The aluminum that window frames, curtain wall mullions, and most of the silver extruded shapes in the world are made of. Slightly weaker than 6061 but flows through extrusion dies more cleanly — tighter corners, sharper detail, glossier as-extruded surface. The architectural alloy.
Heat-treatable Al-Mg-Si alloy (0.5% Mg, 0.4% Si nominal — leaner than 6061). Optimized for extrudability rather than strength; flows at lower pressures, allows tighter section geometry and superior surface finish off the press. T5 (cooled from extrusion temperature + aged) is standard architectural temper. Tensile 185 MPa T5, 240 MPa T6.
That unboxing, handlebar-straightening and assorted nut-tightening marked the end of this bike's journey of over twenty thousand kilometres to start its working life speeding me to and from work.
Principled BSDF defaults derived from the sphere metallic finish. Reasonable seed for Blender, Substance, Keyshot, Rhino — tune per material. Or grab the whole library at once: ForMaterials library →
# finish: metallic albedo #c0c4cb metallic 1.00 roughness 0.25 ior 1.45 transmission 0.00 clearcoat 0.00 sheen 0.00 anisotropic 0.00
{
"albedo": "#c0c4cb",
"metallic": 1.0,
"roughness": 0.25,
"ior": 1.45,
"transmission": 0.0,
"clearcoat": 0.0,
"sheen": 0.0,
"anisotropic": 0.0
}
# Blender 4.x — Principled BSDF
# Aluminum 6063 · finish: metallic
import bpy
mat = bpy.data.materials.new(name="mat_aluminum_6063")
mat.use_nodes = True
bsdf = mat.node_tree.nodes["Principled BSDF"]
bsdf.inputs["Base Color"].default_value = (0.5271, 0.552, 0.5972, 1.0)
bsdf.inputs["Metallic"].default_value = 1.000
bsdf.inputs["Roughness"].default_value = 0.250
bsdf.inputs["IOR"].default_value = 1.450
bsdf.inputs["Transmission Weight"].default_value = 0.000
bsdf.inputs["Coat Weight"].default_value = 0.000
bsdf.inputs["Sheen Weight"].default_value = 0.000
bsdf.inputs["Anisotropic"].default_value = 0.000
# KeyShot 11+ — lux Python API, Generic material
# Aluminum 6063 · finish: metallic
# Run from Window → Scripting Console
import lux
mat = lux.createMaterial(name="mat_aluminum_6063", materialType="Generic")
mat.setProperty("diffuse", (192, 196, 203)) # 8-bit sRGB
mat.setProperty("metallic", 1.000)
mat.setProperty("roughness", 0.250)
mat.setProperty("indexOfRefraction", 1.450)
mat.setProperty("transparency", 0.000)
mat.setProperty("coatingWeight", 0.000)
{
"_format": "Substance Designer / Painter \u2014 pbrMetalRough constants",
"_about": "Aluminum 6063 \u00b7 finish: metallic",
"baseColor": {
"r": 0.5271,
"g": 0.552,
"b": 0.5972
},
"metallic": 1.0,
"roughness": 0.25,
"ior": 1.45,
"opacity": 1.0,
"anisotropyLevel": 0.0,
"_notes": "Channels listed are the standard Substance pbrMetalRough output. Drop into a Uniform Color node per channel, or as the constant input on a layered stack."
}{
"asset": {
"version": "2.0",
"generator": "ForMatter"
},
"materials": [
{
"name": "mat_aluminum_6063",
"pbrMetallicRoughness": {
"baseColorFactor": [
0.5271,
0.552,
0.5972,
1.0
],
"metallicFactor": 1.0,
"roughnessFactor": 0.25
},
"extensions": {
"KHR_materials_ior": {
"ior": 1.45
}
}
}
]
}# USD Preview Surface — UsdShade.MaterialLook prim attributes
# Aluminum 6063 · finish: metallic
def Material "mat_aluminum_6063" {
token outputs:surface.connect = </mat_aluminum_6063/PreviewSurface.outputs:surface>
def Shader "PreviewSurface" {
uniform token info:id = "UsdPreviewSurface"
color3f inputs:diffuseColor = (0.5271, 0.552, 0.5972)
float inputs:metallic = 1.000
float inputs:roughness = 0.250
float inputs:ior = 1.450
float inputs:opacity = 1.000
float inputs:clearcoat = 0.000
token outputs:surface
}
}
The extrusion alloy — what your 80/20 framing is made of. Mills like soft 6061; the as-extruded surface mills off cleanly with shallow stepdowns. Good practice material for student first-time aluminum cuts.
Machinery's Handbook 30th ed.; Sandvik aluminum machining guide for 6xxx series; Tormach speeds & feeds (6063-T5).
→ try this material in swarfASM Handbook Vol. 2; Aluminum Association extrusion-recycling notes.
House vocabulary — terms ForMatter uses with intent.
Materials and processes for people who design and make things.
A local-first library of materials, processes, applications, and finishes — equal weight, citable everywhere, so a student can move from "what is this" toward "what's actually buildable here, now, by me." Part of the renato.design ecosystem — sibling of Plenum, Specimen, Ingenue, gesture, graf, and the Renato Rhino plug-ins. Form and matter, inseparable.
Half of teaching materials is teaching how the material is made into the thing. The standard subscription library was always light on that half. The wedge here isn't better samples or a prettier interface — it's treating Process as a peer entity, not a footnote.
Conway, Lefteri, Forty, Sparke, ASM, GIA. Every voice: Voices.
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