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ZTW40.37 is a high density sponge iron powder characterized by its low impurity content and high consistency in chemical composition and particle size distribution. This powder has been specially designed to ensure optimal performance in high recovery covered electrodes as well as other basic electrodes that require higher density iron powder. It has been optimized in terms of density, particle shape, and surface condition, endowing it with superior properties.
The design of this powder allows for substantial additions to the formula while maintaining excellent extrusion properties, outstanding coating appearance, and stable welding performance. As a result, ZTW40.37 demonstrates significant advantages both in enhancing production efficiency and improving product quality.
Powder grades for welding applications:
As a key component in the production of a wide range of welding consumables, the characteristics of iron powders often have a direct influence on both welding properties and final weld metal quality. Our sponge and atomized gradesare distinguished by particle size distribution, chemical composition, particle morphology and apparent density. Choosing iron powders with suitable characteristics for a given application will result in enhanced efficiency and overall welding performance.
Benefits:
• Wide range of iron powders developed for welding applications
• Narrow specifications
• Consistent chemical and physical properties
• Low level of impurities
• Efficient logistics solutions and smart packaging
Specification of Sponge Iron powder
ZTW40.37
| Chemical Properties（%） | Unit | Specification | |
| Min | Max | ||
| C | % | 0.06 | |
| Si | % | 0.12 | |
| Mn | % | 0.20 | |
| P | % | 0.005 | |
| S | % | 0.010 | |
| V | % | 0.10 | |
| H2-Loss | % | 0.80 | |
| Fe | % | 98.00 | |
| Physical Properties | |||
| Apparent density | g/cm3 | 3.60 | 3.80 |
| Particle size distribution（%） | |||
| 500um | % | 0 | |
| 355um | % | 0 | 12 |
| 250um | % | 10 | 40 |
| 150um | % | 50 | 80 |
| 75um | % | 85 | 100 |
Specification of other iron powder for welding
Grade | Chemical composition/% | Apparent density g/cmᶟ | Particle size distribution/% | ||||||||||||||
| C | Si | Mn | P | S | V | H2-Loss | Fe | ||||||||||
Sponge iron powder | ZTW40.29 | ≤ 0.06 | ≤ 0.12 | ≤ 0.20 | ≤ 0.005 | ≤ 0.01 | - | ≤ 0.80 | ≥ 98 | 2.75-3.00 | ＋500um | ＋355um | ＋250um | ＋150um | ＋75um | ||
| 0 | ≤5 | 2-20 | 40-70 | 90-100 | |||||||||||||
ZTW 100.25 | ≤ 0.05 | ≤ 0.12 | ≤ 0.20 | ≤ 0.009 | ≤ 0.009 | ≤ 0.10 | ≤ 0.55 | ≥ 99 | 2.40-2.60 | ＋250um | ＋150um | ＋75um | ＋45um | ||||
| 0 | ≤10 | 40-80 | 70-95 | ||||||||||||||
ZTW100B | ≤ 0.07 | ≤ 0.25 | ≤ 0.20 | ≤ 0.015 | ≤ 0.015 | B | - | - | ＋150um | 75-150um | 45-75um | -45um | |||||
| 0.90-1.10 | 5 | Bal. | Bal. | 5-25 | |||||||||||||
Atomized iron powder | LAP40.30 | ≤ 0.01 | ≤ 0.10 | ≤ 0.15 | ≤ 0.02 | ≤ 0.012 | - | 0.50≤ | - | 2.80-3.20 | ＋425um | 100-425 um | -100um | ||||
| ≤2.0 | ≥70.0 | ≤10.0 | |||||||||||||||
LAP40.37 | ≤ 0.05 | ≤ 0.08 | ≤ 0.15 | ≤ 0.015 | ≤ 0.015 | - | ≤ 0.50 | - | 3.60-3.80 | ＋425um | 100-425 um | 63-150 um | -63 um | ||||
| ≤3 | ≥70.0 | 5-25 | ≤5 | ||||||||||||||
LAP 100.29 | ≤ 0.01 | ≤ 0.04 | ≤ 0.14 | ≤ 0.015 | ≤ 0.015 | - | ≤ 0.20 | ≥ 99.2 | Apparent density g/cmᶟ | Flow rate s/50g | Green density600Mpa g/cmᶟ | Particle size distribution/% | |||||
| 180-212um | 150-180um | 45-150 um | - 45 um | ||||||||||||||
| 2.95-3.10 | ≤28 | ≥7.13 | ≤1 | ≤10 | - | 15-30 | |||||||||||
Product Packing
1000kg per big flexbag and 25kg per small bag packed into one big bag.
Application
Welding electrodes, Welding wire,Cored wire,Surface coating,Foundry additive,Hardfacing,Alloy steel manufacturing.
