Wenzhou Zheheng Steel Industry Co.,Ltd
To provide safe and reliable high quality stainless steel ,nickel alloy pipes and fittings
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TP304/304H ASTM A312 stainless steel welded pipe heat exchange stainless steel coil tube
Material: 201,202,304,316,316L;
Standard: ASTM A 554;
Specifications:
20mm x 10mm, 20mmx40mm, 20mmx50mm
25mm x 13mm, 25mmx38mm, 25mmx50mm
30mm x 10mm, 30mmx15mm, 30mmx60mm
45mm x 75mm, 45mmx95mm,
50mm x 100mm, 150mmx100mm;
Thickness: 0.4mm To 3.0mm;
Length: 6m Or as customized;
Tolerance:
Thickness:+/-0.03mm
Dimension:+/-0.03mm
Length:+/-3-5mm
Surface Finish: Mill finish,BA polish(mirrior polish),hair brush ,circular satine polish,etc..
Payment Term: T/T:30% deposit and 70% pay against the Copy of B/L or L/C at sight
Permitted Variations in Wall Thickness
In addition to the implicit limitation of wall thickness
for seamless pipe imposed by the limitation on weight in
Specification A999/A999M, the wall thickness for seamless
and welded pipe at any point shall be within the tolerances
specified in Table 3, except that for welded pipe the weld area
shall not be limited by the “Over” tolerance. The wall thickness
and outside diameter for inspection for compliance with this
requirement for pipe ordered by NPS and schedule number is
shown in Table X1.1.
Mechanical Tests, Grain Size Determinations, and
Weld Decay Tests Required
1 Mechanical Testing Lot Definition—The term lot for
mechanical tests shall be as follows:
1.1 Where the final heat treated condition is obtained,
consistent with the requirements of 6.2, in a continuous
furnace, by quenching after hot forming or in a batch-type
furnace equipped with recording pyrometers and automatically
controlled within a 50 °F [30 °C] or lesser range, the term lot
for mechanical tests shall apply to all pipes of the same
specified outside diameter and specified wall thickness (or
schedule) that are produced from the same heat of steel and
subjected to the same finishing treatment within the same
operating period.
1.2 Where the final heat treated condition is obtained,
consistent with the requirements of 6.2, in a batch-type furnace
not equipped with recording pyrometers and automatically
controlled within a 50 °F [30 °C] or lesser range, the term lot
shall apply to the larger of: (a) each 200 ft [60 m] or fraction
thereof and (b) those pipes heat treated in the same furnace
batch charge for pipes of the same specified outside diameter
and specified wall thickness (or schedule) that are produced
from the same heat of steel and are subjected to the same
finishing temperature within the same operating period.
chemical composition:
| ASTM A213 / A213 M | ||
| Elements | 304L(wt%) | 316L (wt%) |
| (C) Carbon, max | 0.035 | 0.035 |
| (Mn) Manganese, max | 2 | 2 |
| (P) Phosphorus, max | 0.045 | 0.045 |
| (S) Sulfur, max | 0.03 | 0.03 |
| (Si) Silicon, max | 1 | 1 |
| (Ni) Nickel | 8.0 - 12.0 | 10.0 - 14.0 |
| (Cr) Chromium | 18.0 - 20.0 | 16.0 - 18.0 |
| (Mo) Molybdenum | N/A | 2.0 - 3.0 |
| (Fe) Iron | Bal. | Bal. |
| (Cu) Copper | N/A | N/A |
| (N) Nitrogen | N/A | N/A |
| Chemical Composition of Material | Material
Composition | 201 | 202 | 304 | 316 | 430 |
| C | ≤0.15 | ≤0.15 | ≤0.08 | ≤0.08 | ≤0.12 | |
| Si | ≤1.00 | ≤1.00 | ≤1.00 | ≤1.00 | ≤1.00 | |
| Mn | 5.5-7.5 | 7.5-10 | ≤2.00 | ≤2.00 | ≤1.00 | |
| P | ≤0.06 | ≤0.06 | ≤0.045 | ≤0.045 | ≤0.040 | |
| S | ≤0.03 | ≤0.03 | ≤0.030 | ≤0.030 | ≤0.030 | |
| Cr | 16-18 | 17-19 | 18-20 | 16-18 | 16-18 | |
| N | 3.5-5.5 | 4-6 | 8-10.5 | 10-14 | ||
| Mo | 2.0-3.0 | |||||
|
Mechanical Property | Material Item | 201 | 202 | 304 | 316 | |
| Tensile Strength | ≥535 | ≥520 | ≥520 | ≥520 | ||
| Yield Strength | ≥245 | ≥205 | ≥205 | ≥205 | ||
| Extension | ≥30% | ≥30% | ≥35% | ≥35% | ||
| Hardness (HV) | <253 | <253 | <200 | <200 | ||
| 410, 1.4501 |
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