--- title: "Vapor Smoothing SAF and HSS Parts | AMT PostPro" description: "Vapor smoothing Stratasys SAF and voxeljet HSS parts with PostPro: published results, dimensional data, the agents for each, and which system fits." canonical: https://amtechnologies.com/learn/saf-hss-vapor-smoothing/ updated: 2026-10-07 type: learn --- Learn · SAF and HSS # Vapor smoothing for SAF and HSS parts. Vapor smoothing finishes Selective Absorption Fusion (SAF) and High Speed Sintering (HSS) parts the way it finishes other powder-bed parts: a controlled vapor reflows the porous surface into a smoother, sealed skin. On voxeljet HSS PA12, AMT measured ≤ 0.4%[1] dimensional change and +38.1% (XY)[1] elongation at break. [Test your parts, free](https://benchmarking.amtechnologies.com/submit?utm_source=amtechnologies.com&utm_medium=learn-page&utm_campaign=site-2026&utm_content=saf-hss-saf-hss-hero) [Get a price](https://amtechnologies.com/configurator/) No cost to evaluate · Parts returned · Typical turnaround 2–3 weeks[2] Printing process - **Dimensional change**: ≤ 0.4%[1] - PA12 · voxeljet HSS - **Elongation at break**: +38.1% (XY)[1] - PA12 · voxeljet HSS - **Agent**: PostPro Pure[3] - SAF PA12 · HSS PA11, PA12 Published results ## What AMT has published. Two powder-bed processes that fuse with infrared energy, both producing nylon parts with the porous surface vapor smoothing closes. ### Stratasys SAF AMT’s SAF whitepaper reports smoother surfaces, higher impact strength and dimensional accuracy maintained on SAF PA12 parts vapor smoothed with PostPro Pure.[4] [SAF whitepaper](https://amtechnologies.com/resources/whitepapers/vapor-smoothing-stratasys-saf/) ### voxeljet HSS - Dimensions ≤ 0.4%[1] Dimensional change PA12 · voxeljet HSS - Strength +38.1% (XY)[1] Elongation at break PA12 · voxeljet HSS [voxeljet HSS PA12 whitepaper](https://amtechnologies.com/resources/whitepapers/vapor-smoothing-voxeljets-hss-pa12-with-amt-postpro/) Materials ## SAF and HSS materials by finishing agent. SAF PA12 runs with PostPro Pure or FA326; HSS PA11 and PA12 with PostPro Pure. **SAF and HSS materials by finishing agent** | Process | Material | PostPro Pure | FA326 | FA9202 | | --- | --- | --- | --- | --- | | SAF | PA 12[3,5,6] | Listed | Listed | Not listed | | HSS | PA 11, PA 12[3] | Listed | Not listed | Not listed | Which PostPro ## Which PostPro for SAF and HSS parts. The same four systems serve every powder-bed process. Size by volume and part size. - Desktop SFX ### [PostPro SFX](https://amtechnologies.com/products/vapor-smoothing/postpro-sfx-desktop-vapor-smoothing-system/) Desktop vapor smoothing for R&D and low-volume production.[7] - Desktop SF2X ### [PostPro SF2X](https://amtechnologies.com/products/vapor-smoothing/postpro-sf2x/) Vapor smoothing with double the chamber capacity of the PostPro SFX.[7] - Production SF50 ### [PostPro SF50](https://amtechnologies.com/products/vapor-smoothing/postpro-sf50/) Delivers end-use parts for low-volume production.[7] - High volume SF100 ### [PostPro SF100](https://amtechnologies.com/products/vapor-smoothing/postpro-sf100/) Vapor smoothing sized for high-volume production.