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37Mn 34Mn2V 30CrMo 35CrMo Seamless Steel Tube / Cold Rolled Carbon Steel Pipe

37Mn 34Mn2V 30CrMo 35CrMo Seamless Steel Tube / Cold Rolled Carbon Steel Pipe
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Product: 37Mn 34Mn2V 30CrMo 35CrMo Seamless Steel Tubes High Pressure Vessels Gas Cylinders
Standard: ASTM, BS, DIN, GB, JIS
Grade: 37Mn 34Mn2V 30CrMo 35CrMo STH11 STH12 STH21 STH22
Thickness: 2 - 20 Mm
Outer Diameter: 20 - 610 Mm
Technique: Cold Rolled
Application: Structure Pipe, Fluid Pipe
Surface: Galvanized Coated, Bare, Oil, Paint, Varnish
Length: 1-12m
Keyword: Cold Rolled Carbon Pipe
High Light:

low carbon steel


carbon steel seamless pipes

Basic Infomation
Place of Origin: CHINA
Brand Name: HAOSTEEL
Certification: ISO9001
Model Number: 37Mn 34Mn2V 30CrMo 35CrMo STH11 STH12 STH21 STH22
Payment & Shipping Terms
Packaging Details: Woven bags and plastic strips inside packing, wooden / iron pallet and steel strips outside packing.
Delivery Time: 5-10 working days after order confirmed and receive deposit
Payment Terms: L/C, T/T
Supply Ability: 5000tons per month
Product Description

37Mn 34Mn2V 30CrMo 35CrMo Seamless steel tubes high pressure vessels gas cylinders


Carbon steel pipe can be divided into seamless steel pipe, straight steel pipe, spiral steel pipe, high frequency welded steel pipe and so on.Carbon steel seamless steel pipe is a kind of long steel.
The pipe has a hollow section and is used in a large number of pipelines for fluid transportation, such as those for oil, natural gas, gas, water and some solid materials.
Generally, the outer diameter of hot-rolled seamless pipe is greater than 32mm, the wall thickness is 2.5-75mm, the outer diameter of cold-rolled seamless pipe can be up to 6mm, the wall thickness can be up to 0.25mm, and the outer diameter of thin-walled pipe can be up to 5mm, the wall thickness is less than 0.25mm, and the precision of cold rolling is higher than that of hot rolling.
General carbon steel pipe: it is made of 16Mn, 5MnV and other low-alloy structural steels, such as 10, 20, 30, 35, 45, 45 etc.Seamless pipes made of mild steel such as 10 and 20 are mainly used for fluid transportation pipes.The seamless pipe made of medium carbon steel such as 45 and 40Cr is used to make mechanical parts, such as mechanical parts of cars and tractors.Carbon steel tubes are generally used for strength and flattening tests.The hot-rolled steel pipe is delivered in the hot-rolled or heat-treated condition;Cold rolling is delivered as heat treatment.


Standard:GB 18248, JIS G3429, ASTM A372, ISO 11120

Major steel pipe brands:37Mn, 34Mn2V, 30CrMo, 35CrMo, STH11, STH12, STH21, STH22, etc.

Weight:Steel pipes shall be delivered according to actual weight.
According to the requirements of the buyer, through consultation between the supplier and the supplier, and indicated in the contract, the goods can also be delivered according to the theoretical weight

Mechanical property

Standard Grade Tensile strength (MPa) yield strength elongation
GB 18248 37Mn ≥750 ≥630 ≥16
34Mn2V ≥745 ≥530 ≥16
30CrMo ≥930 ≥785 ≥12
35CrMo ≥980 ≥835 ≥12
Standard Grade Chemical composition, %
C Si Mn P,S Cu Ni Mo Cr V
GB18248 37Mn 0.34~0.40 0.10~0.30 1.35~1.65 ≤0.030 ≤0.20 ≤0.30 / ≤0.30 /
34Mn2V 0.30~0.37 0.17~0.37 1.40~1.75 ≤0.030 ≤0.20 ≤0.30 / ≤0.30 0.07~0.12
30CrMo 0.26~0.34 0.17~0.37 0.40~0.70 ≤0.030 ≤0.20 ≤0.30 0.15~0.25 0.80~1.10 /
35CrMo 0.32~0.40 0.17~0.37 0.40~0.70 ≤0.030 ≤0.20 ≤0.30 0.15~0.25 0.80~1.10 /
JIS G3429 STH11 ≤0.50 0.10~0.35 ≤1.80 ≤0.035 / / / / /
STH12 0.30~0.41 0.10~0.35 1.35~1.70 ≤0.030 / / / / /
STH21 0.25~0.35 0.15~0.35 0.40~0.90 ≤0.030 / ≤0.25 0.15~0.30 0.80~1.20 /
STH22 0.33~0.38 0.15~0.35 0.40~0.90 ≤0.030 / ≤0.25 0.15~0.30 0.80~1.20 /


Similar comparison of domestic and foreign brands

GB 18248 JIS G 3429 ISO 11120 EN 10297-1 ASTM A372 DOT 49CFR§178.37



/ 38Mn6 Grade C






/ / / /
30CrMo STH21 GroupⅡ 30CrMo4 Grade E 4130X
35CrMo STH22 GroupⅡ 34CrMo4 / /
34CrMo4 STH22 GroupⅡ 34CrMo4 / /
30CrMnSiA / / / / /

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37Mn 34Mn2V 30CrMo 35CrMo Seamless Steel Tube / Cold Rolled Carbon Steel Pipe 0 


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