WELDING OF SS 310 MATERIAL CRACK ISUUE..

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Repute Steel & Engineering Co.

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Apr 18, 2025, 7:04:31 AM4/18/25
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We are doing a welding of SS 310 Material Plate with ER310 Grade welding electrode... But its contineous cracking.... at welding line,,,,...? Kindly Guide if any one..

IS ANY ALTERNATE WELDING MATERIAL CAN BE USED...?
IS ANY SPECIAL PROCEDURE TO WELD THIS MATERIAL...?

PRAVIN
REPUTE STEEL & ENGG CO

patni engineers

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Apr 18, 2025, 7:20:22 AM4/18/25
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Welding of SS310  is critical . You need to control Many Parameters.
What is Job thickness and  type of Joints.
Chandrakant

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Repute Steel & Engineering Co.

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Apr 18, 2025, 8:30:13 AM4/18/25
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Thickness is 22 mm for Pipe rolled fom plate and welding... 



​Warm Regards,
Pravin Mali
REPUTE STEEL & ENGINEERING CO.
global...@gmail.com; reput...@gmail.com
+91 9819742205  |   +91 8850830307  |   02266595628 
MUMBAI | INDIA

sridhar cn

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Apr 18, 2025, 1:22:39 PM4/18/25
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Dear Mr. Praveen, 

Try with following guidelines if possible.

1.Control heat input (1 to 1.5 kJ/mm) and interpass temperature (100–150°C).

2.Consider using ER309L or ER310L filler metals instead of ER310.

3. Use TIG or pulsed MIG welding with proper technique.

4. Ensure clean base metal and proper joint design to reduce restraint.

5. Use Stringer beads over weaving to reduce heat input and distortion.

6. If cracking persists, use nickel-based fillers (Inconel 600, 625) for high-temperature service.


Hope above info. will help to get defect free welds.


C Sridhar.

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Vishwas Keskar

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Apr 19, 2025, 12:21:36 AM4/19/25
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Which brand filler wire you are using ?
Vishwas 
IWE 
Sent from my iPhone

On 18 Apr 2025, at 10:52 PM, sridhar cn <sridha...@gmail.com> wrote:



james gerald

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Apr 19, 2025, 12:49:15 AM4/19/25
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In addition to cn Sridhar sir's recommendation following points to be considered.

ER310Mo produces a Nil Delta Ferrite weld since it is used at High Temperatures and prone to Hot Cracking.

Please share the photograph of the crack with location to determine the type of crack such as Hot cracking, IGC (intergranular corrosion) etc..

Solidification cracking (hot cracking) is also known as centerline cracking as it occurs in the weld centerline. Can be prevented by below methods.

1. Normally in Austenitic stainless steel a Delta ferrite content of 3-8% is recommended to prevent Hot cracking but ER310Mo is a Nil deltaferrite weld and prone to Hot cracking.
2. Reducing the impurity contents in the electrode such as sulphur and phosporous to a very low level.
3. Restricting the Interpass temperature to a maximum of 100degC as it will enhance fast cooling and reduce the time spent between the liquidus and solidus curve during the final stages of solidication.
4. The same effect is attained by restricting  the Heat Input to a reasonable level.
5. By maintaining proper weld bead width to depth ratio, Normally a ratio of 1:1 is recommended and maximum recommended is 2:1 and beyond which Hot cracking will occur.



Please share a photograph of the crack to understand its nature.


Thanks & Regards

J.Gerald Jayakumar

0091-8838619635



james gerald

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Apr 19, 2025, 2:52:42 AM4/19/25
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one more point to add.

Check welding consumable manufacturer's supplying ER 310Mo with Manganese on higher range

Thanks & Regards

J.Gerald Jayakumar

0091-8838619635

Pratik gandhi

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Apr 19, 2025, 8:08:27 AM4/19/25
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I also faced the same, it was centerline cracks in Single bevel joints :

Primary reason is Zero delta ferrite for these welds.

Suggest the following measures to avoid cracking:
- Low Heat input with Low Interpass
- Increased Mn content in the filler on the higher side
- Use of SMAW lowers the risk of Cracking than GTAW if 310 filler is mentioned in the specifications 
- Use of 309 fillers.

Hope, this will resolve your cracking problem.

Regards,
Pratik U. Gandhi

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Kannayeram Gnanapandithan

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Apr 19, 2025, 8:13:19 AM4/19/25
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It is fissuring due to fully Austenitic structure and delta Ferrite is less than 5. Control the heat input by using minimum bearable amps. Use DM water on weld behind the weldmetal to make cool fast. Otherwise, if project permitted, u can use 309 to avoid fissure 

THANKS & BEST REGARDS,
KG.PANDITHAN, BE, IWE,  CSWIP 3.1,
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LA ISO 9001-2015, ISO 3834, EN 15085, 
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