There are various types of seamless alloy steel pipes/tubes to meet or exceed your unique requirement. We can also provide CUSTOM-MADE service like OEM, which is our strongest service such as the Laser / Plasma Cutting, Folding, Punching, Rolling, Bending, and Welding in a variety of steel processing can be the overall undertake, the accumulation of rich experience, superb technology, enjoy the reputation of honor “Steel Forming Magician”.

Seamless alloy tube


Standard & Material:


 GB5310-2013 Standard: 20G,25MnG, 15MoG,15CrMoG, 20MoG, 12CrMoG, 12Cr2MoG, 12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb, 15CrMoG, 10CrMo910

ASTM A209M/AS-209M Standard  A209T1/SA209 T1, A209 T1b/SA-209 T1b,  A209T1a/SA209 T1a

ASTM A213M/ASME SA 213 M Standard: T2, T5, T9, T11, T12, T22, T23, T24, T91, T911, T92, T122

ASTM A333M/ASME SA-333/SA333M Standard: Gr1, Gr3, Gr4, Gr6, Gr7,Gr8, Gr9, Gr10, Gr11
ASTM A334M/ASME SA-334/SA334M Standard: Gr1, Gr3, Gr6, Gr7,Gr8, Gr9, Gr11

ASTM A335/ASME SA335 Standard: P1, P2, P5,P5b, P5c, P9, P11, P12,P21,P22,P23, P24, P91, P92

ASTM A519 Standard: 4118, 4130,4135,4137,4140

ASTM A691 Standard GRADE 91, CM65, CM70, CM75, CMSH70, CMS75, CMSH80,

ASTM A691 Standard GRADE 1/2 Cr,  GRADE 1CR, GRADE 1 1/4 CR, 2 1/4 Cr, 3CR, 5CR, 9 CR

DIN17175 Standard: ST35.8, ST45.8, 15Mo3, 13CrMo44, 10CrMo910, 14MoV63,12Cr1MoV

EN10216-2 Standard: P195GH, P235GH, P265GH, 13CrMo4-5, 10CrMo9-10, 16Mo3, 10CrMo5-5, X10CrMoVNb9-1

JIS G3458 Standard: STPA12, STPA20, STPA22, STPA23, STPA24, STPA25, STPA26

JIS G3441 Standard:SCR420 TK,SCM415 TK, SCM418 TK, SCM420TK, SCM430TK, SCM435TK, SCM440TK.

NF A49-213/215 Standard: TU15D3, TU13CD4-04, TU10CD910, TUZ10CD505

Alloy C276 

BS3059 Standard: S1-622-440, S2-622-440, S1-622-490, S2-622-490, S1-629-470, S2-629-470, S2-629-590

BS3604Standard: HFS625  CFS625

BS3606Standard: CFS625

SEAMLESS ALLOY  TUBE SIZE: O.D:6-760mm  W.T:1-80mm  Fixed Length: 5.8m, 6m, 11.8m, 12m, or random length as required.


Q: Can you cut?

A: Yes. We offer fabrication services that include cutting, bending, shearing, saw cutting and welding

for all of our seamless alloy steel pipes and tubes.

Q: Can you provide diameter pipe outside of your typical size range?

A: Yes. North-Pipe has the ability to provide any diameter sized pipe that your application requires.

Contact our experienced representative and they will be able to help you source the exact material that

you required. Pls find our products offering for seamless alloy steel pipes&tubes.

Q: Is it possible for you to provide pipe with a special surface coating?

A: Yes. We can provide pipe with a wide variety of surface preparations that you may require.

Q: What’s HLSA?

A: High-strength low-alloy (HSLA) is the term applied to the flat by a small number of all kinds of

special additional alloying element exhibits excellent strength and toughness, but also enhance the

corrosion resistance. Such carbon usually have moderate low carbon content (0.05-0.1%), and the use

of one or more alloying elements niobium, titanium and vanadium, nearly at 0.01-0.05% level, so they are

also known as micro nickname alloy steel.