[7] [Help me choose](https://amtechnologies.com/configurator/) [See list prices](https://amtechnologies.com/pricing/) Questions ## SAF and HSS vapor smoothing: questions. Short answers from AMT’s published whitepapers and material lists. Anything else, [ask an engineer](https://share.hsforms.com/1lOH82JpuRdSM-4wJ1ZeYlw45o6d?website_source=Vapor+Smoothing&utm_source=amtechnologies.com&utm_medium=learn-page&utm_campaign=site-2026&utm_content=saf-hss-talk). ### Can SAF parts be vapor smoothed? Yes. SAF PA12 is listed with PostPro Pure and FA326, and AMT has published process insights on vapor smoothing SAF parts with PostPro Pure.[4] ### How much do HSS PA12 parts change dimensionally? In AMT’s published test on voxeljet HSS PA12, dimensional change was ≤ 0.4%[1]. ### Which consumable is used for SAF and HSS parts? PostPro Pure for both; FA326 is also listed for SAF PA12.[3] Next step ## See the price. Run the numbers. Hold the part. List prices are public and the cost-per-part math is yours to check, with no email needed for either. The free benchmark puts your own parts, vapor smoothed, in your hands. 1. 01 Quote ### Build your quote Pick a system and its options and get an itemized total on screen, from AMT’s published list prices. [Build your quote](https://amtechnologies.com/quote/) 2. 02 ROI ### Calculate your ROI Compare your cost per part with manual finishing, using your own labor rate and volumes. Every assumption is editable. [Calculate ROI](https://amtechnologies.com/roi/) 3. 03 Benchmark ### Test your parts, free Ship us your parts with a prepaid label. We vapor smooth them and send them back with before-and-after photos and a benchmark report. [Test your parts, free](https://benchmarking.amtechnologies.com/submit?utm_source=amtechnologies.com&utm_medium=learn-page&utm_campaign=site-2026&utm_content=saf-hss-decision) No cost to evaluate · Parts returned · Typical turnaround 2–3 weeks[2] Prices: AMT list prices, excluding tax and shipping; confirmed in your formal quote. [Not sure which system? Help me choose](https://amtechnologies.com/configurator/) ## Sources 1. [Vapor smoothing voxeljet's HSS PA12 with AMT PostPro (whitepaper)](https://amtechnologies.com/resources/whitepapers/vapor-smoothing-voxeljets-hss-pa12-with-amt-postpro/) · AMT · Feb 6, 2024 2. [PostPro benchmarking: send us your 3D printed parts](https://benchmarking.amtechnologies.com/) · AMT · read Oct 6, 2026 3. [Vapor smoothing consumables: PostPro Pure (FA5802), FA326 and FA9202](https://amtechnologies.com/products/vapor-smoothing/consumables/) · AMT · read Oct 6, 2026 4. [Vapor smoothing for Stratasys SAF: process insights (whitepaper)](https://amtechnologies.com/resources/whitepapers/vapor-smoothing-stratasys-saf/) · AMT · Mar 19, 2025 5. [PostPro compatible material list: PostPro Pure, FA5802, V3.2](https://6983077.fs1.hubspotusercontent-na1.net/hubfs/6983077/Website/Specification%20Sheets/AMT_MATERIALS_POSTPRO_SF_PURE_EN.pdf?ver=2) · AMT · Nov 2024 6. [PostPro compatible material list: FA326, V6.1](https://6983077.fs1.hubspotusercontent-na1.net/hubfs/6983077/Website/Specification%20Sheets/AMT_MATERIALS_POSTPRO_SF_FA326_EN.pdf?ver=2) · AMT · Apr 2025 7. [Vapor smoothing: SF and X-series family page and SFX, SF2X, SF50, SF100 product pages](https://amtechnologies.com/products/vapor-smoothing/) · AMT · read Oct 6, 2026 · also [AMT](https://amtechnologies.com/products/vapor-smoothing/postpro-sfx-desktop-vapor-smoothing-system/) · also [AMT](https://amtechnologies.com/products/vapor-smoothing/postpro-sf2x/) · also [AMT](https://amtechnologies.com/products/vapor-smoothing/postpro-sf50/) · also [AMT](https://amtechnologies.com/products/vapor-smoothing/postpro-sf100/)