ZTW40.37 is a high density sponge iron powder characterized by its low impurity content and high consistency in chemical composition and particle size distribution. This powder has been specially designed to ensure optimal performance in high recovery covered electrodes as well as other basic electrodes that require higher density iron powder. It has been optimized in terms of density, particle shape, and surface condition, endowing it with superior properties.
The design of this powder allows for substantial additions to the formula while maintaining excellent extrusion properties, outstanding coating appearance, and stable welding performance. As a result, ZTW40.37 demonstrates significant advantages both in enhancing production efficiency and improving product quality.
Powder grades for welding applications:
As a key component in the production of a wide range of welding consumables, the characteristics of iron powders often have a direct influence on both welding properties and final weld metal quality. Our sponge and atomized gradesare distinguished by particle size distribution, chemical composition, particle morphology and apparent density. Choosing iron powders with suitable characteristics for a given application will result in enhanced efficiency and overall welding performance.
Benefits:
• Wide range of iron powders developed for welding applications
• Narrow specifications
• Consistent chemical and physical properties
• Low level of impurities
• Efficient logistics solutions and smart packaging
Specification of Sponge Iron powder
ZTW40.37
| Chemical Properties（%） | Unit | Specification | |
| Min | Max | ||
| C | % | 0.06 | |
| Si | % | 0.12 | |
| Mn | % | 0.20 | |
| P | % | 0.005 | |
| S | % | 0.010 | |
| V | % | 0.10 | |
| H2-Loss | % | 0.80 | |
| Fe | % | 98.00 | |
| Physical Properties | |||
| Apparent density | g/cm3 | 3.60 | 3.80 |
| Particle size distribution（%） | |||
| 500um | % | 0 | |
| 355um | % | 0 | 12 |
| 250um | % | 10 | 40 |
| 150um | % | 50 | 80 |
| 75um | % | 85 | 100 |
Specification of other iron powder for welding
Grade | Chemical composition/% | Apparent density g/cmᶟ | Particle size distribution/% | ||||||||||||||
| C | Si | Mn | P | S | V | H2-Loss | Fe | ||||||||||
Sponge iron powder | ZTW40.29 | ≤ 0.06 | ≤ 0.12 | ≤ 0.20 | ≤ 0.005 | ≤ 0.01 | - | ≤ 0.80 | ≥ 98 | 2.75-3.00 | ＋500um | ＋355um | ＋250um | ＋150um | ＋75um | ||
| 0 | ≤5 | 2-20 | 40-70 | 90-100 | |||||||||||||
ZTW 100.25 | ≤ 0.05 | ≤ 0.12 | ≤ 0.20 | ≤ 0.009 | ≤ 0.009 | ≤ 0.10 | ≤ 0.55 | ≥ 99 | 2.40-2.60 | ＋250um | ＋150um | ＋75um | ＋45um | ||||
| 0 | ≤10 | 40-80 | 70-95 | ||||||||||||||
ZTW100B | ≤ 0.07 | ≤ 0.25 | ≤ 0.20 | ≤ 0.015 | ≤ 0.015 | B | - | - | ＋150um | 75-150um | 45-75um | -45um | |||||
| 0.90-1.10 | 5 | Bal. | Bal. | 5-25 | |||||||||||||
Atomized iron powder | LAP40.30 | ≤ 0.01 | ≤ 0.10 | ≤ 0.15 | ≤ 0.02 | ≤ 0.012 | - | 0.50≤ | - | 2.80-3.20 | ＋425um | 100-425 um | -100um | ||||
| ≤2.0 | ≥70.0 | ≤10.0 | |||||||||||||||
LAP40.37 | ≤ 0.05 | ≤ 0.08 | ≤ 0.15 | ≤ 0.015 | ≤ 0.015 | - | ≤ 0.50 | - | 3.60-3.80 | ＋425um | 100-425 um | 63-150 um | -63 um | ||||
| ≤3 | ≥70.0 | 5-25 | ≤5 | ||||||||||||||
LAP 100.29 | ≤ 0.01 | ≤ 0.04 | ≤ 0.14 | ≤ 0.015 | ≤ 0.015 | - | ≤ 0.20 | ≥ 99.2 | Apparent density g/cmᶟ | Flow rate s/50g | Green density600Mpa g/cmᶟ | Particle size distribution/% | |||||
| 180-212um | 150-180um | 45-150 um | - 45 um | ||||||||||||||
| 2.95-3.10 | ≤28 | ≥7.13 | ≤1 | ≤10 | - | 15-30 | |||||||||||
Product Packing
1000kg per big flexbag and 25kg per small bag packed into one big bag.
Application
Welding electrodes, Welding wire,Cored wire,Surface coating,Foundry additive,Hardfacing,Alloy steel manufacturing.
