Gas spring and shock absorber 21*1 seamless steel tubes
Product Description
DIN high precision cold-rolled seamless steel tube
Synopsis of Craft: quality carbon steel-cold rolled-heat treatment without oxidization (NBK Status)-nondestrutive testing.
In the wall honing and inside flushing under the high pressure.Antirust oiling outside surface-plastic capping on both ends.
Main Features:High precision, excellent brightness, no oxidization on the outer and inner walls after heat treatments, high cleanness of inside wall. The steel tube is able to withstand high pressure. No deformation after cold bending,no crack after flaring and flattening. The complicated geometrical forming and machining can be realized.
Color of tube: Gray with white.
Main Application: To be used in hydraulic system,automobile and in the occasion where the high precision, brightness,cleanness and mechanical properties of the tube are required.
Material | Carbon Steel |
Section Shape | Round |
Surface treatment | Oiled |
Outer Diameter | 21*1 |
Seamless Steel Tube Standard | DIN2391, DIN17175, ASTM A106, ASTM A213, ASTM A53, ASTM A312, ASTM A179, SAE 4130. JIS G3445, JIS G3444, JIS G 3461, JIS G3441, JIS G3454 etc |
Steel Tube Grade | 1010 (10#, STS38,STKM11A,STKM12A,STKM13C, A106 Gr.A,St35.8, St37,St35,E215 etc) 1020 (20#, STPG42,STKM12B,STKM12C,STKM13A,STKM13B,A106Gr.B, A53.B, St45.8,St44, St45, E235 etc) 1045 (45#),St52 (16Mn, E355),30CrMo(4130) |
Packing Details | 1.Internal wrapped with plastic film. External wrapped with woven bags. 2. wooden boxes to pack. 3. Iron stand. |
Certification | ISO9001 |
Delivery condition | BK |
Length | 1-12m as customer's requestment |
Chemical composition comparison Sheet:
Steel Grade | C | Si | Mn | S | P | Cr | Ni | Cu |
STKM12B | 0.22 | 0.22 | 0.41 | 0.006 | 0.026 | 0.04 | 0.02 | 0.01 |
Mechanical property:
Size | Tensile Strength | Yield strength | Elogation |
Mpa | Mpa | % | |
15*2.3 | 703 | 634-649 | 12 |