

results

Welding 

current

Electrode 

type

Shielding 

gas

Tungsten performance 

characteristics

Copper al

lo

ys

, C

u-NI al

lo

ys and 

Nick

el

 al

lo

ys

All

General 

purpose

DCSP

2% 

Thoriated 

(EW-Th2)

75% Argon/ 

25% Helium

Best stability at medium 

currents. Good arc starts  

Medium tendency to spit

Medium erosion rate

2% Ceriated 

(EW-Ce2)

75% Argon/ 

25% Helium

Low erosion rate. Wide current 

range. AC or DC. No spitting. 

Consistent arc starts 

Good stability

Only thick 

sections

Increase 

penetration 

or travel 

speed

DCSP

2% Ceriated 

(EW-Ce2)

75% Argon/ 

25% Helium

Low erosion rate. Wide current 

range. AC or DC. No spitting. 

Consistent arc starts

Good stability

Mild S

teels

, Carbon S

teels

,  Al

lo

y S

teels

, 

Stainle

ss

 S

teels and Titanium al

lo

ys

All

General 

purpose

DCSP

2% 

Thoriated 

(EW-Th2)

75% Argon/ 

25% Helium

Best stability at medium 

currents. Good arc starts 

Medium tendency to spit

Medium erosion rate

2% Ceriated 

(EW-Ce2)

75% Argon/ 

25% Helium

Low erosion rate. Wide current 

range.  AC or DC. No spitting 

Consistent arc starts

Good stability

2% 

Lanthanated 

(EWG-La2)

75% Argon/ 

25% Helium

Lowest erosion rate. Widest 

current range on DC. No spitting. 

Best DC arc starts and stability

Only thick 

sections

Increase 

penetration 

or travel 

speed

DCSP

2% Ceriated 

(EW-Ce2)

75% Argon/ 

25% Helium

Low erosion rate. Wide current 

range. No spitting. Consistent arc 

starts. Good stability

2% 

Lanthanated 

(EWG-La2)

Helium

Lowest erosion rate. Highest 

current range. No spitting. Best 

DC arc starts and stability

BOC Smootharc TIG 185 Operating Manual

10

11

BOC Smootharc TIG 185 Operating Manual

Содержание Smootharc TIG 185 DC

Страница 1: ...Smootharc TIG 185 DC Operating manual...

Страница 2: ...on This document does not take into account the particular circumstances of the recipient and the recipient should not rely on this document in making any decisions including but not limited to busine...

Страница 3: ...issue to BOC and arrange for the cylinder to be returned to BOC 1 1 Health hazard information The actual process of welding is one that can cause a variety of hazards All appropriate safety equipment...

Страница 4: ...ctrical shock Never touch live electrical parts Always repair or replace worn or damaged parts Disconnect power source before performing any maintenance or service Earth all work materials Never work...

Страница 5: ...tense heat on the base metal is produced The base metal melts very quickly Ions from the inert gas are directed towards the negative electrode at a relatively slow rate Direct current with straight po...

Страница 6: ...or DC No spitting Consistent arc starts Good stability Only thick sections Increase penetration or travel speed DCSP 2 Ceriated EW Ce2 75 Argon 25 Helium Low erosion rate Wide current range AC or DC...

Страница 7: ...e a truncated point with a flat spot Diameter of flat spot determines amperage capacity See below The included angle determines weld bead shape and size Generally as the included angle increases penet...

Страница 8: ...0 50 2 3 5 1 3 20 10 60 2 3 5 5 16 10 2 8 40 1 5 3 50 50 15 40 3 20 6 3 15 r s 2 s 2 3 0 S 2 3 0 3 4 12 2 1 1 5 3 6 20 50 2 3 5 1 3 20 10 60 2 3 5 5 16 10 2 8 40 1 5 3 50 50 15 40 3 20 6 3 15 r s 2 s...

Страница 9: ...int type Number of passes Tungsten electrode size mm Consumable size mm Current A Welding travel speed cm min Gasflow l min 0 8 Fillet 1 1 6 1 5 70 30 5 1 0 Fillet 1 1 6 1 5 90 30 5 1 5 Fillet 1 1 6 2...

Страница 10: ...empted and those containing lead are virtually unweldable Plate thickness mm Joint type Root gap mm Layers Tungsten size mm Consum able size mm Current A Welding speed cm min Gasflow l min 1 5 Square...

Страница 11: ...G Pack or a BOC 26F FX TIG torch fitted with a separate contactor The BOC AC DC TIG pack torch is fitted to the machine by means of the Safe Lock dinse back end For DC TIG operation fit the torch back...

Страница 12: ...the TIG torch to the positive dinse plug connector and the work return lead to the negative dinse plug connector In this mode most of the heat is generated within the non consumable tungsten and the h...

Страница 13: ...l in oven prior to welding Filler material is oily or dusty Replace filler metal Alloy impurities in the base metal such as sulphur phosphorous lead and zinc Change to a different alloy composition wh...

Страница 14: ...rchase An authorised BOC Service Agent must carry out warranty repairs Freight packaging and insurance costs are to be paid for by the claimant No additional express warranty is given unless in writin...

Страница 15: ...ustomer Service Centre on Australia 131 262 Email contact boc com www boc com au BOC Limited ABN 95 000 029 729 Riverside Corporate Park 10 Julius Avenue North Ryde NSW 2113 Australia New Zealand 0800...

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