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Grade Introduction:

Carbon Steel ASTM  SA105 Forged Fittings created in different evaluations of steel and its alloys. Our Forged Pipe Fittings are fabricated with the most extreme accuracy, guaranteeing that our scope of items agrees to universal quality parameters. our Carbon Steel Fittings are generally figured for sturdiness, erosion resistance and dimensional.

 

Grade Application:

This ASTM specification covers carbon steel forgings for piping applications such as flanges and fittings (45°eblow, 90°eblow, tee, coupling, etc)

 

Equivalent grades:

ASTM A 105, A 350 Gr LF1/LF2.

 

Addition to other grades:

MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, OHNS, D2, D3, H-11, H-13, CW-1, M2, M35, M42, 2714, SKD-11, P20, P20+S, P20+Ni, SCM 420, ASTM SA-36, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE 52100, S40C, S355J2G3.

 

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Chemical composition:

The following table shows the chemical composition of ASTM  SA-105 steel:

Element	C	Si	Mn	P	S	Mo	Ni	V	Cu	Ch
Content (%)	≤0.35	0.10-0.35	060-1.05	≤0.35	≤0.4	≤0.12	≤0.4	≤0.08	≤0.4	≤0.3

 

Mechanical Properties:

Tensile Strength min.		Yield Strength min.		Elongation min.	Reduction of Area, min.	Hardness
MPa	Ksi	MPa	ksi	%	%	HBW
485	70	250	36	22	30	137-187

 

Hardness:

137-187

 

Heat treatment:

Heat treatment is not required except for ASTM  SA 105 carbon steel forging. However, there are some exceptions that will require heat treatment to improve its mechanical properties for better application.

 

The typical heat treatment conducted for A105 carbon steel forgings includes annealing(A), normalizing(A), normalizing and tempering(NT), quenching and tempering(QT). Especially, normalizing at approximately 950°C for 2.5 hours is often required by many clients to eliminate possible internal stress in the forgings. These materials are usually marked as “ASTM  SA105N”.

 

Hardening:

850℃ to 870℃ oil quench

 

 

Tempering:

425℃ to 870℃ according to properties

 

 

Physical Properties:

Density (lb / cu. in.)	0.284
Specific Gravity	7.9
Specific Heat (Btu/lb/Deg F – [32-212 Deg F])	0.107
Melting Point (Deg F)	2740
Thermal Conductivity	360
Mean Coeff Thermal Expansion	6.7
Modulus of Elasticity Tension	30
Modulus of Elasticity Torsion	11

 

Thermal Properties:

Thermal Conductivity – 360

 

Forging Properties:

Commence 1150℃ Max finish 925℃.

 

ASTM  SA105 carbon steel can be forged at temperatures in the range of 2200 to 1700 F followed by quenching and tempering or normalizing. The actual hot forging temperatures in the closed die forging process will be decided by a number of factors, such as the complexity of the forged part.

 

The proper temperature of forging can only be checked at the beginning of forging, higher temperature will probably cause surface defects, such as mill scales, which will bring uneven surface. And lower temperature will be not conducive to the plastic deformation of C1045 carbon steel forged part.

 

SA105 forgings are limited to a maximum weight of 4540 kg [10000 lb]. As stated in our quality manual, welding repair of defects in ASTM  SA105 flanges or fittings is absolutely prohibited by Metals-Piping(although it is permissible by the standard). 

 

Stress Relieving:

50℃ under the temperature of tempering

 

 

Normalizing:

830℃ to 850℃ water quench

 

 

Annealing:

Annealing may be done by first allowing the forged parts to cool to below 1000 F and then reheat to between 1550 and 1700 F followed by slow furnace cooling.

800℃ to 830℃ Surface cool

 

870/ 915℃ air Cool

 

 

Density:

0.284

 

Machinability:

Machinability is good for any of the low alloy steels.

 

Welding:

The steel covered by this specification is weldable.

 

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