Product name	ASTM High Quality Chinese Factory Price Steel Pipes Welded Seamless Steel Tubes
Surface treatment	Bare,Oil,Painting,Galvanized,3PE
Technique	Cold/Hot rolled,Cold-Drawn,or Hot Forged
Standard	ASTM,GB,JS,DIN,AISI
Outer Diameter	Customized
Width	Customized
Processing Service	Welding, Punching, Cutting, Bending
Shape	Square, round, rectangular, customized
Application field	Marine applications, Fluid Pipe,Boiler Pipe,Drill Pipe,Hydraulic Pipe,Gas Pipe,OIL PIPE,Chemical Fertilizer Pipe,Structure Pipe
Material	A106B,A210C,A333,A335-P11,A335-T11,DIN17175,SEW680,SEW610
Oiled or Non-oiled:	Non-oiled or Slightly Oiled or Heavy Oiled or Shop primer and shot blasting

What is 4130 steel?

AISI 4130 alloy steel is a medium carbon, low alloy steel in ASTM A29 standard. ASTM 4140 steel is also commonly referred to as a chromoly steel, or chrome moly steel, containing nominally 0.28-0.33% Carbon, 0.8-1.1% Chromium and 0.15-0.25% Molybdenum. It is similar to 4140 steel which has a higher carbon level (0.28-0.33%), giving 4130 material improved weldability, at the expense of through thickness strength. With the proper heat treatment it is also readily machined. Annealing ASTM 4130 alloy steel offers excellent ductility. AISI 4130 steel is usually supplied as round bar commonly in the hardened and tempered condition.

AISI/SAE 4130 steel grade is a versatile alloy with good atmospheric corrosion resistance and reasonable strength up to around 315º C (600º F). It shows good overall combinations of strength, toughness and fatigue strength.

This AISI standard belongs to the ASTM A29 group.

ASTM A29 is the standard specification for carbon steels and alloyed structural steels to which the following AISI standards can be assigned.

Under the standardization AISI 4130, we understand the following material grades in the German material system:

1.7218 - 25CrMo4

AISI 4130 alloy steel is a low alloy medium carbon steel according to ASTM A29. AISI 4130 steel is commonly referred to as Chromoly steel or chrome moly steel.

It resembles the AISI 4140 (1.7225 / 42CrMo4) but has a lower carbon content (0.28-0.33%), giving the 4130 material improved weldability.
 

Standard	Grade	C	Mn	P	S	Si	Cr	Mo
ASTM A29	4130	0.28-0.33	0.40-0.60	<0.035	<0.040	0.15-0.35	0.80-1.10	0.15-0.25

With the right heat treatment (normalize, annealing), it is easy to work. In the tempered state, the processing is a little more demanding. Overall, it shows a good combination of strength, wear resistance and toughness.

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: BAR

	Yield strength Rp0.2, MPa	Tensile strength Rm, MPa	Elongation [%]	Hardness [HRC]	Impact, Charpy-V, -32ºC [J]
60 ksi	≥ 414	≥ 586	≥ 18	22 MAX	≥ 42
75 ksi	≥ 517	≥ 655	≥ 17	22 MAX	≥ 42

Other Designations

Other designations that are equivalent to AISI 4130 alloy steel include the following;

AMS 6348	AMS 6371	ASTM A331	ASTM A829	DIN 1.7218
AMS 6350	AMS 6373	ASTM A506	MIL S-18729	UNI 25 CrMo 4
AMS 6351	AMS 6374	ASTM A507	MIL S-6758	JIS SCCrM 1
AMS 6360	AMS 6528	ASTM A513	SAE J1397	JIS SCM 2
AMS 6361	AMS 7496	ASTM A519	SAE J404	SS 2225
AMS 6362	ASTM A29	ASTM A646	SAE J412	B.S. CDS 110
AMS 6370	ASTM A322	ASTM A752	AFNOR 25 CD 4 (S)	SAE J770