STOCKIST & EXPORTERS OF ASTM A 519 4130/4140 PIPES (AN ISO 9001:2008 CERTIFIED COMPANY)
   

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Aisi 4130 properties

Reliable Pipes & Tubes Limited is one of the leading manufacturer & stockist of ASTM A519 4130 Seamless Pipes & 4130 Fittings. Reliable is one of the largest stockist & distributor of AISI & SAE 4130 fittings. Seamless Pipe is tubing made to the pipe schedule. Alloy pipe in the power industry generally refers to A335 material, but in the oil and gas market, 4130 pipe is used. This product is made to the pipe schedule but uses A519-4130 as the controlling seamless specification. The material is then heat treated to L80, P110 or the customer’s specified properties. This material is easily welded and is generally used for above ground applications and utilizes the fittings, flanges and other piping components with the same 4130 chemistry.

Technical data - AISI 4130


Alloy Steels 4130

  • Specifications
  • Related Tradenames and Metal Names
  • Chemistry Data
  • Welding, Machining/ General Data
  • Physical Data
  • Mechanical Data
  • Links to Related Data
 

Specifications

The following specifications cover Alloy Steels 4130

  • AISI 4130
  • AMS 6348
  • AMS 6350
  • AMS 6351
  • AMS 6360
  • AMS 6361
  • AMS 6362
  • AMS 6370
  • AMS 6371
  • AMS 6373
  • AMS 6374
  • AMS 6528
  • AMS 7496
  • ASTM A29
  • ASTM A322
  • ASTM A331
  • ASTM A506
  • ASTM A507
  • ASTM A513
  • ASTM A519
  • ASTM A646 (Forging - Open Die)
  • ASTM A752
  • ASTM A829 (Plate)
  • MIL S-18729
  • MIL S-6758
  • SAE J1397
  • SAE J404
  • SAE J412
  • UNS G41300

Property Results

Related Metals:

  • Chrome Moly - 4130

Chemistry Data[top]


Carbon

0.28 - 0.33

Chromium

0.8 - 1.1

Manganese

0.7 - 0.9

Molybdenum

0.15 - 0.25

Phosphorus

0.035 max

Silicon

0.15 - 0.35

Sulphur

0.04 max

 



Principal Design Features

AISI 4130 is a low alloy steel containing molybdenum and chromium as strengthening agents. The carbon content is nominally 0.30% and with this relatively low carbon content the alloy is excellent from the fusion weldability standpoint. The alloy can be hardened by heat treatment.

Applications

Typical applications for 4130 low alloy steel include. structural use such as aircraft engine mounts and welded tubing applications.

Machinability

This alloy is readily machined by conventional methods. Machinability is best with the alloy in the normalized and tempered condition. Although the alloy may be machined in the fully heat treated condition, machinability becomes more difficult with increasing strength (hardness) of the alloy.

Forming

Formability is best in the Annealed condition for which the ductility is very good, Bend radii of 1t on Annealed sheet material may be made.

Welding

4130 alloy is noted for its weldability by all of the commercial methods.

Heat Treatment

Heating at 1600 F followed by an oil quench will harden the 4130 alloy. For best results a normalizing pre-hardening heat treatment may be used at 1650 to 1700 F followed by the 1600 F soak and oil quench.

Forging

Forge at 2200 F maximum down to 1750 F.

Hot Working

4130 in the Annealed condition has excellent ductility. Thus it is usually not necessary to do hot working to form parts. If hot working is needed it can be done in the range of 2000 F to 1500 F.

Cold Working

Cold working by conventional methods is readily accomplished on this alloy.

Annealing

4130 (and most of the other low alloy steels) may be Annealed at 1550 F for a time long enough to allow thorough heating of the section size. It should then be cooled in the furnace at a rate of less than 50 F per hour down to 900 F, followed by air cooling from 900 F.

Aging

Not applicable to this alloy.

Tempering

Tempering is done to restore some of the ductility that may be lost after the hardening heat treatment and quench. Alloy 4130 is tempered at between 750 F and 1050 F, depending upon the strength level desired. The lower the tempering temperature the greater the strength.

Hardening

Hardening is accomplished by heat treatment or by cold working -- see "Heat Treatment".

Other Comments

The 4130 alloy is a through hardening alloy and should not be case hardened.

Physical Data : 


Density (lb / cu. in.)

0.283

Specific Gravity

7.8

Specific Heat (Btu/lb/Deg F - [32-212 Deg F])

0.114

Melting Point (Deg F)

2610

Thermal Conductivity

22.3

Mean Coeff Thermal Expansion

7

Modulus of Elasticity Tension

29



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