ERGSTE® 1.4441 LA
Stainless austenitic special implant steel - Stock standard
Product standard:
ASTM F 138
ISO 5832-1
Material standard:
UNS S31673 Special Implant Stainless Steel
ISO 5832-1
(~AISI 316 LVM Special Quality Implant Grade)
Material description:
ERGSTE® 1.4441 LA (ESR) is an acid proof stainless steel produced by ESR or vacuum remelting and classification according to ASTM F 138 and ISO 5832-1 which makes it suitable for medical implants. The material´s tightened analysis requirements will ensure a consistent and high-quality.
Chemical analysis (%):
| Element: | ASTM F 138 | ISO 5832-1 Comp.D |
| C max. | 0,030 | 0,030 |
| Si max. | 0,75 | 1,0 |
| Mn max. | 2,00 | 2,0 |
| P max. | 0,025 | 0,025 |
| S max. | 0,010 | 0,010 |
| N max. | 0,10 | 0,10 |
| Cr | 17,0 – 19,0 | 17,0 – 19,0 |
| Mo | 2,25 – 3,00 | 2,25 – 3,5 |
| Ni | 13,0 – 15,0 | 13,0 – 15,0 |
| Cu max. | 0,50 | 0,50 |
| Fe | Rest | Rest |
Mechanical properties:
| Tensile strength, Rm [MPa] | |||
| Condition: | ASTM F 138 |
ISO 5832-1 |
ERGSTE 1.4441 LA |
| Extra hard | Min.1350 | - | 1400 - 1800 |
| Cold worked | Min.860 | 860 - 1100 | 930 – 1100 860 – 1100 |
| Annealed | Min.490 | 490 - 690 | 490 - 690 |
Condition:
Extra hard: Cold drawn, ground, polished; Cold worked: Cold drawn, ground, polished; Annealed: Hot rolled, quenched, peeled, polished.
Technical properties:
Straightness: ≤ 0,5 mm / 1000 mm
Delivery form:
Lengths of 3000 ±50 mm (ø2-20 mm)
Lengths of 3000 +500 mm (ø20-35 mm)
Tolerances:
According to DIN EN 10278 – ISO h07 – ISO h09
(see stock table)
| Diameter [mm] |
ISO h09 [mm] |
ISO h08 [mm] |
ISO h07 [mm] |
| >1 to 3 | +0/-0,025 | +0/-0,014 | +0/-0,010 |
| >3 to 6 | +0/-0,030 | +0/-0,018 | +0/-0,012 |
| >6 to 10 | +0/-0,036 | +0/-0,022 | +0/-0,015 |
| >10 to 18 | +0/-0,043 | +0/-0,027 | +0/-0,018 |
| >18 to 30 | +0/-0,052 | +0/-0,033 | +0/-0,021 |
| >30 to 50 | +0/-0,062 | +0/-0,039 | +0/-0,025 |
Stock dimensions:
| Dia. [mm] |
Tol. EN ISO |
Rm [MPa] | Ends |
| 2,00 | h7 | 1400-1800 | Both cut |
| 3,00 | h7 | 1400-1800 | Both cut |
| 4,00 | h7 | 930 – 1100 | Chamfered / pointed |
| 5,00 | h7 | 930 – 1100 | Chamfered / pointed |
| 6,00 | h7 | 930 – 1100 | Chamfered / pointed |
| 8,00 | h7 | 930 – 1100 | Chamfered / pointed |
| 10,0 | h7 | 930 – 1100 | Chamfered / pointed |
| 12,0 | h7 | 930 – 1100 | Chamfered / pointed |
| 14,0 | h7 | 930 – 1100 | Chamfered / pointed |
| 16,0 | h7 | 930 – 1100 | Chamfered / pointed |
| 20,0 | h7 | 860 – 1050 | Chamfered / pointed |
| 25,0 | h9 | 490 - 690 | Both cut |
| 30,0 | h9 | 490 - 690 | Both cut |
| 35,0 | h9 | 490 - 690 | Both cut |
Dimensions in range 0,80 – 80 mm from main stock or new production (wire, profile, strip, plate and tube also available).
ERGSTE is a Zapp® brand name.
Zapp® is a registered trademark of Zapp AG.
Zapp holds the following certificates and approvals: ISO 9001, ISO TS 16949 for automotive applications, AS 9100 for aeronautical applications, Pressurized Container Directives 97/23/EC and AD2000-W0.
Zapp-group representatives in Scandinavia: B.B.S. i Halmstad AB.
Subject to typing errors.