GL28h vs GL30h

GL30h is 1.1 times as stiff as GL28h. Their densities are about the same. Per unit mass they are about equally stiff (27.39 and 28.33 MJ/kg). Strength: f_m,k = 28 MPa for GL28h, f_m,k = 30 MPa for GL30h.

GL28h EN 14080:2013 GL30h EN 14080:2013

Side by side

ratio = GL30h / GL28h · log scale

Property	GL28h	GL30h	Unit	Ratio
E₁ Modulus, direction 1	12.6	13.6	GPa	1.08×
E₂ Modulus, direction 2	0.3	0.3	GPa	1×
E₃ Modulus, direction 3	0.3	0.3	GPa	1×
G₁₂ Shear modulus 1-2	0.65	0.65	GPa	1×
G₁₃ Shear modulus 1-3	0.65	0.65	GPa	1×
G₂₃ Shear modulus 2-3	0.065	0.065	GPa	1×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	10.5	11.3	GPa	1.08×
E₉₀,₀₅ Modulus perpendicular to grain, 5 % fractile	0.25	0.25	GPa	1×
G₀₅ Shear modulus, 5 % fractile	0.54	0.54	GPa	1×
G_r Rolling shear modulus	0.065	0.065	GPa	1×
ρ Density	460	480	kg/m³	1.04×
ρ_k Density, characteristic (5 % fractile)	425	430	kg/m³	1.01×
f_m,k Bending strength	28	30	MPa	1.07×
f_t,0,k Tension parallel to grain	22.3	24	MPa	1.08×
f_t,90,k Tension perpendicular to grain	0.5	0.5	MPa	1×
f_c,0,k Compression parallel to grain	28	30	MPa	1.07×
f_c,90,k Compression perpendicular to grain	2.5	2.5	MPa	1×
f_v,k Shear strength	3.5	3.5	MPa	1×
f_r,k Rolling shear strength	1.2	1.2	MPa	1×
E/ρ Specific stiffness E/ρ · derived	27.39	28.33	MJ/kg	1.03×
c₀ Bar wave speed √(E/ρ) · derived	5234	5323	m/s	1.02×
f/ρ Specific strength f/ρ · derived	60.87	62.5	kJ/kg	1.03×

Values at the first thickness band or product form of each material (EN 14080:2013; EN 14080:2013). A minimum and a characteristic value are not the same kind of number — read the ratio as a guide. Each material's page lists every band and every source.