Customization: | Available |
---|---|
Type: | Seamless |
Technique: | Cold Drawn |
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cold finished seamless steel tube for Mechanical and Automobile | |||
MATERIAL | Standards | TDR Standards | Steel Grades |
DIN | 1629 | ST 37 / 44 / 52 | |
1630 | ST 37.4 / 44.4 / 52.4 | ||
179367 | ST 35 / 45 / 52 | ||
GB/T | 8162 | 10#, 20#, 16Mn | |
8163 | |||
3639 | |||
EN | 10305-1 | E215/235/355/255 | |
10305-4 | E215/235/355/255 | ||
JIS | G3445 | STKM11, STKM12, STKM13,STKM20 | |
ASTM | A822-A450 | A822 | |
ISO | 8535 | ST 35 / 45 / 52 | |
ASTM | A519 | 1010/1020/1045 | |
ASTM | A179-A450 | A179 | |
BS | BS 3602 | CFS 360 | |
BS | BS 6323 | CFS3,CFS4 |
TOLERANCE TABLE OF STEEL TUBE | |||||
NAME | SCOPE MM | GB SERIES | DIN SERIES | ENTERPRISE INTERNAL CONTROL STANDARD mm |
SPECIAL HIGH PRECISION mm |
OD | 4-30 | ±0.10 | ±0.08 | ±0.05 | ±0.03 |
31-40 | ±0.15 | ±0.15 | ±0.05 | ±0.03 | |
41-50 | ±0.20 | ±0.20 | ±0.05 | ±0.03 | |
51-60 | ±0.25 | ±0.25 | ±0.05 | ±0.03 | |
W.T. | 0.5-7 | ±0.1,min±0.12 | ±0.1 | ±0.1,min±0.05 | ±0.1,min0.03 |
Table 1- Chemical composition | ||||||
Steel Grade | C% | Si% | Mn% | P% | S% | AL% |
St30Al or E215 | ≤0.10 | ≤0.05 | ≤0.7 | ≤0.025 | ≤0.025 | ≥0.025 |
St35 or E235 | ≤0.17 | ≤0.35 | 0.4-1.2 | ≤0.025 | ≤0.025 | |
St45 or E255 | ≤0.21 | ≤0.35 | 0.4-1.1 | ≤0.025 | ≤0.025 | |
St52 or E355 | ≤0.22 | ≤0.55 | ≤1.6 | ≤0.025 | ≤0.025 |
Table 2 - Mechanical properties at room temperature | |||||||||
Delivery condition | BK | BKW | GBK | NBK (N) | |||||
steel Grade | Rm Mpa (Min) | A % (Min) |
Rm Mpa (Min) |
A % (Min) |
Rm Mpa (Min) |
A % (Min) |
Rm Mpa (Min) |
ReH Mpa (Min) |
A % (Min) |
St30Al or E215 | 430 | 8 | 380 | 12 | 280 | 30 | 290 to 430 | 215 | 30 |
St35 or E235 | 480 | 6 | 420 | 10 | 315 | 25 | 340 to 480 | 235 | 25 |
St45 or E255 | 580 | 5 | 520 | 8 | 390 | 21 | 440 to 570 | 255 | 21 |
St52 or E355 | 640 | 4 | 580 | 7 | 450 | 22 | 490 to 630 |
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