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  • ASTM A860 Specification

Name:ASTM A860 Specification
Specificaiton:ASTM A860, MSS-SP-75
Size::1/4" to 120"
Rating:SCH10 through SCHXXS
Steel Grade:A860 WPHY 42, WPHY 52, WPHY 56, WPHY 60, WPHY 65, WPHY 70
MOQ:100 KGS
Ends:PL OR BE
Delivery term:FOB, CNF, CIF and EXW
Payment Term:TT or LC At sight
Loading Port:Tianjijn
Deliver mode:By Sea or By Land
Packing:In pallets, in plywood cases, in bulk

Product Description

ASTM A860 SPECIFICATION

Scope :

1.1 ASTM A860 specification covers wroughthigh – strength ferritic steel butt-welding fitting

of seamless and electric and fusion-weldedconstruction covered by the latest

revision of ASME B16.9 and MSS-SP-75 .Butt-welding fittings differing from these

ASME and MSS standards shall be furnishedin accordance with Supplementary

Requirements S58 of specification A960/A960M . These fittings are for use in

high – pressure gas and oil transmission and distribution system .

Process

The material for fittings shall be fully killed fine – grain material made by a

melting process that is intended to producer ounded , well dispersed , fine

sulphide inclusions , that promote good notch toughness , assists in the 

resistance to hydrogen induced cracking ,and for weldability suitable for field

welding .

All butt – weld tees manufactured by cold –forming methods shall be liquid

penetrant or magnetic particle examined by one of the specified in

supplementary Requirements S69 or S70 of Specification a960/A960M . this

examination shall be performed in accordance with a written procedure and

shall be performed after final heat treatment . only the side wall area of the test

needs be examined . this area is defined by a circle that covers area from the

weld bevel of the branch outlet to the center line of the body or run . Internal

and external surface shall be examined when size permits permits accessibility .

No cracks shall be permitted . other imperfections shall be treated in accordance

with 12.1 on finish . After the removal of any cracks , the tees shall be re-

examined by the removal of any Acceptable tees shall be marked with the

symbol PT or MT , as applicable , to indicate compliance . NDE personal shall be

qualified in accordance with SNT-TC-1A .

Heat Treatment :

All fittings shall be furnished in the heat-treated condition . fittings formed

above the transformation temperature orupon which welding is performed ,

ASTM A860/A860M-09 shall be cooled to below the lower critical temperature prior to heat treatment .

Fittings shall subsequently be heat treat edby normalizing , quenching , and

tempering or stress relieving in accordance with specification A960/A960M

 

Chemical Requirements table 1

 

Composition %

Heat Analysis

Carbon

 0.20ᴬ

 All values are
Maximum unless
A range is stated

Manganese 

1.00-1.45

Phosphorus 

0.03

Sulfur 

0.01

Silicon 

0.15-0.40ᴮ

Nickel

0.5

Chromium

0.3

Molybdenum

0.25

Copper

0.35

Titanium 

0.05

Vanadium 

0.1

Columbium

0.04

Vanadium plus Columbium

0.12

Aluminium 

0.06

 

Chemical Composition :

.1 The chemical composition of the steel shall conformed to the requirements

prescribed in Table 1 .

.2 The steel shall not contain any unspecified elements for the ordered grade to the

extent that it conformed to the requirements of another grade for which that

element is a specified element having are quired minimum content .

.3 Analysis of each heat of steel shall be made from a sample taken preferably

during the pouring of the heat . There sults shall conform to Table 1 for either

heat or specification A960/A960M for product analysis limits as applicable .

.4 The fittings manufacturer shall make a product analysis per heat from either the

starting material or from a fitting . The chemical composition thus determined

shall conform to Table 1. The product analysis shall be the basis for rejection . for

referee purposes , Test Method , Practices, and Terminology A751 shall Apply .

.5 The carbon equivalent of the base metal, as terminology A751 shall apply .

CN=C+mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15

6.6 weld metal used in the construction ofthe fittings shall conform to the tensile

and impact requirements of 9.4 and 8.1 after heat treatment in accordance with

Section 6 .A chemical analysis shall be performed on deposited weld metal for

each heat of filler metal or , for submerged arc welding , each heat of filler

metal and batch of flux the weld metal shall be deposited in accordance with the

qualified weld procedure .

.7 Only the carbon content of the deposited weld-metal composition need comply

with the requirements of table 1 .The nickel content of the deposited weld metal

shall not exceed 1.0 % .

Mechanical Requirements

Property

GRADE

WPHY 42

WPHY 46

WPHY 52

WPHY 60

WPHY 65

WPHY 70

Yield
Minᴬ 0.2
Ksi[MPa]

Strength ,
% offset,

42[290]

46[315]

52[360]

60[415]

65[450]

70[485]

Elongation:

60[415]

63[435]

66[455]

75[515]

77[530]

80[550]

Standard
Specimen,
Size
Specimen ,

Round
Or small
Proportional
Min,% in 4D

-85[585]

-88
[605]

-91[625]

-100
[690]

-102
[705]

-105
[725]

Rectangular
For section
5/16 in.
And over,
Sizes tested
Section;min,

specimen,
thickness
[7.94 mm]
And for all
In full
% in 2 in .
[50 mm]

25

25

25

20

20

20

Rectangular
For
Less than
[7.94 mm];
[50 mm].
Specimen

Specimen
Thickness
5/16 in.
Min % 2 in.
Width of
1.50 in .
[40 mm]

32

23

23

28

28

28

Rectangular
For
Less than
[7.94 mm];
[50 mm].
Specimen

Specimen,
Thickness
5/16 in .
Min, % 2 in .
Width of
1.50 in .
[40 mm]

B

B

B

B

B

B

Toughness:

Cᵥ energy
Measured

absorptionᶜ
;
at-50 °F
[-46 °C] .

 

 

 

 

 

 


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