Steel GS200-SR (Stress relieved)
Heat-treated state
EN 1.0449
Use when dimensional stability after heavy machining or weld repair matters but no grain refinement is required.
Values for the SR condition
Other GS200 tempers and conditions
GS200 is listed in 6 conditions; see the grade overview at GS200.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | Cheapest condition for non-critical, lightly loaded castings where dendritic structure and residual stress are tolerable. | 200 | 410 | 20 | 125 HB | 10 % IACS |
SRThis page Stress relieved | Use when dimensional stability after heavy machining or weld repair matters but no grain refinement is required. | 200 | 405 | 23 | 118 HB | 10 % IACS |
Solution annealed | Softest and most machinable condition; pick it for heavily machined castings or where maximum ductility is wanted. | 200 | 400 | 27 | 112 HB | 10 % IACS |
NDefault Normalized | Standard supply condition: refines the as-cast structure and gives the specified 200 MPa yield with good toughness. | 220 | 430 | 25 | 125 HB | — |
Normalized and tempered | Choose when residual stresses from normalizing must be removed and slightly higher, more uniform toughness is required. | 225 | 425 | 26 | 122 HB | 10 % IACS |
Quenched and tempered | For thinner sections needing higher yield and toughness than normalized; hardenability of this low-C composition limits section size. | 300 | 500 | 23 | 155 HB | — |
What is GS200-SR?
GS200-SR is GS200 heat treated to SR — use when dimensional stability after heavy machining or weld repair matters but no grain refinement is required. GS200-SR has a yield strength of 200 MPa (29 ksi) and a tensile strength of 405 MPa (58.7 ksi) — weaker than 98% of steel grades. Elongation at break is 23% and the elastic modulus is 205 GPa (29.7 Msi). GS200-SR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). N is the default condition FabDigit quotes; SR is available on request or by drawing note.
Advantages
- Easy to machine — 63/100, better than 92% of steel grades
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
Limitations
- Low strength — 200 MPa (29 ksi), worse than 98% of steel grades
GS200-SR properties
Typical room-temperature values for GS200-SR; 22 are specific to this condition. Other listed values are GS200 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
GS200-SR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
GS200-SR has a yield strength of 200 MPa (29 ksi) and a tensile strength of 405 MPa (58.7 ksi) — weaker than 98% of steel grades. Elongation at break is 23% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
GS200-SR is rated for continuous service to 425°C (797 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
GS200-SR conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of GS200-SR takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 85%.
Manufacturability7
GS200-SR's machinability is good (63/100, better than 92% of steel grades); weldability excellent (88/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with GS200-SR
Is GS200 easy to machine?
Machines like mild steel but gummy — use positive-rake coated carbide, generous feed and coolant; skim sand skin and scale first to protect edges.
Can GS200 be welded?
Excellent weldability with E7018/ER70S-6; thin sections need no preheat, heavy sections 100–150 °C preheat and post-weld stress relief for repair welds.
Can GS200 be formed, bent or molded?
Green-sand or no-bake casting with ample risering and chills — the wide freezing range makes it prone to centreline shrinkage and hot tears at section changes.
What surface finishes work on GS200?
Shot-blast then prime/paint or zinc-coat; no useful natural corrosion resistance, and cast porosity limits mirror polishing and electroplating quality.
GS200 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Clow carbon for weldability; CE typically ≤0.45 | ≤ 0.23 | 0.18 |
| Si | ≤ 0.6 | 0.4 |
| Mn | ≤ 1 | 0.7 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.04 | 0.02 |
| Crresidual | ≤ 0.3 | — |
| Niresidual | ≤ 0.3 | — |
| Moresidual | ≤ 0.12 | — |
| Curesidual | ≤ 0.3 | — |
| Fe | balance | — |
GS200-SR — frequently asked
What is GS200-SR used for?
GS200-SR is typically used for general machinery castings, housings and low-load brackets. In short: most ductile cast carbon grade; excellent weldability; lightly stressed castings.
What is the yield strength of GS200-SR?
GS200-SR has a typical yield strength of 200 MPa (29 ksi) and a tensile strength of 405 MPa (58.7 ksi) — weaker than 98% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is GS200-SR easy to machine?
Reasonably — machinability is rated good (63/100, better than 92% of steel grades). Machines like mild steel but gummy — use positive-rake coated carbide, generous feed and coolant; skim sand skin and scale first to protect edges.
Can GS200-SR be welded?
Yes — weldability is rated excellent (88/100). Excellent weldability with E7018/ER70S-6; thin sections need no preheat, heavy sections 100–150 °C preheat and post-weld stress relief for repair welds.
What surface finishes work on GS200-SR?
Shot-blast then prime/paint or zinc-coat; no useful natural corrosion resistance, and cast porosity limits mirror polishing and electroplating quality.
Can GS200-SR be formed, bent or molded?
Green-sand or no-bake casting with ample risering and chills — the wide freezing range makes it prone to centreline shrinkage and hot tears at section changes.
What is the maximum service temperature of GS200-SR?
GS200-SR is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between GS200-N and GS200-QT?
N is the default condition — standard supply condition: refines the as-cast structure and gives the specified 200 MPa yield with good toughness. QT: for thinner sections needing higher yield and toughness than normalized; hardenability of this low-C composition limits section size. Yield strength is 220 MPa in N versus 300 MPa in QT.
Sources
- DIN 1681 — Cast steels for general engineering purposes — DIN (1985)
- EN 10293 — Steel castings for general engineering uses — CEN (2015)
- ASTM A216/A216M — Carbon steel castings for high-temperature service (WCA/WCB) — ASTM (2023)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Steel Castings Handbook — Steel Founders' Society of America / ASM (1995)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.