GB/T18248 37Mn 37Mn2V 30CrMo 34CrMo4 35CrMo Precision Steel Tube Seamless for Gas Cylinder
Size range for GB/T18248 37Mn 37Mn2V 30CrMo 34CrMo4 35CrMo Precision Steel Tube: O.D.: 3-270mm W.T.: 0.5-50mm L:max12000mm
Material: Fine Grain Steel
E215,E235, E275, E315, E355, E470
C15, C22, 38Mn6, 41Cr4,
25CrMo4, 30CrMo4, 34CrMo4, 42CrMo4
37Mn, 37Mn2V, 30CrMo, 35CrMo
STH11,STH12,STH21,STH22,STH31
Applications for GB/T18248 37Mn 37Mn2V 30CrMo 34CrMo4 35CrMo Precision Steel Tube: for Gas Cylinder Applications, Oil Cylinders/Telescopic Cylinders, Mechanical and General Engineering Purposes.
OD Tolerance: +/- 0.75-1%
WT Tolerance: -10%,+12.5-15%
Steel Grade and Chemical Compositions for Precision Steel Tube:
| STEEL GRADE | CHEMICAL COMPOSITIONS,% |
| C | Si | Mn | P | S | P+S | Cr | Mo | V | Ni | Cu |
| 37Mn | 0.34-0.40 | 0.10-0.30 | 1.35-1.65 | ≤0.030 | ≤0.030 | ≤0.055 | ≤0.30 | - | - | ≤0.30 | ≤0.20 |
| 34Mn2V | 0.30-0.37 | 0.17-0.37 | 1.40-1.75 | ≤0.030 | ≤0.030 | ≤0.055 | ≤0.30 | - | 0.07-0.12 | ≤0.30 | ≤0.20 |
| 30CrMo | 0.26-0.34 | 0.17-0.37 | 0.40-0.70 | ≤0.030 | ≤0.030 | ≤0.055 | 0.80-1.10 | 0.15-0.25 | - | ≤0.30 | ≤0.20 |
| 35CrMo | 0.32-0.40 | 0.17-0.37 | 0.40-0.70 | ≤0.030 | ≤0.030 | ≤0.055 | 0.80-1.10 | 0.15-0.25 | - | ≤0.30 | ≤0.20 |
| Steel Grade | Minimum tensile properties |
| Steel name | Steel number | Yield
strength(ReH)
Mpa | Tensile
strength(Rm)
Mpa | A
% |
| For T in mm | For T in mm | For T in mm |
≤
8 | >
8 | >
20 | >
50 | ≤8 | >
8 | >
20 | >
50 | ≤8 | >8 | >
20 | >
50 |
| | ≤20 | ≤50 | ≤80 | | ≤20 | ≤50 | ≤80 | | ≤20 | ≤
50 | ≤
80 |
| l | t | l | t | l | t | l | t |
| 25CrMo4 | 1.7218 | 700 | 600 | 450 | 400 | 900 | 800 | 700 | 650 | 12 | 10 | 14 | 12 | 15 | 13 | 16 | 14 |
| 30CrMo4 | 1.7216 | 750 | 630 | 520 | 480 | 950 | 850 | 750 | 700 | 12 | 10 | 13 | 11 | 14 | 12 | 15 | 13 |
| 34CrMo4 | 1.7220 | 800 | 650 | 550 | 500 | 1000 | 900 | 800 | 750 | 11 | 9 | 12 | 10 | 14 | 12 | 15 | 13 |
| 42CrMo4 | 1.7225 | 900 | 750 | 650 | 550 | 1100 | 1000 | 900 | 800 | 10 | 8 | 11 | 9 | 12 | 10 | 13 | 11 |
| Mechanical properties at room temperature |
| Steel Grade | Minimum values for the delivery condition |
| Steel Name | Steel Nubmer | (+Cc) | (+LCc) | (+SR) | (+Ad) | (+N) NBK |
| Rm Mpa | A % | Rm Mpa | A % | Rm Mpa | ReH Mpa | A % | Rm Mpa | A % | Rm Mpa | ReH Mpa | A % |
| E215 | 1.0212 | 430 | 8 | 380 | 12 | 380 | 280 | 16 | 280 | 30 | 290-430 | 215 | 30 |
| E235 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 350 | 16 | 315 | 25 | 340-480 | 235 | 25 |
| E355 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 450f | 10 | 450 | 22 | 490-630 | 355 | 22 |
GB/T18248 37Mn 37Mn2V 30CrMo 34CrMo4 35CrMo Precision Steel Tube
Production Process of GB/T18248 37Mn 37Mn2V 30CrMo 34CrMo4 35CrMo Precision Steel Tube
Production Workshop for GB/T18248 37Mn 37Mn2V 30CrMo 34CrMo4 35CrMo Precision Steel Tube
Delivery and Packing of GB/T18248 37Mn 37Mn2V 30CrMo 34CrMo4 35CrMo Precision Steel Tube
FAQ for GB/T18248 37Mn 37Mn2V 30CrMo 34CrMo4 35CrMo Precision Steel Tube
1. who are we?
TORICH is not only professional manufacturer and exporter, but also international marketing and sales
company in the field of steel tubes from China. Our factory was established in 1997, with the name of Ha-
iyan Sanxin Steel Pipe Co., Ltd. Our technicians are equipped with great engineering experience in steel
pipe industry for more than 22 years, they have great command of production technology for Cold Drawing
and Cold Rolling, as well as heat treatment and inspection. So we have a strong technician team and manufacturing capability.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Stainless Steel/Carbon Steel/AlloySteel,Titanium,Copper/Brass,etc.
4. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES;
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,MoneyGram,Credit Card,PayPal,Western Union,Cash,Escrow;
Language Spoken:English,Spanish,Japanese,Portuguese,German,Arabic,French,Russian,Korean,Hindi,Italian
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