MATERIAL DESCRIPTION

AISI 4130 is a low alloy C-steel containing chromium and molybdenum as strengthening agents. It has low carbon content, and hence it can be welded easily. It is supplied as round bar commonly in the hardened and tempered condition with a hardness of 18-22 HRc.

APPLICATIONS

AISI 4130 is a low alloyed, hardened and tempered steel used for oil & gas drilling and production equipment – wellhead and christmas tree equipment.

Heat Treatment
Hardened at 860°C followed by water quenching. Tempering at min. 650°C, cooled in air.

Weldability
Good.

CHEMICAL COMPOSITION

Weight % C SI MN CR MO S P
MIN.  0,28  0,15  0,40  0,80  0,15
MAX.  0,33  0,35  0,60  1,10  0,25  0,035  0,025

Product Standards: ASTM A29 (4130), UNS G41300.
Approvals: NACE MR0175 when hardness is 22 HRC max., API 6A.

Mechanical Properties

Yield strength
RP0.2, MPA
Tensile strength
RM, MPA
Elongation
[%]
Hardness
[HRC]
Impact, Charpy-V, -32ºC
[J]
60K  ≥ 414  ≥ 586  ≥ 18  22 MAX  ≥ 42
75K  ≥ 517  ≥ 655  ≥ 17  22 MAX  ≥ 42

ROUND BAR STOCK – MIN YLD 75 KSI

DIA
3″
4″
4.5″
130 mm
6″
165 mm
180 mm
190 mm
8″
8,5″
10″
12″
14″
16″
20″

BORED BAR STOCK –  MIN YLD 75 KSI

DIA
130mm OD x 2.25″ ID
130mm OD x 3″ ID
140mm OD x 2.5″ ID
6.5″ OD x 2.25″ ID
170mm OD x 2.13/16″ ID
180mm OD x 2.25″ ID
180mm OD x 2.13/16″ ID
8″ OD x 2.25″ ID
8″ OD x 3″ ID
10″ OD x 3″ ID
12″ OD x 3″ ID