Applicability of NACE SP 0472-2010 for For SA 516-70 Material

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Jignesh Desai

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Sep 11, 2014, 3:58:36 AM9/11/14
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Please refer Clause 1.2 of NACE SP 0472-2010 which excludes steels with greater than 480 MPa (70,000 psi) minimum specified tensile strength.

 

I have below queries related to applicability of NACE SP 0472-For SA 516-70 Material.

 

1. As per ASME Sec IX, the minimum specified tensile strength of SA 516 Grade 70 is 70 Ksi (485 Mpa), which is higher than above NACE clause, Hence advise whether NACE SP 0472 is applicable to SA 516 Grade 70?

 

Would appreciate the expert opinion on with possible technical justification?

 

Regds/Jignesh

krishna mudhale

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Sep 11, 2014, 4:46:50 AM9/11/14
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Hi,
As per my knowledge and experience, usually SA 516 Gr 60 material only selected in NACE or Sour service. Because UTS of Gr 60 is lower. Hence Gr 70 is not recommended.
Thanks & Regards
Krishna Mudhale
Mob: +91-9860459776/ 8796076925

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pgoswami

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Sep 11, 2014, 8:21:49 AM9/11/14
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Clause 1.2 reads as below. Clause 2.1 illustrates how the hardness should be controlled. If everything could be put in place with a well engineered technical specification then there's no issue on using SA 516/70 steel for Sour Service applications.
 
Hope the answer clarifies the query.
 
Thanks.
 
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Specialist
Ontario, Canada
 
 

1.2 This standard covers only carbon steels classified as P-No. 1, Group 1 or 2. These classifications can be found

in the ASME Boiler and Pressure Vessel Code, Section IX

9 for pressure vessels, ASME/ANSI B31.3 for process

piping, or API Standards 620 and 650 for tanks. It excludes steels with greater than 480 MPa (70,000 psi) minimum

specified tensile strength. Other materials may be vulnerable to cracking, but these materials are outside the scope

of this standard.

 

2.1 This section contains guidelines for prevention of HSC in weldments. Paragraph 2.2 addresses control of weld

deposit hardness and Paragraph 2.3 addresses control of HAZ hardness.

2.2 Weld Deposit Hardness Control

2.2.1 The hardness of the completed weld deposit shall not exceed 200 HBW.

2.2.2 Filler metals for the following welding processes shall be certified in accordance with the listed

specifications from the ASME Boiler and Pressure Vessel Code, Section II, Part C

18 or from the American

Welding Society (AWS):

(5)

(a) SMAW: ASME SFA-5.1

 or AWS A5.1

(b) GTAW and GMAW: ASME SFA-5.18

or AWS A5.18

(c) FCAW: ASME SFA-5.20

 or AWS A5.20; and

(d) SAW: ASME SFA-5.17

or AWS A5.17.

2.2.3 Weld Deposit Hardness Testing Exemptions

2.2.3.1 Weld deposits produced using welding process and filler metal combinations listed in Table 2 do not require production hardness testing, unless otherwise specified by the user.

 
From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of krishna mudhale
Sent: Thursday, September 11, 2014 4:32 AM
To: material...@googlegroups.com
Subject: Re: [MW:21867] Applicability of NACE SP 0472-2010 for For SA 516-70 Material

Jignesh Desai

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Sep 16, 2014, 1:22:38 AM9/16/14
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Thanks for input,

I have requested to Nace.org for the clarification and received below reply for the subject query.

""""Hello, Jignesh

I received your email with your query regarding SP0472-2010, and the TG has informed me of the following:

The correct metric translation for this is 485 MPa which will include A516-70 grade steel. This will be corrected in next ballot.

Thank you for your query, and if you have any additional concerns, please feel free to contact me.""""""

Regds/Jignesh

Sent: Thursday, September 11, 2014 4:32 AM

Subject: Re: [MW:21867] Applicability of NACE SP 0472-2010 for For SA 516-70 Material

Hi,
As per my knowledge and experience, usually SA 516 Gr 60 material only selected in NACE or Sour service. Because UTS of Gr 60 is lower. Hence Gr 70 is not recommended.
Thanks & Regards
Krishna Mudhale
Mob: +91-9860459776/ 8796076925

On 11-Sep-2014 1:30 pm, "Jignesh Desai" <jignesh....@gmail.com> wrote:

Please refer Clause 1.2 of NACE SP 0472-2010 which excludes steels with greater than 480 MPa (70,000 psi) minimum specified tensile strength.

 

I have below queries related to applicability of NACE SP 0472-For SA 516-70 Material.

 

1. As per ASME Sec IX, the minimum specified tensile strength of SA 516 Grade 70 is 70 Ksi (485 Mpa), which is higher than above NACE clause, Hence advise whether NACE SP 0472 is applicable to SA 516 Grade 70?

 

Would appreciate the expert opinion on with possible technical justification?

 

Regds/Jignesh

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